Merge github.com:grpc/grpc into you-complete-me

Conflicts:
	src/core/iomgr/resolve_address_posix.c
	src/core/surface/server.c

BUILD

@@ -143,7 +143,7 @@ cc_library(
     "src/core/tsi/ssl_transport_security.h",
     "src/core/tsi/transport_security.h",
     "src/core/tsi/transport_security_interface.h",
-    "src/core/channel/census_filter.h",
+    "src/core/census/grpc_context.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
     "src/core/channel/child_channel.h",
@@ -192,12 +192,6 @@ cc_library(
     "src/core/json/json_writer.h",
     "src/core/profiling/timers.h",
     "src/core/profiling/timers_preciseclock.h",
-    "src/core/statistics/census_interface.h",
-    "src/core/statistics/census_log.h",
-    "src/core/statistics/census_rpc_stats.h",
-    "src/core/statistics/census_tracing.h",
-    "src/core/statistics/hash_table.h",
-    "src/core/statistics/window_stats.h",
     "src/core/surface/byte_buffer_queue.h",
     "src/core/surface/call.h",
     "src/core/surface/channel.h",
@@ -230,6 +224,7 @@ cc_library(
     "src/core/transport/stream_op.h",
     "src/core/transport/transport.h",
     "src/core/transport/transport_impl.h",
+    "src/core/census/context.h",
     "src/core/httpcli/format_request.c",
     "src/core/httpcli/httpcli.c",
     "src/core/httpcli/httpcli_security_connector.c",
@@ -253,7 +248,7 @@ cc_library(
     "src/core/tsi/fake_transport_security.c",
     "src/core/tsi/ssl_transport_security.c",
     "src/core/tsi/transport_security.c",
-    "src/core/channel/census_filter.c",
+    "src/core/census/grpc_context.c",
     "src/core/channel/channel_args.c",
     "src/core/channel/channel_stack.c",
     "src/core/channel/child_channel.c",
@@ -305,12 +300,6 @@ cc_library(
     "src/core/json/json_writer.c",
     "src/core/profiling/basic_timers.c",
     "src/core/profiling/stap_timers.c",
-    "src/core/statistics/census_init.c",
-    "src/core/statistics/census_log.c",
-    "src/core/statistics/census_rpc_stats.c",
-    "src/core/statistics/census_tracing.c",
-    "src/core/statistics/hash_table.c",
-    "src/core/statistics/window_stats.c",
     "src/core/surface/byte_buffer.c",
     "src/core/surface/byte_buffer_queue.c",
     "src/core/surface/byte_buffer_reader.c",
@@ -350,6 +339,8 @@ cc_library(
     "src/core/transport/stream_op.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
+    "src/core/census/context.c",
+    "src/core/census/initialize.c",
   ],
   hdrs = [
     "include/grpc/grpc_security.h",
@@ -357,6 +348,7 @@ cc_library(
     "include/grpc/byte_buffer_reader.h",
     "include/grpc/grpc.h",
     "include/grpc/status.h",
+    "include/grpc/census.h",
   ],
   includes = [
     "include",
@@ -372,7 +364,7 @@ cc_library(
 cc_library(
   name = "grpc_unsecure",
   srcs = [
-    "src/core/channel/census_filter.h",
+    "src/core/census/grpc_context.h",
     "src/core/channel/channel_args.h",
     "src/core/channel/channel_stack.h",
     "src/core/channel/child_channel.h",
@@ -421,12 +413,6 @@ cc_library(
     "src/core/json/json_writer.h",
     "src/core/profiling/timers.h",
     "src/core/profiling/timers_preciseclock.h",
-    "src/core/statistics/census_interface.h",
-    "src/core/statistics/census_log.h",
-    "src/core/statistics/census_rpc_stats.h",
-    "src/core/statistics/census_tracing.h",
-    "src/core/statistics/hash_table.h",
-    "src/core/statistics/window_stats.h",
     "src/core/surface/byte_buffer_queue.h",
     "src/core/surface/call.h",
     "src/core/surface/channel.h",
@@ -459,8 +445,9 @@ cc_library(
     "src/core/transport/stream_op.h",
     "src/core/transport/transport.h",
     "src/core/transport/transport_impl.h",
+    "src/core/census/context.h",
     "src/core/surface/init_unsecure.c",
-    "src/core/channel/census_filter.c",
+    "src/core/census/grpc_context.c",
     "src/core/channel/channel_args.c",
     "src/core/channel/channel_stack.c",
     "src/core/channel/child_channel.c",
@@ -512,12 +499,6 @@ cc_library(
     "src/core/json/json_writer.c",
     "src/core/profiling/basic_timers.c",
     "src/core/profiling/stap_timers.c",
-    "src/core/statistics/census_init.c",
-    "src/core/statistics/census_log.c",
-    "src/core/statistics/census_rpc_stats.c",
-    "src/core/statistics/census_tracing.c",
-    "src/core/statistics/hash_table.c",
-    "src/core/statistics/window_stats.c",
     "src/core/surface/byte_buffer.c",
     "src/core/surface/byte_buffer_queue.c",
     "src/core/surface/byte_buffer_reader.c",
@@ -557,12 +538,15 @@ cc_library(
     "src/core/transport/stream_op.c",
     "src/core/transport/transport.c",
     "src/core/transport/transport_op_string.c",
+    "src/core/census/context.c",
+    "src/core/census/initialize.c",
   ],
   hdrs = [
     "include/grpc/byte_buffer.h",
     "include/grpc/byte_buffer_reader.h",
     "include/grpc/grpc.h",
     "include/grpc/status.h",
+    "include/grpc/census.h",
   ],
   includes = [
     "include",

build.json

@@ -12,6 +12,19 @@
     }
   },
   "filegroups": [
+    {
+      "name": "census",
+      "public_headers": [
+        "include/grpc/census.h"
+      ],
+      "headers": [
+        "src/core/census/context.h"
+      ],
+      "src": [
+        "src/core/census/context.c",
+        "src/core/census/initialize.c"
+      ]
+    },
     {
       "name": "grpc++_base",
       "public_headers": [
@@ -91,7 +104,7 @@
         "include/grpc/status.h"
       ],
       "headers": [
-        "src/core/channel/census_filter.h",
+        "src/core/census/grpc_context.h",
         "src/core/channel/channel_args.h",
         "src/core/channel/channel_stack.h",
         "src/core/channel/child_channel.h",
@@ -140,12 +153,6 @@
         "src/core/json/json_writer.h",
         "src/core/profiling/timers.h",
         "src/core/profiling/timers_preciseclock.h",
-        "src/core/statistics/census_interface.h",
-        "src/core/statistics/census_log.h",
-        "src/core/statistics/census_rpc_stats.h",
-        "src/core/statistics/census_tracing.h",
-        "src/core/statistics/hash_table.h",
-        "src/core/statistics/window_stats.h",
         "src/core/surface/byte_buffer_queue.h",
         "src/core/surface/call.h",
         "src/core/surface/channel.h",
@@ -180,7 +187,7 @@
         "src/core/transport/transport_impl.h"
       ],
       "src": [
-        "src/core/channel/census_filter.c",
+        "src/core/census/grpc_context.c",
         "src/core/channel/channel_args.c",
         "src/core/channel/channel_stack.c",
         "src/core/channel/child_channel.c",
@@ -232,12 +239,6 @@
         "src/core/json/json_writer.c",
         "src/core/profiling/basic_timers.c",
         "src/core/profiling/stap_timers.c",
-        "src/core/statistics/census_init.c",
-        "src/core/statistics/census_log.c",
-        "src/core/statistics/census_rpc_stats.c",
-        "src/core/statistics/census_tracing.c",
-        "src/core/statistics/hash_table.c",
-        "src/core/statistics/window_stats.c",
         "src/core/surface/byte_buffer.c",
         "src/core/surface/byte_buffer_queue.c",
         "src/core/surface/byte_buffer_reader.c",
@@ -284,7 +285,6 @@
       "src": [
         "test/core/end2end/cq_verifier.c",
         "test/core/iomgr/endpoint_tests.c",
-        "test/core/statistics/census_log_tests.c",
         "test/core/util/grpc_profiler.c",
         "test/core/util/parse_hexstring.c",
         "test/core/util/port_posix.c",
@@ -448,7 +448,8 @@
       ],
       "baselib": true,
       "filegroups": [
-        "grpc_base"
+        "grpc_base",
+        "census"
       ],
       "secure": "yes",
       "vs_project_guid": "{29D16885-7228-4C31-81ED-5F9187C7F2A9}"
@@ -499,7 +500,8 @@
       ],
       "baselib": true,
       "filegroups": [
-        "grpc_base"
+        "grpc_base",
+        "census"
       ],
       "secure": "no",
       "vs_project_guid": "{46CEDFFF-9692-456A-AA24-38B5D6BCF4C5}"
@@ -801,147 +803,6 @@
         "gpr"
       ]
     },
-    {
-      "name": "census_hash_table_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/hash_table_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_statistics_multiple_writers_circular_buffer_test",
-      "flaky": true,
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/multiple_writers_circular_buffer_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_statistics_multiple_writers_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/multiple_writers_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_statistics_performance_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/performance_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_statistics_quick_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/quick_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_statistics_small_log_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/small_log_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_stats_store_test",
-      "build": "executable",
-      "language": "c",
-      "src": [
-        "test/core/statistics/rpc_stats_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_stub_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/census_stub_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_trace_store_test",
-      "build": "executable",
-      "language": "c",
-      "src": [
-        "test/core/statistics/trace_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
-    {
-      "name": "census_window_stats_test",
-      "build": "test",
-      "language": "c",
-      "src": [
-        "test/core/statistics/window_stats_test.c"
-      ],
-      "deps": [
-        "grpc_test_util",
-        "grpc",
-        "gpr_test_util",
-        "gpr"
-      ]
-    },
     {
       "name": "chttp2_status_conversion_test",
       "build": "test",

gRPC.podspec

@@ -1,13 +1,13 @@
 Pod::Spec.new do |s|
   s.name     = 'gRPC'
-  s.version  = '0.0.1'
-  s.summary  = 'Generic gRPC client library for iOS/OSX'
-  s.homepage = 'https://www.grpc.io'
+  s.version  = '0.5.1'
+  s.summary  = 'gRPC client library for iOS/OSX'
+  s.homepage = 'http://www.grpc.io'
   s.license  = 'New BSD'
-  s.authors  = { 'Jorge Canizales' => 'jcanizales@google.com',
-                 'Michael Lumish'  => 'mlumish@google.com' }
+  s.authors  = { 'The gRPC contributors' => 'grpc-packages@google.com' }
 
-  # s.source = { :git => 'https://github.com/grpc/grpc.git',  :tag => 'release-0_5_0' }
+  # s.source = { :git => 'https://github.com/grpc/grpc.git',
+  #              :tag => 'release-0_9_1-objectivec-0.5.1' }
 
   s.ios.deployment_target = '6.0'
   s.osx.deployment_target = '10.8'
@@ -15,7 +15,6 @@ Pod::Spec.new do |s|
 
   s.subspec 'RxLibrary' do |rs|
     rs.summary  = 'Reactive Extensions library for iOS.'
-    rs.authors  = { 'Jorge Canizales' => 'jcanizales@google.com' }
 
     rs.source_files = 'src/objective-c/RxLibrary/*.{h,m}',
                       'src/objective-c/RxLibrary/transformations/*.{h,m}',
@@ -25,16 +24,13 @@ Pod::Spec.new do |s|
 
   s.subspec 'C-Core' do |cs|
     cs.summary  = 'Core cross-platform gRPC library, written in C.'
-    cs.authors = { 'Craig Tiller'   => 'ctiller@google.com',
-                   'David Klempner' => 'klempner@google.com',
-                   'Nicolas Noble'  => 'nnoble@google.com',
-                   'Vijay Pai'      => 'vpai@google.com',
-                   'Yang Gao'       => 'yangg@google.com' }
 
     cs.source_files = 'src/core/**/*.{h,c}', 'include/grpc/*.h', 'include/grpc/**/*.h'
     cs.private_header_files = 'src/core/**/*.h'
     cs.header_mappings_dir = '.'
-    cs.xcconfig = { 'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/Headers/Build/gRPC" "$(PODS_ROOT)/Headers/Build/gRPC/include"' }
+    cs.xcconfig = { 'HEADER_SEARCH_PATHS' => '"$(PODS_ROOT)/Headers/Build/gRPC" '
+                                             '"$(PODS_ROOT)/Headers/Build/gRPC/include"' }
+    cs.compiler_flags = '-GCC_WARN_INHIBIT_ALL_WARNINGS', '-w'
 
     cs.requires_arc = false
     cs.libraries = 'z'
@@ -67,8 +63,6 @@ Pod::Spec.new do |s|
 
   s.subspec 'GRPCClient' do |gs|
     gs.summary = 'Objective-C wrapper around the core gRPC library.'
-    gs.authors  = { 'Jorge Canizales' => 'jcanizales@google.com',
-                    'Michael Lumish'  => 'mlumish@google.com' }
 
     gs.source_files = 'src/objective-c/GRPCClient/*.{h,m}',
                       'src/objective-c/GRPCClient/private/*.{h,m}'
@@ -85,7 +79,6 @@ Pod::Spec.new do |s|
 
   s.subspec 'ProtoRPC' do |ps|
     ps.summary  = 'RPC library for ProtocolBuffers, based on gRPC'
-    ps.authors  = { 'Jorge Canizales' => 'jcanizales@google.com' }
 
     ps.source_files = 'src/objective-c/ProtoRPC/*.{h,m}'
 

include/grpc++/impl/sync_no_cxx11.h

@@ -76,9 +76,9 @@ class lock_guard {
 template <class mutex>
 class unique_lock : public lock_guard<mutex> {
  public:
-  unique_lock(mutex &mu) : lock_guard(mu) { }
-  void lock() { lock_internal(); }
-  void unlock() { unlock_internal(); }
+  unique_lock(mutex &mu) : lock_guard<mutex>(mu) { }
+  void lock() { this->lock_internal(); }
+  void unlock() { this->unlock_internal(); }
 };
 
 class condition_variable {

include/grpc++/impl/thd_no_cxx11.h

@@ -82,6 +82,10 @@ class thread {
   thread_function_base *func_;
   gpr_thd_id thd_;
   bool joined_;
+
+  // Disallow copy and assign.
+  thread(const thread&);
+  void operator=(const thread&);
 };
 
 }  // namespace grpc

include/grpc++/server_context.h

@@ -106,6 +106,10 @@ class ServerContext {
   template <class R, class W>
   friend class ::grpc::ServerReaderWriter;
 
+  // Prevent copying.
+  ServerContext(const ServerContext&);
+  ServerContext& operator=(const ServerContext&);
+
   class CompletionOp;
 
   void BeginCompletionOp(Call* call);

include/grpc/census.h

@@ -0,0 +1,95 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/* RPC-internal Census API's. These are designed to be generic enough that
+ * they can (ultimately) be used in many different RPC systems (with differing
+ * implementations). */
+
+#ifndef CENSUS_CENSUS_H
+#define CENSUS_CENSUS_H
+
+#include <grpc/grpc.h>
+
+/* Identify census functionality that can be enabled via census_initialize(). */
+enum census_functions {
+  CENSUS_NONE = 0,    /* Do not enable census. */
+  CENSUS_TRACING = 1, /* Enable census tracing. */
+  CENSUS_STATS = 2,   /* Enable Census stats collection. */
+  CENSUS_CPU = 4,     /* Enable Census CPU usage collection. */
+  CENSUS_ALL = CENSUS_TRACING | CENSUS_STATS | CENSUS_CPU
+};
+
+/* Shutdown and startup census subsystem. The 'functions' argument should be
+ * the OR (|) of census_functions values. If census fails to initialize, then
+ * census_initialize() will return a non-zero value. It is an error to call
+ * census_initialize() more than once (without an intervening
+ * census_shutdown()). */
+int census_initialize(int functions);
+void census_shutdown();
+
+/* Internally, Census relies on a context, which should be propagated across
+ * RPC's. From the RPC subsystems viewpoint, this is an opaque data structure.
+ * A context must be used as the first argument to all other census
+ * functions. Conceptually, contexts should be thought of as specific to
+ * single RPC/thread. The context can be serialized for passing across the
+ * wire. */
+typedef struct census_context census_context;
+
+/* This function is called by the RPC subsystem whenever it needs to get a
+ * serialized form of the current census context (presumably to pass across
+ * the wire). Arguments:
+ * 'buffer': pointer to memory into which serialized context will be placed
+ * 'buf_size': size of 'buffer'
+ *
+ * Returns: the number of bytes used in buffer if successful, or 0 if the
+ * buffer is of insufficient size.
+ *
+ * TODO(aveitch): determine how best to communicate required/max buffer size
+ * so caller doesn't have to guess. */
+size_t census_context_serialize(const census_context *context, char *buffer,
+                                size_t buf_size);
+
+/* Create a new census context, possibly from a serialized buffer. If 'buffer'
+ * is non-NULL, it is assumed that it is a buffer encoded by
+ * census_context_serialize(). If `buffer` is NULL, a new, empty context is
+ * created. The decoded/new contest is returned in 'context'.
+ *
+ * Returns 0 if no errors, non-zero if buffer is incorrectly formatted, in
+ * which case a new empty context will be returned. */
+int census_context_deserialize(const char *buffer, census_context **context);
+
+/* The given context is destroyed. Once destroyed, using the context in
+ * future census calls will result in undefined behavior. */
+void census_context_destroy(census_context *context);
+
+#endif /* CENSUS_CENSUS_H */

src/compiler/objective_c_generator.cc

@@ -32,19 +32,20 @@
  */
 
 #include <map>
+#include <sstream>
 
+#include "src/compiler/config.h"
 #include "src/compiler/objective_c_generator.h"
 #include "src/compiler/objective_c_generator_helpers.h"
 
-#include "src/compiler/config.h"
-
-#include <sstream>
+#include <google/protobuf/compiler/objectivec/objectivec_helpers.h>
 
+using ::google::protobuf::compiler::objectivec::ClassName;
 using ::grpc::protobuf::io::Printer;
 using ::grpc::protobuf::MethodDescriptor;
 using ::grpc::protobuf::ServiceDescriptor;
-using ::std::map;
 using ::grpc::string;
+using ::std::map;
 
 namespace grpc_objective_c_generator {
 namespace {
@@ -69,7 +70,7 @@ void PrintMethodSignature(Printer *printer,
   if (method->client_streaming()) {
     printer->Print("RequestsWriter:(id<GRXWriter>)request");
   } else {
-    printer->Print(vars, "Request:($prefix$$request_type$ *)request");
+    printer->Print(vars, "Request:($request_class$ *)request");
   }
 
   // TODO(jcanizales): Put this on a new line and align colons.
@@ -78,8 +79,7 @@ void PrintMethodSignature(Printer *printer,
   if (method->server_streaming()) {
     printer->Print("BOOL done, ");
   }
-  printer->Print(vars,
-      "$prefix$$response_type$ *response, NSError *error))handler");
+  printer->Print(vars, "$response_class$ *response, NSError *error))handler");
 }
 
 void PrintSimpleSignature(Printer *printer,
@@ -99,12 +99,17 @@ void PrintAdvancedSignature(Printer *printer,
   PrintMethodSignature(printer, method, vars);
 }
 
+inline map<string, string> GetMethodVars(const MethodDescriptor *method) {
+  return {{ "method_name", method->name() },
+          { "request_type", method->input_type()->name() },
+          { "response_type", method->output_type()->name() },
+          { "request_class", ClassName(method->input_type()) },
+          { "response_class", ClassName(method->output_type()) }};
+}
+
 void PrintMethodDeclarations(Printer *printer,
-                             const MethodDescriptor *method,
-                             map<string, string> vars) {
-  vars["method_name"] = method->name();
-  vars["request_type"] = method->input_type()->name();
-  vars["response_type"] = method->output_type()->name();
+                             const MethodDescriptor *method) {
+  map<string, string> vars = GetMethodVars(method);
 
   PrintProtoRpcDeclarationAsPragma(printer, method, vars);
 
@@ -141,8 +146,7 @@ void PrintAdvancedImplementation(Printer *printer,
     printer->Print("[GRXWriter writerWithValue:request]\n");
   }
 
-  printer->Print(vars,
-      "             responseClass:[$prefix$$response_type$ class]\n");
+  printer->Print(vars, "             responseClass:[$response_class$ class]\n");
 
   printer->Print("        responsesWriteable:[GRXWriteable ");
   if (method->server_streaming()) {
@@ -155,11 +159,8 @@ void PrintAdvancedImplementation(Printer *printer,
 }
 
 void PrintMethodImplementations(Printer *printer,
-                                const MethodDescriptor *method,
-                                map<string, string> vars) {
-  vars["method_name"] = method->name();
-  vars["request_type"] = method->input_type()->name();
-  vars["response_type"] = method->output_type()->name();
+                                const MethodDescriptor *method) {
+  map<string, string> vars = GetMethodVars(method);
 
   PrintProtoRpcDeclarationAsPragma(printer, method, vars);
 
@@ -174,7 +175,7 @@ void PrintMethodImplementations(Printer *printer,
 
 } // namespace
 
-string GetHeader(const ServiceDescriptor *service, const string prefix) {
+string GetHeader(const ServiceDescriptor *service) {
   string output;
   {
     // Scope the output stream so it closes and finalizes output to the string.
@@ -184,19 +185,19 @@ string GetHeader(const ServiceDescriptor *service, const string prefix) {
     printer.Print("@protocol GRXWriteable;\n");
     printer.Print("@protocol GRXWriter;\n\n");
 
-    map<string, string> vars = {{"service_name", service->name()},
-                                {"prefix",       prefix}};
-    printer.Print(vars, "@protocol $prefix$$service_name$ <NSObject>\n\n");
+    map<string, string> vars = {{"service_class", ServiceClassName(service)}};
+
+    printer.Print(vars, "@protocol $service_class$ <NSObject>\n\n");
 
     for (int i = 0; i < service->method_count(); i++) {
-      PrintMethodDeclarations(&printer, service->method(i), vars);
+      PrintMethodDeclarations(&printer, service->method(i));
     }
     printer.Print("@end\n\n");
 
     printer.Print("// Basic service implementation, over gRPC, that only does"
         " marshalling and parsing.\n");
-    printer.Print(vars, "@interface $prefix$$service_name$ :"
-      " ProtoService<$prefix$$service_name$>\n");
+    printer.Print(vars, "@interface $service_class$ :"
+      " ProtoService<$service_class$>\n");
     printer.Print("- (instancetype)initWithHost:(NSString *)host"
       " NS_DESIGNATED_INITIALIZER;\n");
     printer.Print("@end\n");
@@ -204,7 +205,7 @@ string GetHeader(const ServiceDescriptor *service, const string prefix) {
   return output;
 }
 
-string GetSource(const ServiceDescriptor *service, const string prefix) {
+string GetSource(const ServiceDescriptor *service) {
   string output;
   {
     // Scope the output stream so it closes and finalizes output to the string.
@@ -212,15 +213,15 @@ string GetSource(const ServiceDescriptor *service, const string prefix) {
     Printer printer(&output_stream, '$');
 
     map<string, string> vars = {{"service_name", service->name()},
-                                {"package", service->file()->package()},
-                                {"prefix",       prefix}};
+                                {"service_class", ServiceClassName(service)},
+                                {"package", service->file()->package()}};
 
     printer.Print(vars,
         "static NSString *const kPackageName = @\"$package$\";\n");
     printer.Print(vars,
         "static NSString *const kServiceName = @\"$service_name$\";\n\n");
 
-    printer.Print(vars, "@implementation $prefix$$service_name$\n\n");
+    printer.Print(vars, "@implementation $service_class$\n\n");
   
     printer.Print("// Designated initializer\n");
     printer.Print("- (instancetype)initWithHost:(NSString *)host {\n");
@@ -236,7 +237,7 @@ string GetSource(const ServiceDescriptor *service, const string prefix) {
     printer.Print("}\n\n\n");
 
     for (int i = 0; i < service->method_count(); i++) {
-      PrintMethodImplementations(&printer, service->method(i), vars);
+      PrintMethodImplementations(&printer, service->method(i));
     }
 
     printer.Print("@end\n");

src/compiler/objective_c_generator.h

@@ -38,15 +38,16 @@
 
 namespace grpc_objective_c_generator {
 
+using ::grpc::protobuf::ServiceDescriptor;
+using ::grpc::string;
+
 // Returns the content to be included in the "global_scope" insertion point of
 // the generated header file.
-grpc::string GetHeader(const grpc::protobuf::ServiceDescriptor *service,
-                       const grpc::string prefix);
+string GetHeader(const ServiceDescriptor *service);
 
 // Returns the content to be included in the "global_scope" insertion point of
 // the generated implementation file.
-grpc::string GetSource(const grpc::protobuf::ServiceDescriptor *service,
-                       const grpc::string prefix);
+string GetSource(const ServiceDescriptor *service);
 
 }  // namespace grpc_objective_c_generator
 

src/compiler/objective_c_generator_helpers.h

@@ -40,9 +40,19 @@
 
 namespace grpc_objective_c_generator {
 
-inline grpc::string MessageHeaderName(const grpc::protobuf::FileDescriptor *file) {
+using ::grpc::protobuf::FileDescriptor;
+using ::grpc::protobuf::ServiceDescriptor;
+using ::grpc::string;
+
+inline string MessageHeaderName(const FileDescriptor *file) {
   return grpc_generator::FileNameInUpperCamel(file) + ".pbobjc.h";
 }
 
+inline string ServiceClassName(const ServiceDescriptor *service) {
+  const FileDescriptor *file = service->file();
+  string prefix = file->options().objc_class_prefix();
+  return prefix + service->name();
+}
+
 }
 #endif  // GRPC_INTERNAL_COMPILER_OBJECTIVE_C_GENERATOR_HELPERS_H

src/compiler/objective_c_plugin.cc

@@ -77,7 +77,7 @@ class ObjectiveCGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
       string declarations;
       for (int i = 0; i < file->service_count(); i++) {
         const grpc::protobuf::ServiceDescriptor *service = file->service(i);
-        declarations += grpc_objective_c_generator::GetHeader(service, prefix);
+        declarations += grpc_objective_c_generator::GetHeader(service);
       }
 
       Write(context, file_name + ".pbrpc.h",
@@ -95,7 +95,7 @@ class ObjectiveCGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
       string definitions;
       for (int i = 0; i < file->service_count(); i++) {
         const grpc::protobuf::ServiceDescriptor *service = file->service(i);
-        definitions += grpc_objective_c_generator::GetSource(service, prefix);
+        definitions += grpc_objective_c_generator::GetSource(service);
       }
 
       Write(context, file_name + ".pbrpc.m", imports + '\n' + definitions);

src/python/src/grpc/_adapter/_call.h → src/core/census/README.md

@@ -1,5 +1,4 @@
-/*
- *
+<!---
  * Copyright 2015, Google Inc.
  * All rights reserved.
  *
@@ -28,50 +27,50 @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
+-->
+
+# Census - a resource measurement and tracing system
 
-#ifndef _ADAPTER__CALL_H_
-#define _ADAPTER__CALL_H_
+This directory contains code for Census, which will ultimately provide the
+following features for any gRPC-using system:
+* A [dapper](http://research.google.com/pubs/pub36356.html)-like tracing
+  system, enabling tracing across a distributed infrastructure.
+* RPC statistics and measurements for key metrics, such as latency, bytes
+  transferred, number of errors etc.
+* Resource measurement framework which can be used for measuring custom
+  metrics. Through the use of [tags](#Tags), these can be broken down across
+  the entire distributed stack.
+* Easy integration of the above with
+  [Google Cloud Trace](https://cloud.google.com/tools/cloud-trace) and
+  [Google Cloud Monitoring](https://cloud.google.com/monitoring/).
 
-#include <Python.h>
-#include <grpc/grpc.h>
+## Concepts
 
-#include "grpc/_adapter/_completion_queue.h"
-#include "grpc/_adapter/_channel.h"
-#include "grpc/_adapter/_server.h"
+### Context
 
-typedef struct {
-  PyObject_HEAD
+### Operations
 
-  CompletionQueue *completion_queue;
-  Channel *channel;
-  Server *server;
+### Tags
 
-  /* Legacy state. */
-  grpc_call_details call_details;
-  grpc_metadata_array recv_metadata;
-  grpc_metadata_array recv_trailing_metadata;
-  grpc_metadata *send_metadata;
-  size_t send_metadata_count;
-  grpc_metadata *send_trailing_metadata;
-  size_t send_trailing_metadata_count;
-  int adding_to_trailing;
+### Metrics
 
-  grpc_byte_buffer *send_message;
-  grpc_byte_buffer *recv_message;
+## API
 
-  grpc_status_code status;
-  char *status_details;
-  size_t status_details_capacity;
+### Internal/RPC API
 
-  int cancelled;
+### External/Client API
 
-  grpc_call *c_call;
-} Call;
+### RPC API
 
-extern PyTypeObject pygrpc_CallType;
+## Files in this directory
 
-int pygrpc_add_call(PyObject *module);
+Note that files and functions in this directory can be split into two
+categories:
+* Files that define core census library functions. Functions etc. in these
+  files are named census\_\*, and constitute the core census library
+  functionality. At some time in the future, these will become a standalone
+  library.
+* Files that define functions etc. that provide a convenient interface between
+  grpc and the core census functionality. These files are all named
+  grpc\_\*.{c,h}, and define function names beginning with grpc\_census\_\*.
 
-#endif /* _ADAPTER__CALL_H_ */

src/python/src/grpc/_adapter/_client_credentials.h → src/core/census/context.c

@@ -31,19 +31,29 @@
  *
  */
 
-#ifndef _ADAPTER__CLIENT_CREDENTIALS_H_
-#define _ADAPTER__CLIENT_CREDENTIALS_H_
+#include "context.h"
 
-#include <Python.h>
-#include <grpc/grpc_security.h>
+#include <string.h>
+#include <grpc/census.h>
+#include <grpc/support/alloc.h>
 
-typedef struct {
-  PyObject_HEAD
-  grpc_credentials *c_client_credentials;
-} ClientCredentials;
+/* Placeholder implementation only. */
 
-extern PyTypeObject pygrpc_ClientCredentialsType;
+size_t census_context_serialize(const census_context *context, char *buffer,
+                                size_t buf_size) {
+  /* TODO(aveitch): implement serialization */
+  return 0;
+}
 
-int pygrpc_add_client_credentials(PyObject *module);
+int census_context_deserialize(const char *buffer, census_context **context) {
+  int ret = 0;
+  if (buffer != NULL) {
+    /* TODO(aveitch): implement deserialization. */
+    ret = 1;
+  }
+  *context = gpr_malloc(sizeof(census_context));
+  memset(*context, 0, sizeof(census_context));
+  return ret;
+}
 
-#endif /* _ADAPTER__CLIENT_CREDENTIALS_H_ */
+void census_context_destroy(census_context *context) { gpr_free(context); }

src/python/src/grpc/_adapter/_completion_queue.h → src/core/census/context.h

@@ -31,19 +31,19 @@
  *
  */
 
-#ifndef _ADAPTER__COMPLETION_QUEUE_H_
-#define _ADAPTER__COMPLETION_QUEUE_H_
+#ifndef GRPC_INTERNAL_CORE_CENSUS_CONTEXT_H
+#define GRPC_INTERNAL_CORE_CENSUS_CONTEXT_H
 
-#include <Python.h>
-#include <grpc/grpc.h>
+#include <grpc/census.h>
 
-typedef struct {
-  PyObject_HEAD
-  grpc_completion_queue *c_completion_queue;
-} CompletionQueue;
+/* census_context is the in-memory representation of information needed to
+ * maintain tracing, RPC statistics and resource usage information. */
+struct census_context {
+  gpr_uint64 op_id;    /* Operation identifier - unique per-context */
+  gpr_uint64 trace_id; /* Globally unique trace identifier */
+  /* TODO(aveitch) Add census tags:
+  const census_tag_set *tags;
+  */
+};
 
-extern PyTypeObject pygrpc_CompletionQueueType;
-
-int pygrpc_add_completion_queue(PyObject *module);
-
-#endif /* _ADAPTER__COMPLETION_QUEUE_H_ */
+#endif /* GRPC_INTERNAL_CORE_CENSUS_CONTEXT_H */

src/python/src/grpc/_adapter/_channel.h → src/core/census/grpc_context.c

@@ -31,19 +31,15 @@
  *
  */
 
-#ifndef _ADAPTER__CHANNEL_H_
-#define _ADAPTER__CHANNEL_H_
+#include <grpc/census.h>
+#include "src/core/census/grpc_context.h"
 
-#include <Python.h>
-#include <grpc/grpc.h>
+void *grpc_census_context_create() {
+  census_context *context;
+  census_context_deserialize(NULL, &context);
+  return (void *)context;
+}
 
-typedef struct {
-  PyObject_HEAD
-  grpc_channel *c_channel;
-} Channel;
-
-extern PyTypeObject pygrpc_ChannelType;
-
-int pygrpc_add_channel(PyObject *module);
-
-#endif /* _ADAPTER__CHANNEL_H_ */
+void grpc_census_context_destroy(void *context) {
+  census_context_destroy((census_context *)context);
+}

src/python/src/grpc/_adapter/_error.h → src/core/census/grpc_context.h

@@ -31,12 +31,12 @@
  *
  */
 
-#ifndef _ADAPTER__ERROR_H_
-#define _ADAPTER__ERROR_H_
+/* GRPC <--> CENSUS context interface */
 
-#include <Python.h>
-#include <grpc/grpc.h>
+#ifndef CENSUS_GRPC_CONTEXT_H
+#define CENSUS_GRPC_CONTEXT_H
 
-const PyObject *pygrpc_translate_call_error(grpc_call_error call_error);
+void *grpc_census_context_create();
+void grpc_census_context_destroy(void *context);
 
-#endif /* _ADAPTER__ERROR_H_ */
+#endif /* CENSUS_GRPC_CONTEXT_H */

src/python/src/grpc/_adapter/_server.h → src/core/census/initialize.c

@@ -31,21 +31,20 @@
  *
  */
 
-#ifndef _ADAPTER__SERVER_H_
-#define _ADAPTER__SERVER_H_
+#include <grpc/census.h>
 
-#include <Python.h>
-#include <grpc/grpc.h>
+static int census_fns_enabled = CENSUS_NONE;
 
-#include "grpc/_adapter/_completion_queue.h"
+int census_initialize(int functions) {
+  if (census_fns_enabled != CENSUS_NONE) {
+    return 1;
+  }
+  if (functions != CENSUS_NONE) {
+    return 1;
+  } else {
+    census_fns_enabled = functions;
+    return 0;
+  }
+}
 
-typedef struct {
-  PyObject_HEAD
-
-  CompletionQueue *completion_queue;
-  grpc_server *c_server;
-} Server;
-
-int pygrpc_add_server(PyObject *module);
-
-#endif /* _ADAPTER__SERVER_H_ */
+void census_shutdown() { census_fns_enabled = CENSUS_NONE; }

src/core/channel/child_channel.c

@@ -58,6 +58,9 @@ typedef struct {
   gpr_uint8 sending_farewell;
   /* have we sent farewell (goaway + disconnect) */
   gpr_uint8 sent_farewell;
+
+  grpc_iomgr_closure finally_destroy_channel_closure;
+  grpc_iomgr_closure send_farewells_closure;
 } lb_channel_data;
 
 typedef struct { grpc_child_channel *channel; } lb_call_data;
@@ -213,12 +216,16 @@ static void maybe_destroy_channel(grpc_child_channel *channel) {
   lb_channel_data *chand = LINK_BACK_ELEM_FROM_CHANNEL(channel)->channel_data;
   if (chand->destroyed && chand->disconnected && chand->active_calls == 0 &&
       !chand->sending_farewell && !chand->calling_back) {
-    grpc_iomgr_add_callback(finally_destroy_channel, channel);
+    chand->finally_destroy_channel_closure.cb = finally_destroy_channel;
+    chand->finally_destroy_channel_closure.cb_arg = channel;
+    grpc_iomgr_add_callback(&chand->finally_destroy_channel_closure);
   } else if (chand->destroyed && !chand->disconnected &&
              chand->active_calls == 0 && !chand->sending_farewell &&
              !chand->sent_farewell) {
     chand->sending_farewell = 1;
-    grpc_iomgr_add_callback(send_farewells, channel);
+    chand->send_farewells_closure.cb = send_farewells;
+    chand->send_farewells_closure.cb_arg = channel;
+    grpc_iomgr_add_callback(&chand->send_farewells_closure);
   }
 }
 

src/core/iomgr/endpoint_pair.h

@@ -41,6 +41,7 @@ typedef struct {
   grpc_endpoint *server;
 } grpc_endpoint_pair;
 
-grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(size_t read_slice_size);
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
+                                                   size_t read_slice_size);
 
 #endif  /* GRPC_INTERNAL_CORE_IOMGR_ENDPOINT_PAIR_H */

src/core/iomgr/endpoint_pair_posix.c

@@ -44,6 +44,8 @@
 #include <sys/socket.h>
 
 #include "src/core/iomgr/tcp_posix.h"
+#include "src/core/support/string.h"
+#include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 
 static void create_sockets(int sv[2]) {
@@ -55,12 +57,21 @@ static void create_sockets(int sv[2]) {
   GPR_ASSERT(fcntl(sv[1], F_SETFL, flags | O_NONBLOCK) == 0);
 }
 
-grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(size_t read_slice_size) {
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name,
+                                                   size_t read_slice_size) {
   int sv[2];
   grpc_endpoint_pair p;
+  char *final_name;
   create_sockets(sv);
-  p.client = grpc_tcp_create(grpc_fd_create(sv[1]), read_slice_size);
-  p.server = grpc_tcp_create(grpc_fd_create(sv[0]), read_slice_size);
+
+  gpr_asprintf(&final_name, "%s:client", name);
+  p.client =
+      grpc_tcp_create(grpc_fd_create(sv[1], final_name), read_slice_size);
+  gpr_free(final_name);
+  gpr_asprintf(&final_name, "%s:server", name);
+  p.server =
+      grpc_tcp_create(grpc_fd_create(sv[0], final_name), read_slice_size);
+  gpr_free(final_name);
   return p;
 }
 

src/core/iomgr/endpoint_pair_windows.c

@@ -77,12 +77,12 @@ static void create_sockets(SOCKET sv[2]) {
   sv[0] = svr_sock;
 }
 
-grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(size_t read_slice_size) {
+grpc_endpoint_pair grpc_iomgr_create_endpoint_pair(const char *name, size_t read_slice_size) {
   SOCKET sv[2];
   grpc_endpoint_pair p;
   create_sockets(sv);
-  p.client = grpc_tcp_create(grpc_winsocket_create(sv[1]));
-  p.server = grpc_tcp_create(grpc_winsocket_create(sv[0]));
+  p.client = grpc_tcp_create(grpc_winsocket_create(sv[1], "endpoint:client"));
+  p.server = grpc_tcp_create(grpc_winsocket_create(sv[0], "endpoint:server"));
   return p;
 }
 

src/core/iomgr/fd_posix.c

@@ -41,7 +41,6 @@
 #include <sys/socket.h>
 #include <unistd.h>
 
-#include "src/core/iomgr/iomgr_internal.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/useful.h>
@@ -91,6 +90,7 @@ static grpc_fd *alloc_fd(int fd) {
     gpr_mu_init(&r->set_state_mu);
     gpr_mu_init(&r->watcher_mu);
   }
+
   gpr_atm_rel_store(&r->refst, 1);
   gpr_atm_rel_store(&r->readst, NOT_READY);
   gpr_atm_rel_store(&r->writest, NOT_READY);
@@ -116,10 +116,9 @@ static void ref_by(grpc_fd *fd, int n) {
 static void unref_by(grpc_fd *fd, int n) {
   gpr_atm old = gpr_atm_full_fetch_add(&fd->refst, -n);
   if (old == n) {
-    close(fd->fd);
-    grpc_iomgr_add_callback(fd->on_done, fd->on_done_user_data);
+    grpc_iomgr_add_callback(&fd->on_done_closure);
     freelist_fd(fd);
-    grpc_iomgr_unref();
+    grpc_iomgr_unregister_object(&fd->iomgr_object);
   } else {
     GPR_ASSERT(old > n);
   }
@@ -138,9 +137,9 @@ void grpc_fd_global_shutdown(void) {
 
 static void do_nothing(void *ignored, int success) {}
 
-grpc_fd *grpc_fd_create(int fd) {
+grpc_fd *grpc_fd_create(int fd, const char *name) {
   grpc_fd *r = alloc_fd(fd);
-  grpc_iomgr_ref();
+  grpc_iomgr_register_object(&r->iomgr_object, name);
   grpc_pollset_add_fd(grpc_backup_pollset(), r);
   return r;
 }
@@ -180,8 +179,8 @@ static void wake_all_watchers_locked(grpc_fd *fd) {
 }
 
 void grpc_fd_orphan(grpc_fd *fd, grpc_iomgr_cb_func on_done, void *user_data) {
-  fd->on_done = on_done ? on_done : do_nothing;
-  fd->on_done_user_data = user_data;
+  grpc_iomgr_closure_init(&fd->on_done_closure, on_done ? on_done : do_nothing,
+                          user_data);
   shutdown(fd->fd, SHUT_RDWR);
   ref_by(fd, 1); /* remove active status, but keep referenced */
   gpr_mu_lock(&fd->watcher_mu);
@@ -195,21 +194,20 @@ void grpc_fd_ref(grpc_fd *fd) { ref_by(fd, 2); }
 
 void grpc_fd_unref(grpc_fd *fd) { unref_by(fd, 2); }
 
-static void make_callback(grpc_iomgr_cb_func cb, void *arg, int success,
+static void process_callback(grpc_iomgr_closure *closure, int success,
                           int allow_synchronous_callback) {
   if (allow_synchronous_callback) {
-    cb(arg, success);
+    closure->cb(closure->cb_arg, success);
   } else {
-    grpc_iomgr_add_delayed_callback(cb, arg, success);
+    grpc_iomgr_add_delayed_callback(closure, success);
   }
 }
 
-static void make_callbacks(grpc_iomgr_closure *callbacks, size_t n, int success,
-                           int allow_synchronous_callback) {
+static void process_callbacks(grpc_iomgr_closure *callbacks, size_t n,
+                              int success, int allow_synchronous_callback) {
   size_t i;
   for (i = 0; i < n; i++) {
-    make_callback(callbacks[i].cb, callbacks[i].cb_arg, success,
-                  allow_synchronous_callback);
+    process_callback(callbacks + i, success, allow_synchronous_callback);
   }
 }
 
@@ -234,10 +232,9 @@ static void notify_on(grpc_fd *fd, gpr_atm *st, grpc_iomgr_closure *closure,
     /* swap was unsuccessful due to an intervening set_ready call.
        Fall through to the READY code below */
     case READY:
-      assert(gpr_atm_no_barrier_load(st) == READY);
+      GPR_ASSERT(gpr_atm_no_barrier_load(st) == READY);
       gpr_atm_rel_store(st, NOT_READY);
-      make_callback(closure->cb, closure->cb_arg,
-                    !gpr_atm_acq_load(&fd->shutdown),
+      process_callback(closure, !gpr_atm_acq_load(&fd->shutdown),
                     allow_synchronous_callback);
       return;
     default: /* WAITING */
@@ -251,7 +248,7 @@ static void notify_on(grpc_fd *fd, gpr_atm *st, grpc_iomgr_closure *closure,
   abort();
 }
 
-static void set_ready_locked(gpr_atm *st, grpc_iomgr_closure *callbacks,
+static void set_ready_locked(gpr_atm *st, grpc_iomgr_closure **callbacks,
                              size_t *ncallbacks) {
   gpr_intptr state = gpr_atm_acq_load(st);
 
@@ -269,9 +266,9 @@ static void set_ready_locked(gpr_atm *st, grpc_iomgr_closure *callbacks,
          Fall through to the WAITING code below */
       state = gpr_atm_acq_load(st);
     default: /* waiting */
-      assert(gpr_atm_no_barrier_load(st) != READY &&
-             gpr_atm_no_barrier_load(st) != NOT_READY);
-      callbacks[(*ncallbacks)++] = *(grpc_iomgr_closure *)state;
+      GPR_ASSERT(gpr_atm_no_barrier_load(st) != READY &&
+                 gpr_atm_no_barrier_load(st) != NOT_READY);
+      callbacks[(*ncallbacks)++] = (grpc_iomgr_closure *)state;
       gpr_atm_rel_store(st, NOT_READY);
       return;
   }
@@ -282,25 +279,30 @@ static void set_ready(grpc_fd *fd, gpr_atm *st,
   /* only one set_ready can be active at once (but there may be a racing
      notify_on) */
   int success;
-  grpc_iomgr_closure cb;
+  grpc_iomgr_closure* closure;
   size_t ncb = 0;
+
   gpr_mu_lock(&fd->set_state_mu);
-  set_ready_locked(st, &cb, &ncb);
+  set_ready_locked(st, &closure, &ncb);
   gpr_mu_unlock(&fd->set_state_mu);
   success = !gpr_atm_acq_load(&fd->shutdown);
-  make_callbacks(&cb, ncb, success, allow_synchronous_callback);
+  GPR_ASSERT(ncb <= 1);
+  if (ncb > 0) {
+    process_callbacks(closure, ncb, success, allow_synchronous_callback);
+  }
 }
 
 void grpc_fd_shutdown(grpc_fd *fd) {
-  grpc_iomgr_closure cb[2];
   size_t ncb = 0;
   gpr_mu_lock(&fd->set_state_mu);
   GPR_ASSERT(!gpr_atm_no_barrier_load(&fd->shutdown));
   gpr_atm_rel_store(&fd->shutdown, 1);
-  set_ready_locked(&fd->readst, cb, &ncb);
-  set_ready_locked(&fd->writest, cb, &ncb);
+  set_ready_locked(&fd->readst, &fd->shutdown_closures[0], &ncb);
+  set_ready_locked(&fd->writest, &fd->shutdown_closures[0], &ncb);
   gpr_mu_unlock(&fd->set_state_mu);
-  make_callbacks(cb, ncb, 0, 0);
+  GPR_ASSERT(ncb <= 2);
+  process_callbacks(fd->shutdown_closures[0], ncb, 0 /* GPR_FALSE */,
+                    0 /* GPR_FALSE */);
 }
 
 void grpc_fd_notify_on_read(grpc_fd *fd, grpc_iomgr_closure *closure) {

src/core/iomgr/fd_posix.h

@@ -34,17 +34,12 @@
 #ifndef GRPC_INTERNAL_CORE_IOMGR_FD_POSIX_H
 #define GRPC_INTERNAL_CORE_IOMGR_FD_POSIX_H
 
-#include "src/core/iomgr/iomgr.h"
+#include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/pollset.h"
 #include <grpc/support/atm.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
 
-typedef struct {
-  grpc_iomgr_cb_func cb;
-  void *cb_arg;
-} grpc_iomgr_closure;
-
 typedef struct grpc_fd grpc_fd;
 
 typedef struct grpc_fd_watcher {
@@ -96,15 +91,18 @@ struct grpc_fd {
   gpr_atm readst;
   gpr_atm writest;
 
-  grpc_iomgr_cb_func on_done;
-  void *on_done_user_data;
   struct grpc_fd *freelist_next;
+
+  grpc_iomgr_closure on_done_closure;
+  grpc_iomgr_closure *shutdown_closures[2];
+
+  grpc_iomgr_object iomgr_object;
 };
 
 /* Create a wrapped file descriptor.
    Requires fd is a non-blocking file descriptor.
    This takes ownership of closing fd. */
-grpc_fd *grpc_fd_create(int fd);
+grpc_fd *grpc_fd_create(int fd, const char *name);
 
 /* Releases fd to be asynchronously destroyed.
    on_done is called when the underlying file descriptor is definitely close()d.

src/core/iomgr/iomgr.c

@@ -37,25 +37,19 @@
 
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/alarm_internal.h"
+#include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/sync.h>
 
-typedef struct delayed_callback {
-  grpc_iomgr_cb_func cb;
-  void *cb_arg;
-  int success;
-  struct delayed_callback *next;
-} delayed_callback;
-
 static gpr_mu g_mu;
 static gpr_cv g_rcv;
-static delayed_callback *g_cbs_head = NULL;
-static delayed_callback *g_cbs_tail = NULL;
+static grpc_iomgr_closure *g_cbs_head = NULL;
+static grpc_iomgr_closure *g_cbs_tail = NULL;
 static int g_shutdown;
-static int g_refs;
 static gpr_event g_background_callback_executor_done;
+static grpc_iomgr_object g_root_object;
 
 /* Execute followup callbacks continuously.
    Other threads may check in and help during pollset_work() */
@@ -66,12 +60,11 @@ static void background_callback_executor(void *ignored) {
     gpr_timespec short_deadline =
         gpr_time_add(gpr_now(), gpr_time_from_millis(100));
     if (g_cbs_head) {
-      delayed_callback *cb = g_cbs_head;
-      g_cbs_head = cb->next;
+      grpc_iomgr_closure *closure = g_cbs_head;
+      g_cbs_head = closure->next;
       if (!g_cbs_head) g_cbs_tail = NULL;
       gpr_mu_unlock(&g_mu);
-      cb->cb(cb->cb_arg, cb->success);
-      gpr_free(cb);
+      closure->cb(closure->cb_arg, closure->success);
       gpr_mu_lock(&g_mu);
     } else if (grpc_alarm_check(&g_mu, gpr_now(), &deadline)) {
     } else {
@@ -96,34 +89,48 @@ void grpc_iomgr_init(void) {
   gpr_mu_init(&g_mu);
   gpr_cv_init(&g_rcv);
   grpc_alarm_list_init(gpr_now());
-  g_refs = 0;
+  g_root_object.next = g_root_object.prev = &g_root_object;
+  g_root_object.name = "root";
   grpc_iomgr_platform_init();
   gpr_event_init(&g_background_callback_executor_done);
   gpr_thd_new(&id, background_callback_executor, NULL, NULL);
 }
 
+static size_t count_objects(void) {
+  grpc_iomgr_object *obj;
+  size_t n = 0;
+  for (obj = g_root_object.next; obj != &g_root_object; obj = obj->next) {
+    n++;
+  }
+  return n;
+}
+
 void grpc_iomgr_shutdown(void) {
-  delayed_callback *cb;
+  grpc_iomgr_object *obj;
+  grpc_iomgr_closure *closure;
   gpr_timespec shutdown_deadline =
       gpr_time_add(gpr_now(), gpr_time_from_seconds(10));
 
 
   gpr_mu_lock(&g_mu);
   g_shutdown = 1;
-  while (g_cbs_head || g_refs) {
-    gpr_log(GPR_DEBUG, "Waiting for %d iomgr objects to be destroyed%s", g_refs,
+  while (g_cbs_head || g_root_object.next != &g_root_object) {
+    size_t nobjs = count_objects();
+    gpr_log(GPR_DEBUG, "Waiting for %d iomgr objects to be destroyed%s", nobjs,
             g_cbs_head ? " and executing final callbacks" : "");
-    while (g_cbs_head) {
-      cb = g_cbs_head;
-      g_cbs_head = cb->next;
-      if (!g_cbs_head) g_cbs_tail = NULL;
-      gpr_mu_unlock(&g_mu);
-
-      cb->cb(cb->cb_arg, 0);
-      gpr_free(cb);
-      gpr_mu_lock(&g_mu);
+    if (g_cbs_head) {
+      do {
+        closure = g_cbs_head;
+        g_cbs_head = closure->next;
+        if (!g_cbs_head) g_cbs_tail = NULL;
+        gpr_mu_unlock(&g_mu);
+
+        closure->cb(closure->cb_arg, 0);
+        gpr_mu_lock(&g_mu);
+      } while (g_cbs_head);
+      continue;
     }
-    if (g_refs) {
+    if (nobjs > 0) {
       int timeout = 0;
       gpr_timespec short_deadline = gpr_time_add(gpr_now(),
                                                  gpr_time_from_millis(100));
@@ -137,7 +144,10 @@ void grpc_iomgr_shutdown(void) {
         gpr_log(GPR_DEBUG,
                 "Failed to free %d iomgr objects before shutdown deadline: "
                 "memory leaks are likely",
-                g_refs);
+                count_objects());
+        for (obj = g_root_object.next; obj != &g_root_object; obj = obj->next) {
+          gpr_log(GPR_DEBUG, "LEAKED OBJECT: %s", obj->name);
+        }
         break;
       }
     }
@@ -153,56 +163,66 @@ void grpc_iomgr_shutdown(void) {
   gpr_cv_destroy(&g_rcv);
 }
 
-void grpc_iomgr_ref(void) {
+void grpc_iomgr_register_object(grpc_iomgr_object *obj, const char *name) {
+  obj->name = gpr_strdup(name);
   gpr_mu_lock(&g_mu);
-  ++g_refs;
+  obj->next = &g_root_object;
+  obj->prev = obj->next->prev;
+  obj->next->prev = obj->prev->next = obj;
   gpr_mu_unlock(&g_mu);
 }
 
-void grpc_iomgr_unref(void) {
+void grpc_iomgr_unregister_object(grpc_iomgr_object *obj) {
+  gpr_free(obj->name);
   gpr_mu_lock(&g_mu);
-  if (0 == --g_refs) {
-    gpr_cv_signal(&g_rcv);
-  }
+  obj->next->prev = obj->prev;
+  obj->prev->next = obj->next;
+  gpr_cv_signal(&g_rcv);
   gpr_mu_unlock(&g_mu);
 }
 
-void grpc_iomgr_add_delayed_callback(grpc_iomgr_cb_func cb, void *cb_arg,
-                                     int success) {
-  delayed_callback *dcb = gpr_malloc(sizeof(delayed_callback));
-  dcb->cb = cb;
-  dcb->cb_arg = cb_arg;
-  dcb->success = success;
+
+void grpc_iomgr_closure_init(grpc_iomgr_closure *closure, grpc_iomgr_cb_func cb,
+                             void *cb_arg) {
+  closure->cb = cb;
+  closure->cb_arg = cb_arg;
+  closure->next = NULL;
+}
+
+void grpc_iomgr_add_delayed_callback(grpc_iomgr_closure *closure, int success) {
+  closure->success = success;
   gpr_mu_lock(&g_mu);
-  dcb->next = NULL;
+  closure->next = NULL;
   if (!g_cbs_tail) {
-    g_cbs_head = g_cbs_tail = dcb;
+    g_cbs_head = g_cbs_tail = closure;
   } else {
-    g_cbs_tail->next = dcb;
-    g_cbs_tail = dcb;
+    g_cbs_tail->next = closure;
+    g_cbs_tail = closure;
   }
   gpr_mu_unlock(&g_mu);
 }
 
-void grpc_iomgr_add_callback(grpc_iomgr_cb_func cb, void *cb_arg) {
-  grpc_iomgr_add_delayed_callback(cb, cb_arg, 1);
+
+void grpc_iomgr_add_callback(grpc_iomgr_closure *closure) {
+  grpc_iomgr_add_delayed_callback(closure, 1 /* GPR_TRUE */);
 }
 
+
 int grpc_maybe_call_delayed_callbacks(gpr_mu *drop_mu, int success) {
   int n = 0;
   gpr_mu *retake_mu = NULL;
-  delayed_callback *cb;
+  grpc_iomgr_closure *closure;
   for (;;) {
     /* check for new work */
     if (!gpr_mu_trylock(&g_mu)) {
       break;
     }
-    cb = g_cbs_head;
-    if (!cb) {
+    closure = g_cbs_head;
+    if (!closure) {
       gpr_mu_unlock(&g_mu);
       break;
     }
-    g_cbs_head = cb->next;
+    g_cbs_head = closure->next;
     if (!g_cbs_head) g_cbs_tail = NULL;
     gpr_mu_unlock(&g_mu);
     /* if we have a mutex to drop, do so before executing work */
@@ -211,8 +231,7 @@ int grpc_maybe_call_delayed_callbacks(gpr_mu *drop_mu, int success) {
       retake_mu = drop_mu;
       drop_mu = NULL;
     }
-    cb->cb(cb->cb_arg, success && cb->success);
-    gpr_free(cb);
+    closure->cb(closure->cb_arg, success && closure->success);
     n++;
   }
   if (retake_mu) {

src/core/iomgr/iomgr.h

@@ -34,14 +34,43 @@
 #ifndef GRPC_INTERNAL_CORE_IOMGR_IOMGR_H
 #define GRPC_INTERNAL_CORE_IOMGR_IOMGR_H
 
-/* gRPC Callback definition */
+/** gRPC Callback definition.
+ *
+ * \param arg Arbitrary input.
+ * \param success An indication on the state of the iomgr. On false, cleanup
+ * actions should be taken (eg, shutdown). */
 typedef void (*grpc_iomgr_cb_func)(void *arg, int success);
 
+/** A closure over a grpc_iomgr_cb_func. */
+typedef struct grpc_iomgr_closure {
+  /** Bound callback. */
+  grpc_iomgr_cb_func cb;
+
+  /** Arguments to be passed to "cb". */
+  void *cb_arg;
+
+  /** Internal. A boolean indication to "cb" on the state of the iomgr.
+   * For instance, closures created during a shutdown would have this field set
+   * to false. */
+  int success;
+
+  /**< Internal. Do not touch */
+  struct grpc_iomgr_closure *next;
+} grpc_iomgr_closure;
+
+/** Initializes \a closure with \a cb and \a cb_arg. */
+void grpc_iomgr_closure_init(grpc_iomgr_closure *closure, grpc_iomgr_cb_func cb,
+                             void *cb_arg);
+
+/** Initializes the iomgr. */
 void grpc_iomgr_init(void);
+
+/** Signals the intention to shutdown the iomgr. */
 void grpc_iomgr_shutdown(void);
 
-/* This function is called from within a callback or from anywhere else
-   and causes the invocation of a callback at some point in the future */
-void grpc_iomgr_add_callback(grpc_iomgr_cb_func cb, void *cb_arg);
+/** Registers a closure to be invoked at some point in the future.
+ *
+ * Can be called from within a callback or from anywhere else */
+void grpc_iomgr_add_callback(grpc_iomgr_closure *closure);
 
 #endif  /* GRPC_INTERNAL_CORE_IOMGR_IOMGR_H */

src/core/iomgr/iomgr_internal.h

@@ -35,15 +35,19 @@
 #define GRPC_INTERNAL_CORE_IOMGR_IOMGR_INTERNAL_H
 
 #include "src/core/iomgr/iomgr.h"
-#include "src/core/iomgr/iomgr_internal.h"
 #include <grpc/support/sync.h>
 
+typedef struct grpc_iomgr_object {
+  char *name;
+  struct grpc_iomgr_object *next;
+  struct grpc_iomgr_object *prev;
+} grpc_iomgr_object;
+
 int grpc_maybe_call_delayed_callbacks(gpr_mu *drop_mu, int success);
-void grpc_iomgr_add_delayed_callback(grpc_iomgr_cb_func cb, void *cb_arg,
-                                     int success);
+void grpc_iomgr_add_delayed_callback(grpc_iomgr_closure *iocb, int success);
 
-void grpc_iomgr_ref(void);
-void grpc_iomgr_unref(void);
+void grpc_iomgr_register_object(grpc_iomgr_object *obj, const char *name);
+void grpc_iomgr_unregister_object(grpc_iomgr_object *obj);
 
 void grpc_iomgr_platform_init(void);
 void grpc_iomgr_platform_shutdown(void);

src/core/iomgr/pollset_posix.c

@@ -272,6 +272,7 @@ typedef struct grpc_unary_promote_args {
   const grpc_pollset_vtable *original_vtable;
   grpc_pollset *pollset;
   grpc_fd *fd;
+  grpc_iomgr_closure promotion_closure;
 } grpc_unary_promote_args;
 
 static void unary_poll_do_promote(void *args, int success) {
@@ -294,7 +295,7 @@ static void unary_poll_do_promote(void *args, int success) {
   /* First we need to ensure that nobody is polling concurrently */
   while (pollset->counter != 0) {
     grpc_pollset_kick(pollset);
-    grpc_iomgr_add_callback(unary_poll_do_promote, up_args);
+    grpc_iomgr_add_callback(&up_args->promotion_closure);
     gpr_mu_unlock(&pollset->mu);
     return;
   }
@@ -378,7 +379,9 @@ static void unary_poll_pollset_add_fd(grpc_pollset *pollset, grpc_fd *fd) {
   up_args->pollset = pollset;
   up_args->fd = fd;
   up_args->original_vtable = pollset->vtable;
-  grpc_iomgr_add_callback(unary_poll_do_promote, up_args);
+  up_args->promotion_closure.cb = unary_poll_do_promote;
+  up_args->promotion_closure.cb_arg = up_args;
+  grpc_iomgr_add_callback(&up_args->promotion_closure);
 
   grpc_pollset_kick(pollset);
 }

src/core/iomgr/pollset_windows.c

@@ -66,15 +66,15 @@ int grpc_pollset_work(grpc_pollset *pollset, gpr_timespec deadline) {
   gpr_timespec now;
   now = gpr_now();
   if (gpr_time_cmp(now, deadline) > 0) {
-    return 0;
+    return 0 /* GPR_FALSE */;
   }
-  if (grpc_maybe_call_delayed_callbacks(NULL, 1)) {
-    return 1;
+  if (grpc_maybe_call_delayed_callbacks(NULL, 1 /* GPR_TRUE */)) {
+    return 1 /* GPR_TRUE */;
   }
   if (grpc_alarm_check(NULL, now, &deadline)) {
-    return 1;
+    return 1 /* GPR_TRUE */;
   }
-  return 0;
+  return 0 /* GPR_FALSE */;
 }
 
 void grpc_pollset_kick(grpc_pollset *p) { }

src/core/iomgr/resolve_address_posix.c

@@ -55,6 +55,7 @@ typedef struct {
   char *default_port;
   grpc_resolve_cb cb;
   void *arg;
+  grpc_iomgr_object iomgr_object;
 } request;
 
 grpc_resolved_addresses *grpc_blocking_resolve_address(
@@ -153,9 +154,9 @@ static void do_request(void *rp) {
   grpc_resolve_cb cb = r->cb;
   gpr_free(r->name);
   gpr_free(r->default_port);
+  grpc_iomgr_unregister_object(&r->iomgr_object);
   gpr_free(r);
   cb(arg, resolved);
-  grpc_iomgr_unref();
 }
 
 void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
@@ -166,14 +167,17 @@ void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
 void grpc_resolve_address(const char *name, const char *default_port,
                           grpc_resolve_cb cb, void *arg) {
   request *r = gpr_malloc(sizeof(request));
-  /*gpr_thd_id id;*/
-  grpc_iomgr_ref();
+  gpr_thd_id id;
+  char *tmp;
+  gpr_asprintf(&tmp, "resolve_address:name='%s':default_port='%s'", name,
+               default_port);
+  grpc_iomgr_register_object(&r->iomgr_object, tmp);
+  gpr_free(tmp);
   r->name = gpr_strdup(name);
   r->default_port = gpr_strdup(default_port);
   r->cb = cb;
   r->arg = arg;
-  /*gpr_thd_new(&id, do_request, r, NULL);*/
-  do_request(r);
+  gpr_thd_new(&id, do_request, r, NULL);
 }
 
 #endif

src/core/iomgr/resolve_address_windows.c

@@ -54,6 +54,7 @@ typedef struct {
   char *default_port;
   grpc_resolve_cb cb;
   void *arg;
+  grpc_iomgr_object iomgr_object;
 } request;
 
 grpc_resolved_addresses *grpc_blocking_resolve_address(
@@ -135,7 +136,7 @@ static void do_request(void *rp) {
   gpr_free(r->default_port);
   gpr_free(r);
   cb(arg, resolved);
-  grpc_iomgr_unref();
+  grpc_iomgr_unregister_object(&r->iomgr_object);
 }
 
 void grpc_resolved_addresses_destroy(grpc_resolved_addresses *addrs) {
@@ -147,7 +148,10 @@ void grpc_resolve_address(const char *name, const char *default_port,
                           grpc_resolve_cb cb, void *arg) {
   request *r = gpr_malloc(sizeof(request));
   gpr_thd_id id;
-  grpc_iomgr_ref();
+  const char *label;
+  gpr_asprintf(&label, "resolve:%s", name);
+  grpc_iomgr_register_object(&r->iomgr_object, label);
+  gpr_free(label);
   r->name = gpr_strdup(name);
   r->default_port = gpr_strdup(default_port);
   r->cb = cb;

src/core/iomgr/socket_windows.c

@@ -39,18 +39,17 @@
 #include <grpc/support/log.h>
 
 #include "src/core/iomgr/iocp_windows.h"
-#include "src/core/iomgr/iomgr.h"
 #include "src/core/iomgr/iomgr_internal.h"
 #include "src/core/iomgr/pollset.h"
 #include "src/core/iomgr/pollset_windows.h"
 #include "src/core/iomgr/socket_windows.h"
 
-grpc_winsocket *grpc_winsocket_create(SOCKET socket) {
+grpc_winsocket *grpc_winsocket_create(SOCKET socket, const char *name) {
   grpc_winsocket *r = gpr_malloc(sizeof(grpc_winsocket));
   memset(r, 0, sizeof(grpc_winsocket));
   r->socket = socket;
   gpr_mu_init(&r->state_mu);
-  grpc_iomgr_ref();
+  grpc_iomgr_register_object(&r->iomgr_object, name);
   grpc_iocp_add_socket(r);
   return r;
 }
@@ -64,13 +63,15 @@ int grpc_winsocket_shutdown(grpc_winsocket *socket) {
   gpr_mu_lock(&socket->state_mu);
   if (socket->read_info.cb) {
     callbacks_set++;
-    grpc_iomgr_add_delayed_callback(socket->read_info.cb,
-                                    socket->read_info.opaque, 0);
+    grpc_iomgr_closure_init(&socket->shutdown_closure, socket->read_info.cb,
+                            socket->read_info.opaque);
+    grpc_iomgr_add_delayed_callback(&socket->shutdown_closure, 0);
   }
   if (socket->write_info.cb) {
     callbacks_set++;
-    grpc_iomgr_add_delayed_callback(socket->write_info.cb,
-                                    socket->write_info.opaque, 0);
+    grpc_iomgr_closure_init(&socket->shutdown_closure, socket->write_info.cb,
+                            socket->write_info.opaque);
+    grpc_iomgr_add_delayed_callback(&socket->shutdown_closure, 0);
   }
   gpr_mu_unlock(&socket->state_mu);
   return callbacks_set;
@@ -90,7 +91,7 @@ void grpc_winsocket_orphan(grpc_winsocket *winsocket) {
     grpc_winsocket_destroy(winsocket);
   }
   closesocket(socket);
-  grpc_iomgr_unref();
+  grpc_iomgr_unregister_object(&winsocket->iomgr_object);
 }
 
 void grpc_winsocket_destroy(grpc_winsocket *winsocket) {

src/core/iomgr/socket_windows.h

@@ -39,6 +39,8 @@
 #include <grpc/support/sync.h>
 #include <grpc/support/atm.h>
 
+#include "src/core/iomgr/iomgr_internal.h"
+
 /* This holds the data for an outstanding read or write on a socket.
    The mutex to protect the concurrent access to that data is the one
    inside the winsocket wrapper. */
@@ -93,11 +95,16 @@ typedef struct grpc_winsocket {
      there is a pending operation that the IO Completion Port will have to
      wait for. The socket will be collected at that time. */
   int orphan;
+
+  grpc_iomgr_closure shutdown_closure;
+
+  /* A label for iomgr to track outstanding objects */
+  grpc_iomgr_object iomgr_object;
 } grpc_winsocket;
 
 /* Create a wrapped windows handle. This takes ownership of it, meaning that
    it will be responsible for closing it. */
-grpc_winsocket *grpc_winsocket_create(SOCKET socket);
+grpc_winsocket *grpc_winsocket_create(SOCKET socket, const char *name);
 
 /* Initiate an asynchronous shutdown of the socket. Will call off any pending
    operation to cancel them. Returns the number of callbacks that got setup. */

src/core/iomgr/tcp_client_posix.c

@@ -48,6 +48,7 @@
 #include "src/core/iomgr/sockaddr_utils.h"
 #include "src/core/iomgr/socket_utils_posix.h"
 #include "src/core/iomgr/tcp_posix.h"
+#include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/time.h>
@@ -185,6 +186,8 @@ void grpc_tcp_client_connect(void (*cb)(void *arg, grpc_endpoint *ep),
   async_connect *ac;
   struct sockaddr_in6 addr6_v4mapped;
   struct sockaddr_in addr4_copy;
+  char *name;
+  char *addr_str;
 
   /* Use dualstack sockets where available. */
   if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
@@ -211,24 +214,27 @@ void grpc_tcp_client_connect(void (*cb)(void *arg, grpc_endpoint *ep),
     err = connect(fd, addr, addr_len);
   } while (err < 0 && errno == EINTR);
 
+  grpc_sockaddr_to_string(&addr_str, addr, 1);
+  gpr_asprintf(&name, "tcp-client:%s", addr_str);
+
   if (err >= 0) {
     gpr_log(GPR_DEBUG, "instant connect");
-    cb(arg,
-       grpc_tcp_create(grpc_fd_create(fd), GRPC_TCP_DEFAULT_READ_SLICE_SIZE));
-    return;
+    cb(arg, grpc_tcp_create(grpc_fd_create(fd, name),
+                            GRPC_TCP_DEFAULT_READ_SLICE_SIZE));
+    goto done;
   }
 
   if (errno != EWOULDBLOCK && errno != EINPROGRESS) {
-    gpr_log(GPR_ERROR, "connect error: %s", strerror(errno));
+    gpr_log(GPR_ERROR, "connect error to '%s': %s", addr_str, strerror(errno));
     close(fd);
     cb(arg, NULL);
-    return;
+    goto done;
   }
 
   ac = gpr_malloc(sizeof(async_connect));
   ac->cb = cb;
   ac->cb_arg = arg;
-  ac->fd = grpc_fd_create(fd);
+  ac->fd = grpc_fd_create(fd, name);
   gpr_mu_init(&ac->mu);
   ac->refs = 2;
   ac->write_closure.cb = on_writable;
@@ -236,6 +242,10 @@ void grpc_tcp_client_connect(void (*cb)(void *arg, grpc_endpoint *ep),
 
   grpc_alarm_init(&ac->alarm, deadline, on_alarm, ac, gpr_now());
   grpc_fd_notify_on_write(ac->fd, &ac->write_closure);
+
+done:
+  gpr_free(name);
+  gpr_free(addr_str);
 }
 
 #endif

src/core/iomgr/tcp_client_windows.c

@@ -193,7 +193,7 @@ void grpc_tcp_client_connect(void(*cb)(void *arg, grpc_endpoint *tcp),
     goto failure;
   }
 
-  socket = grpc_winsocket_create(sock);
+  socket = grpc_winsocket_create(sock, "client");
   info = &socket->write_info;
   info->outstanding = 1;
   success = ConnectEx(sock, addr, addr_len, NULL, 0, NULL, &info->overlapped);

src/core/iomgr/tcp_posix.c

@@ -280,6 +280,8 @@ typedef struct {
 
   grpc_iomgr_closure read_closure;
   grpc_iomgr_closure write_closure;
+
+  grpc_iomgr_closure handle_read_closure;
 } grpc_tcp;
 
 static void grpc_tcp_handle_read(void *arg /* grpc_tcp */, int success);
@@ -443,7 +445,8 @@ static void grpc_tcp_notify_on_read(grpc_endpoint *ep, grpc_endpoint_read_cb cb,
     tcp->finished_edge = 0;
     grpc_fd_notify_on_read(tcp->em_fd, &tcp->read_closure);
   } else {
-    grpc_iomgr_add_callback(grpc_tcp_handle_read, tcp);
+    tcp->handle_read_closure.cb_arg = tcp;
+    grpc_iomgr_add_callback(&tcp->handle_read_closure);
   }
 }
 
@@ -592,6 +595,8 @@ grpc_endpoint *grpc_tcp_create(grpc_fd *em_fd, size_t slice_size) {
   tcp->read_closure.cb_arg = tcp;
   tcp->write_closure.cb = grpc_tcp_handle_write;
   tcp->write_closure.cb_arg = tcp;
+
+  tcp->handle_read_closure.cb = grpc_tcp_handle_read;
   return &tcp->base;
 }
 

src/core/iomgr/tcp_server_posix.c

@@ -60,6 +60,7 @@
 #include "src/core/iomgr/sockaddr_utils.h"
 #include "src/core/iomgr/socket_utils_posix.h"
 #include "src/core/iomgr/tcp_posix.h"
+#include "src/core/support/string.h"
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/sync.h>
@@ -281,6 +282,8 @@ static void on_read(void *arg, int success) {
   for (;;) {
     struct sockaddr_storage addr;
     socklen_t addrlen = sizeof(addr);
+    char *addr_str;
+    char *name;
     /* Note: If we ever decide to return this address to the user, remember to
              strip off the ::ffff:0.0.0.0/96 prefix first. */
     int fd = grpc_accept4(sp->fd, (struct sockaddr *)&addr, &addrlen, 1, 1);
@@ -299,9 +302,15 @@ static void on_read(void *arg, int success) {
 
     grpc_set_socket_no_sigpipe_if_possible(fd);
 
-    sp->server->cb(
-        sp->server->cb_arg,
-        grpc_tcp_create(grpc_fd_create(fd), GRPC_TCP_DEFAULT_READ_SLICE_SIZE));
+    grpc_sockaddr_to_string(&addr_str, (struct sockaddr *)&addr, 1);
+    gpr_asprintf(&name, "tcp-server-connection:%s", addr_str);
+
+    sp->server->cb(sp->server->cb_arg,
+                   grpc_tcp_create(grpc_fd_create(fd, name),
+                                   GRPC_TCP_DEFAULT_READ_SLICE_SIZE));
+
+    gpr_free(addr_str);
+    gpr_free(name);
   }
 
   abort();
@@ -318,9 +327,13 @@ static int add_socket_to_server(grpc_tcp_server *s, int fd,
                                 const struct sockaddr *addr, int addr_len) {
   server_port *sp;
   int port;
+  char *addr_str;
+  char *name;
 
   port = prepare_socket(fd, addr, addr_len);
   if (port >= 0) {
+    grpc_sockaddr_to_string(&addr_str, (struct sockaddr *)&addr, 1);
+    gpr_asprintf(&name, "tcp-server-listener:%s", addr_str);
     gpr_mu_lock(&s->mu);
     GPR_ASSERT(!s->cb && "must add ports before starting server");
     /* append it to the list under a lock */
@@ -331,11 +344,13 @@ static int add_socket_to_server(grpc_tcp_server *s, int fd,
     sp = &s->ports[s->nports++];
     sp->server = s;
     sp->fd = fd;
-    sp->emfd = grpc_fd_create(fd);
+    sp->emfd = grpc_fd_create(fd, name);
     memcpy(sp->addr.untyped, addr, addr_len);
     sp->addr_len = addr_len;
     GPR_ASSERT(sp->emfd);
     gpr_mu_unlock(&s->mu);
+    gpr_free(addr_str);
+    gpr_free(name);
   }
 
   return port;

src/core/iomgr/tcp_server_windows.c

@@ -270,7 +270,8 @@ static void on_accept(void *arg, int from_iocp) {
       gpr_free(utf8_message);
       closesocket(sock);
     } else {
-      ep = grpc_tcp_create(grpc_winsocket_create(sock));
+	  /* TODO(ctiller): add sockaddr address to label */
+      ep = grpc_tcp_create(grpc_winsocket_create(sock, "server"));
     }
   } else {
     /* If we're not notified from the IOCP, it means we are asked to shutdown.
@@ -336,7 +337,7 @@ static int add_socket_to_server(grpc_tcp_server *s, SOCKET sock,
     }
     sp = &s->ports[s->nports++];
     sp->server = s;
-    sp->socket = grpc_winsocket_create(sock);
+    sp->socket = grpc_winsocket_create(sock, "listener");
     sp->shutting_down = 0;
     sp->AcceptEx = AcceptEx;
     sp->new_socket = INVALID_SOCKET;

src/core/security/credentials.c

@@ -54,6 +54,7 @@
 typedef struct {
   grpc_credentials *creds;
   grpc_credentials_metadata_cb cb;
+  grpc_iomgr_closure *on_simulated_token_fetch_done_closure;
   void *user_data;
 } grpc_credentials_metadata_request;
 
@@ -65,6 +66,8 @@ grpc_credentials_metadata_request_create(grpc_credentials *creds,
       gpr_malloc(sizeof(grpc_credentials_metadata_request));
   r->creds = grpc_credentials_ref(creds);
   r->cb = cb;
+  r->on_simulated_token_fetch_done_closure =
+      gpr_malloc(sizeof(grpc_iomgr_closure));
   r->user_data = user_data;
   return r;
 }
@@ -72,6 +75,7 @@ grpc_credentials_metadata_request_create(grpc_credentials *creds,
 static void grpc_credentials_metadata_request_destroy(
     grpc_credentials_metadata_request *r) {
   grpc_credentials_unref(r->creds);
+  gpr_free(r->on_simulated_token_fetch_done_closure);
   gpr_free(r);
 }
 
@@ -831,9 +835,11 @@ static void fake_oauth2_get_request_metadata(grpc_credentials *creds,
   grpc_fake_oauth2_credentials *c = (grpc_fake_oauth2_credentials *)creds;
 
   if (c->is_async) {
-    grpc_iomgr_add_callback(
-        on_simulated_token_fetch_done,
-        grpc_credentials_metadata_request_create(creds, cb, user_data));
+    grpc_credentials_metadata_request *cb_arg =
+        grpc_credentials_metadata_request_create(creds, cb, user_data);
+    grpc_iomgr_closure_init(cb_arg->on_simulated_token_fetch_done_closure,
+                            on_simulated_token_fetch_done, cb_arg);
+    grpc_iomgr_add_callback(cb_arg->on_simulated_token_fetch_done_closure);
   } else {
     cb(user_data, c->access_token_md->entries, 1, GRPC_CREDENTIALS_OK);
   }

src/core/surface/call.c

@@ -31,6 +31,7 @@
  *
  */
 
+#include "src/core/census/grpc_context.h"
 #include "src/core/surface/call.h"
 #include "src/core/channel/channel_stack.h"
 #include "src/core/iomgr/alarm.h"
@@ -226,6 +227,7 @@ struct grpc_call {
 
   gpr_slice_buffer incoming_message;
   gpr_uint32 incoming_message_length;
+  grpc_iomgr_closure destroy_closure;
 };
 
 #define CALL_STACK_FROM_CALL(call) ((grpc_call_stack *)((call) + 1))
@@ -242,9 +244,9 @@ static int fill_send_ops(grpc_call *call, grpc_transport_op *op);
 static void execute_op(grpc_call *call, grpc_transport_op *op);
 static void recv_metadata(grpc_call *call, grpc_metadata_batch *metadata);
 static void finish_read_ops(grpc_call *call);
-static grpc_call_error cancel_with_status(
-    grpc_call *c, grpc_status_code status, const char *description,
-    gpr_uint8 locked);
+static grpc_call_error cancel_with_status(grpc_call *c, grpc_status_code status,
+                                          const char *description,
+                                          gpr_uint8 locked);
 
 grpc_call *grpc_call_create(grpc_channel *channel, grpc_completion_queue *cq,
                             const void *server_transport_data,
@@ -268,6 +270,8 @@ grpc_call *grpc_call_create(grpc_channel *channel, grpc_completion_queue *cq,
   if (call->is_client) {
     call->request_set[GRPC_IOREQ_SEND_TRAILING_METADATA] = REQSET_DONE;
     call->request_set[GRPC_IOREQ_SEND_STATUS] = REQSET_DONE;
+    call->context[GRPC_CONTEXT_TRACING].value = grpc_census_context_create();
+    call->context[GRPC_CONTEXT_TRACING].destroy = grpc_census_context_destroy;
   }
   GPR_ASSERT(add_initial_metadata_count < MAX_SEND_INITIAL_METADATA_COUNT);
   for (i = 0; i < add_initial_metadata_count; i++) {
@@ -367,7 +371,9 @@ void grpc_call_internal_unref(grpc_call *c, int allow_immediate_deletion) {
     if (allow_immediate_deletion) {
       destroy_call(c, 1);
     } else {
-      grpc_iomgr_add_callback(destroy_call, c);
+      c->destroy_closure.cb = destroy_call;
+      c->destroy_closure.cb_arg = c;
+      grpc_iomgr_add_callback(&c->destroy_closure);
     }
   }
 }
@@ -403,7 +409,8 @@ static void lock(grpc_call *call) { gpr_mu_lock(&call->mu); }
 static int need_more_data(grpc_call *call) {
   if (call->read_state == READ_STATE_STREAM_CLOSED) return 0;
   return is_op_live(call, GRPC_IOREQ_RECV_INITIAL_METADATA) ||
-         (is_op_live(call, GRPC_IOREQ_RECV_MESSAGE) && grpc_bbq_empty(&call->incoming_queue)) ||
+         (is_op_live(call, GRPC_IOREQ_RECV_MESSAGE) &&
+          grpc_bbq_empty(&call->incoming_queue)) ||
          is_op_live(call, GRPC_IOREQ_RECV_TRAILING_METADATA) ||
          is_op_live(call, GRPC_IOREQ_RECV_STATUS) ||
          is_op_live(call, GRPC_IOREQ_RECV_STATUS_DETAILS) ||
@@ -556,13 +563,13 @@ static void finish_live_ioreq_op(grpc_call *call, grpc_ioreq_op op,
           break;
         case GRPC_IOREQ_RECV_INITIAL_METADATA:
           GPR_SWAP(grpc_metadata_array, call->buffered_metadata[0],
-               *call->request_data[GRPC_IOREQ_RECV_INITIAL_METADATA]
-                    .recv_metadata);
+                   *call->request_data[GRPC_IOREQ_RECV_INITIAL_METADATA]
+                        .recv_metadata);
           break;
         case GRPC_IOREQ_RECV_TRAILING_METADATA:
           GPR_SWAP(grpc_metadata_array, call->buffered_metadata[1],
-               *call->request_data[GRPC_IOREQ_RECV_TRAILING_METADATA]
-                    .recv_metadata);
+                   *call->request_data[GRPC_IOREQ_RECV_TRAILING_METADATA]
+                        .recv_metadata);
           break;
         case GRPC_IOREQ_OP_COUNT:
           abort();
@@ -676,9 +683,8 @@ static int add_slice_to_message(grpc_call *call, gpr_slice slice) {
   }
   /* we have to be reading a message to know what to do here */
   if (!call->reading_message) {
-    cancel_with_status(
-        call, GRPC_STATUS_INVALID_ARGUMENT,
-        "Received payload data while not reading a message", 1);
+    cancel_with_status(call, GRPC_STATUS_INVALID_ARGUMENT,
+                       "Received payload data while not reading a message", 1);
     return 0;
   }
   /* append the slice to the incoming buffer */
@@ -1025,9 +1031,9 @@ grpc_call_error grpc_call_cancel_with_status(grpc_call *c,
   return cancel_with_status(c, status, description, 0);
 }
 
-static grpc_call_error cancel_with_status(
-    grpc_call *c, grpc_status_code status, const char *description,
-    gpr_uint8 locked) {
+static grpc_call_error cancel_with_status(grpc_call *c, grpc_status_code status,
+                                          const char *description,
+                                          gpr_uint8 locked) {
   grpc_transport_op op;
   grpc_mdstr *details =
       description ? grpc_mdstr_from_string(c->metadata_context, description)
@@ -1294,12 +1300,11 @@ grpc_call_error grpc_call_start_batch(grpc_call *call, const grpc_op *ops,
 
   grpc_cq_begin_op(call->cq, call);
 
-  return grpc_call_start_ioreq_and_call_back(call, reqs, out, finish_func,
-                                             tag);
+  return grpc_call_start_ioreq_and_call_back(call, reqs, out, finish_func, tag);
 }
 
-void grpc_call_context_set(grpc_call *call, grpc_context_index elem, void *value,
-                           void (*destroy)(void *value)) {
+void grpc_call_context_set(grpc_call *call, grpc_context_index elem,
+                           void *value, void (*destroy)(void *value)) {
   if (call->context[elem].destroy) {
     call->context[elem].destroy(call->context[elem].value);
   }

src/core/surface/channel.c

@@ -61,6 +61,7 @@ struct grpc_channel {
 
   gpr_mu registered_call_mu;
   registered_call *registered_calls;
+  grpc_iomgr_closure destroy_closure;
 };
 
 #define CHANNEL_STACK_FROM_CHANNEL(c) ((grpc_channel_stack *)((c) + 1))
@@ -193,7 +194,9 @@ static void destroy_channel(void *p, int ok) {
 
 void grpc_channel_internal_unref(grpc_channel *channel) {
   if (gpr_unref(&channel->refs)) {
-    grpc_iomgr_add_callback(destroy_channel, channel);
+    channel->destroy_closure.cb = destroy_channel;
+    channel->destroy_closure.cb_arg = channel;
+    grpc_iomgr_add_callback(&channel->destroy_closure);
   }
 }
 

src/core/surface/channel_create.c

@@ -195,9 +195,10 @@ grpc_channel *grpc_channel_create(const char *target,
   const grpc_channel_filter *filters[MAX_FILTERS];
   int n = 0;
   filters[n++] = &grpc_client_surface_filter;
+  /* TODO(census)
   if (grpc_channel_args_is_census_enabled(args)) {
     filters[n++] = &grpc_client_census_filter;
-  }
+    } */
   filters[n++] = &grpc_client_channel_filter;
   GPR_ASSERT(n <= MAX_FILTERS);
   channel = grpc_channel_create_from_filters(filters, n, args, mdctx, 1);

src/core/surface/init.c

@@ -31,11 +31,11 @@
  *
  */
 
+#include <grpc/census.h>
 #include <grpc/grpc.h>
 #include "src/core/channel/channel_stack.h"
 #include "src/core/debug/trace.h"
 #include "src/core/iomgr/iomgr.h"
-#include "src/core/statistics/census_interface.h"
 #include "src/core/profiling/timers.h"
 #include "src/core/surface/call.h"
 #include "src/core/surface/init.h"
@@ -64,7 +64,9 @@ void grpc_init(void) {
     grpc_security_pre_init();
     grpc_iomgr_init();
     grpc_tracer_init("GRPC_TRACE");
-    census_init();
+    if (census_initialize(CENSUS_NONE)) {
+      gpr_log(GPR_ERROR, "Could not initialize census.");
+    }
     grpc_timers_global_init();
   }
   gpr_mu_unlock(&g_init_mu);

src/core/surface/secure_channel_create.c

@@ -234,9 +234,10 @@ grpc_channel *grpc_secure_channel_create(grpc_credentials *creds,
       new_args_from_connector != NULL ? new_args_from_connector : args,
       &connector_arg);
   filters[n++] = &grpc_client_surface_filter;
+  /* TODO(census)
   if (grpc_channel_args_is_census_enabled(args)) {
     filters[n++] = &grpc_client_census_filter;
-  }
+    } */
   filters[n++] = &grpc_client_channel_filter;
   GPR_ASSERT(n <= MAX_FILTERS);
   channel = grpc_channel_create_from_filters(filters, n, args_copy, mdctx, 1);

src/core/surface/server.c

@@ -122,6 +122,8 @@ struct channel_data {
   channel_registered_method *registered_methods;
   gpr_uint32 registered_method_slots;
   gpr_uint32 registered_method_max_probes;
+  grpc_iomgr_closure finish_shutdown_channel_closure;
+  grpc_iomgr_closure finish_destroy_channel_closure;
 };
 
 typedef struct shutdown_tag {
@@ -183,6 +185,8 @@ struct call_data {
   void (*on_done_recv)(void *user_data, int success);
   void *recv_user_data;
 
+  grpc_iomgr_closure kill_zombie_closure;
+
   call_data **root[CALL_LIST_COUNT];
   call_link links[CALL_LIST_COUNT];
 };
@@ -312,7 +316,9 @@ static void destroy_channel(channel_data *chand) {
   GPR_ASSERT(chand->server != NULL);
   orphan_channel(chand);
   server_ref(chand->server);
-  grpc_iomgr_add_callback(finish_destroy_channel, chand);
+  chand->finish_destroy_channel_closure.cb = finish_destroy_channel;
+  chand->finish_destroy_channel_closure.cb_arg = chand;
+  grpc_iomgr_add_callback(&chand->finish_destroy_channel_closure);
 }
 
 static void finish_start_new_rpc_and_unlock(grpc_server *server,
@@ -444,7 +450,8 @@ static void server_on_recv(void *ptr, int success) {
       gpr_mu_lock(&chand->server->mu);
       if (calld->state == NOT_STARTED) {
         calld->state = ZOMBIED;
-        grpc_iomgr_add_callback(kill_zombie, elem);
+        grpc_iomgr_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
+        grpc_iomgr_add_callback(&calld->kill_zombie_closure);
       }
       gpr_mu_unlock(&chand->server->mu);
       break;
@@ -452,11 +459,14 @@ static void server_on_recv(void *ptr, int success) {
       gpr_mu_lock(&chand->server->mu);
       if (calld->state == NOT_STARTED) {
         calld->state = ZOMBIED;
-        grpc_iomgr_add_callback(kill_zombie, elem);
+        grpc_iomgr_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
+        grpc_iomgr_add_callback(&calld->kill_zombie_closure);
       } else if (calld->state == PENDING) {
         call_list_remove(calld, PENDING_START);
         calld->state = ZOMBIED;
-        grpc_iomgr_add_callback(kill_zombie, elem);
+        grpc_iomgr_closure_init(&calld->kill_zombie_closure, kill_zombie, elem);
+        grpc_iomgr_add_callback(&calld->kill_zombie_closure);
+
       }
       if (call_list_remove(calld, ALL_CALLS)) {
         maybe_finish_shutdown(chand->server);
@@ -533,7 +543,9 @@ static void finish_shutdown_channel(void *cd, int success) {
 
 static void shutdown_channel(channel_data *chand) {
   grpc_channel_internal_ref(chand->channel);
-  grpc_iomgr_add_callback(finish_shutdown_channel, chand);
+  chand->finish_shutdown_channel_closure.cb = finish_shutdown_channel;
+  chand->finish_shutdown_channel_closure.cb_arg = chand;
+  grpc_iomgr_add_callback(&chand->finish_shutdown_channel_closure);
 }
 
 static void init_call_elem(grpc_call_element *elem,
@@ -621,9 +633,15 @@ static void destroy_channel_elem(grpc_channel_element *elem) {
 }
 
 static const grpc_channel_filter server_surface_filter = {
-    server_start_transport_op, channel_op, sizeof(call_data), init_call_elem,
-    destroy_call_elem, sizeof(channel_data), init_channel_elem,
-    destroy_channel_elem, "server",
+    server_start_transport_op,
+    channel_op,
+    sizeof(call_data),
+    init_call_elem,
+    destroy_call_elem,
+    sizeof(channel_data),
+    init_channel_elem,
+    destroy_channel_elem,
+    "server",
 };
 
 void grpc_server_register_completion_queue(grpc_server *server,
@@ -643,7 +661,9 @@ grpc_server *grpc_server_create_from_filters(grpc_channel_filter **filters,
                                              size_t filter_count,
                                              const grpc_channel_args *args) {
   size_t i;
-  int census_enabled = grpc_channel_args_is_census_enabled(args);
+  /* TODO(census): restore this once we finalize census filter etc.
+     int census_enabled = grpc_channel_args_is_census_enabled(args); */
+  int census_enabled = 0;
 
   grpc_server *server = gpr_malloc(sizeof(grpc_server));
 
@@ -668,9 +688,10 @@ grpc_server *grpc_server_create_from_filters(grpc_channel_filter **filters,
   server->channel_filters =
       gpr_malloc(server->channel_filter_count * sizeof(grpc_channel_filter *));
   server->channel_filters[0] = &server_surface_filter;
+  /* TODO(census): restore this once we rework census filter
   if (census_enabled) {
     server->channel_filters[1] = &grpc_server_census_filter;
-  }
+    } */
   for (i = 0; i < filter_count; i++) {
     server->channel_filters[i + 1 + census_enabled] = filters[i];
   }
@@ -969,9 +990,10 @@ void grpc_server_destroy(grpc_server *server) {
   while ((calld = call_list_remove_head(&server->lists[PENDING_START],
                                         PENDING_START)) != NULL) {
     calld->state = ZOMBIED;
-    grpc_iomgr_add_callback(
-        kill_zombie,
+    grpc_iomgr_closure_init(
+        &calld->kill_zombie_closure, kill_zombie,
         grpc_call_stack_element(grpc_call_get_call_stack(calld->call), 0));
+    grpc_iomgr_add_callback(&calld->kill_zombie_closure);
   }
 
   for (c = server->root_channel_data.next; c != &server->root_channel_data;

src/core/transport/chttp2/gen_hpack_tables.c

@@ -219,10 +219,10 @@ static int state_index(int bitofs, symset syms, int *isnew) {
    emit    - the symbol to emit on this nibble (or -1 if no symbol has been
              found)
    syms    - the set of symbols that could be matched */
-static void build_dec_tbl(int state, int nibble, int nibbits, int bitofs,
+static void build_dec_tbl(int state, int nibble, int nibbits, unsigned bitofs,
                           int emit, symset syms) {
   int i;
-  int bit;
+  unsigned bit;
 
   /* If we have four bits in the nibble we're looking at, then we can fill in
      a slot in the lookup tables. */
@@ -338,7 +338,7 @@ static void generate_base64_inverse_table(void) {
   static const char alphabet[] =
       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
   unsigned char inverse[256];
-  int i;
+  unsigned i;
 
   memset(inverse, 255, sizeof(inverse));
   for (i = 0; i < strlen(alphabet); i++) {

src/cpp/server/thread_pool.cc

@@ -60,7 +60,7 @@ void ThreadPool::ThreadFunc() {
 
 ThreadPool::ThreadPool(int num_threads) : shutdown_(false) {
   for (int i = 0; i < num_threads; i++) {
-    threads_.push_back(grpc::thread(&ThreadPool::ThreadFunc, this));
+    threads_.push_back(new grpc::thread(&ThreadPool::ThreadFunc, this));
   }
 }
 
@@ -71,7 +71,8 @@ ThreadPool::~ThreadPool() {
     cv_.notify_all();
   }
   for (auto t = threads_.begin(); t != threads_.end(); t++) {
-    t->join();
+    (*t)->join();
+    delete *t;
   }
 }
 

src/cpp/server/thread_pool.h

@@ -57,7 +57,7 @@ class ThreadPool GRPC_FINAL : public ThreadPoolInterface {
   grpc::condition_variable cv_;
   bool shutdown_;
   std::queue<std::function<void()>> callbacks_;
-  std::vector<grpc::thread> threads_;
+  std::vector<grpc::thread*> threads_;
 
   void ThreadFunc();
 };

src/csharp/.nuget/packages.config

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="NUnit.Runners" version="2.6.4" />
+</packages>

src/csharp/Grpc.Auth/Grpc.Auth.nuspec

@@ -5,19 +5,19 @@
     <title>gRPC C# Auth</title>
     <summary>Auth library for C# implementation of gRPC - an RPC library and framework</summary>
     <description>Auth library for C# implementation of gRPC - an RPC library and framework. See project site for more info.</description>
-    <version>0.5.0</version>
+    <version>0.5.1</version>
     <authors>Google Inc.</authors>
     <owners>grpc-packages</owners>
     <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
     <projectUrl>https://github.com/grpc/grpc</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <releaseNotes>Release 0.5.0 of gRPC C#</releaseNotes>
+    <releaseNotes>Release 0.5.1 of gRPC C#</releaseNotes>
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2 Auth OAuth2</tags>
 	<dependencies>
 	  <dependency id="BouncyCastle" version="1.7.0" />
 	  <dependency id="Google.Apis.Auth" version="1.9.1" />
-	  <dependency id="Grpc.Core" version="0.5.0" />
+	  <dependency id="Grpc.Core" version="0.5.1" />
     </dependencies>
   </metadata>
   <files>

src/csharp/Grpc.Core/Grpc.Core.nuspec

@@ -5,19 +5,19 @@
     <title>gRPC C# Core</title>
     <summary>Core C# implementation of gRPC - an RPC library and framework</summary>
     <description>Core C# implementation of gRPC - an RPC library and framework. See project site for more info.</description>
-    <version>0.5.0</version>
+    <version>0.5.1</version>
     <authors>Google Inc.</authors>
     <owners>grpc-packages</owners>
     <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
     <projectUrl>https://github.com/grpc/grpc</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <releaseNotes>Release 0.5.0 of gRPC C#</releaseNotes>
+    <releaseNotes>Release 0.5.1 of gRPC C#</releaseNotes>
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2</tags>
 	<dependencies>
 	  <dependency id="Microsoft.Bcl.Immutable" version="1.0.34" />
 	  <dependency id="Ix-Async" version="1.2.3" />
-	  <dependency id="grpc.native.csharp_ext" version="0.9.0.0" />
+	  <dependency id="grpc.native.csharp_ext" version="0.9.1" />
     </dependencies>
   </metadata>
   <files>

src/csharp/Grpc.Tools.nuspec

@@ -5,13 +5,13 @@
     <title>gRPC C# Tools</title>
     <summary>Tools for C# implementation of gRPC - an RPC library and framework</summary>
     <description>Precompiled Windows binaries for generating protocol buffer messages and gRPC client/server code</description>
-    <version>0.5.0</version>
+    <version>0.5.1</version>
     <authors>Google Inc.</authors>
     <owners>grpc-packages</owners>
     <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
     <projectUrl>https://github.com/grpc/grpc</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <releaseNotes>protoc.exe - protocol buffer compiler v3.0.0-alpha-3; grpc_csharp_plugin.exe - gRPC C# protoc plugin version 0.5.0</releaseNotes>
+    <releaseNotes>protoc.exe - protocol buffer compiler v3.0.0-alpha-3; grpc_csharp_plugin.exe - gRPC C# protoc plugin version 0.5.1</releaseNotes>
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2</tags>
   </metadata>

src/csharp/Grpc.nuspec

@@ -5,17 +5,17 @@
     <title>gRPC C#</title>
     <summary>C# implementation of gRPC - an RPC library and framework</summary>
     <description>C# implementation of gRPC - an RPC library and framework. See project site for more info.</description>
-    <version>0.5.0.1</version>
+    <version>0.5.1</version>
     <authors>Google Inc.</authors>
     <owners>grpc-packages</owners>
     <licenseUrl>https://github.com/grpc/grpc/blob/master/LICENSE</licenseUrl>
     <projectUrl>https://github.com/grpc/grpc</projectUrl>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
-    <releaseNotes>Release 0.5.0 of gRPC C#</releaseNotes>
+    <releaseNotes>Release 0.5.1 of gRPC C#</releaseNotes>
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>gRPC RPC Protocol HTTP/2</tags>
     <dependencies>
-      <dependency id="Grpc.Core" version="0.5.0" />
+      <dependency id="Grpc.Core" version="0.5.1" />
     </dependencies>
   </metadata>
   <files/>

src/csharp/Grpc.sln

@@ -1,6 +1,8 @@
 
-Microsoft Visual Studio Solution File, Format Version 11.00
-# Visual Studio 2010
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2013
+VisualStudioVersion = 12.0.31101.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Examples", "Grpc.Examples\Grpc.Examples.csproj", "{7DC1433E-3225-42C7-B7EA-546D56E27A4B}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Core", "Grpc.Core\Grpc.Core.csproj", "{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}"
@@ -21,52 +23,60 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Examples.MathServer",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Grpc.Auth", "Grpc.Auth\Grpc.Auth.csproj", "{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".nuget", ".nuget", "{B5B87121-35FE-49D1-8CB1-8A91AAA398A9}"
+	ProjectSection(SolutionItems) = preProject
+		.nuget\packages.config = .nuget\packages.config
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x86 = Debug|x86
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Debug|x86.Build.0 = Debug|Any CPU
-		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Release|x86.ActiveCfg = Release|Any CPU
-		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Release|x86.Build.0 = Release|Any CPU
-		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Debug|x86.ActiveCfg = Debug|x86
-		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Debug|x86.Build.0 = Debug|x86
-		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Release|x86.ActiveCfg = Release|x86
-		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Release|x86.Build.0 = Release|x86
-		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Debug|x86.ActiveCfg = Debug|x86
-		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Debug|x86.Build.0 = Debug|x86
-		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Release|x86.ActiveCfg = Release|x86
-		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Release|x86.Build.0 = Release|x86
 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Debug|x86.ActiveCfg = Debug|Any CPU
 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Debug|x86.Build.0 = Debug|Any CPU
 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Release|x86.ActiveCfg = Release|Any CPU
 		{7DC1433E-3225-42C7-B7EA-546D56E27A4B}.Release|x86.Build.0 = Release|Any CPU
+		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Debug|x86.Build.0 = Debug|Any CPU
+		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Release|x86.ActiveCfg = Release|Any CPU
+		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Release|x86.Build.0 = Release|Any CPU
 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Debug|x86.ActiveCfg = Debug|Any CPU
 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Debug|x86.Build.0 = Debug|Any CPU
 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Release|x86.ActiveCfg = Release|Any CPU
 		{86EC5CB4-4EA2-40A2-8057-86542A0353BB}.Release|x86.Build.0 = Release|Any CPU
+		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Debug|x86.Build.0 = Debug|Any CPU
+		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Release|x86.ActiveCfg = Release|Any CPU
+		{143B1C29-C442-4BE0-BF3F-A8F92288AC9F}.Release|x86.Build.0 = Release|Any CPU
+		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Debug|x86.ActiveCfg = Debug|x86
+		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Debug|x86.Build.0 = Debug|x86
+		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Release|x86.ActiveCfg = Release|x86
+		{61ECB8EE-0C96-4F8E-B187-8E4D227417C0}.Release|x86.Build.0 = Release|x86
+		{C61154BA-DD4A-4838-8420-0162A28925E0}.Debug|x86.ActiveCfg = Debug|x86
+		{C61154BA-DD4A-4838-8420-0162A28925E0}.Debug|x86.Build.0 = Debug|x86
+		{C61154BA-DD4A-4838-8420-0162A28925E0}.Release|x86.ActiveCfg = Release|x86
+		{C61154BA-DD4A-4838-8420-0162A28925E0}.Release|x86.Build.0 = Release|x86
+		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Debug|x86.ActiveCfg = Debug|x86
+		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Debug|x86.Build.0 = Debug|x86
+		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Release|x86.ActiveCfg = Release|x86
+		{3D166931-BA2D-416E-95A3-D36E8F6E90B9}.Release|x86.Build.0 = Release|x86
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Debug|x86.ActiveCfg = Debug|x86
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Debug|x86.Build.0 = Debug|x86
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Release|x86.ActiveCfg = Release|x86
 		{A654F3B8-E859-4E6A-B30D-227527DBEF0D}.Release|x86.Build.0 = Release|x86
-		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|x86.Build.0 = Debug|Any CPU
-		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|x86.ActiveCfg = Release|Any CPU
-		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|x86.Build.0 = Release|Any CPU
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Debug|x86.ActiveCfg = Debug|x86
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Debug|x86.Build.0 = Debug|x86
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Release|x86.ActiveCfg = Release|x86
 		{BF62FE08-373A-43D6-9D73-41CAA38B7011}.Release|x86.Build.0 = Release|x86
-		{C61154BA-DD4A-4838-8420-0162A28925E0}.Debug|x86.ActiveCfg = Debug|x86
-		{C61154BA-DD4A-4838-8420-0162A28925E0}.Debug|x86.Build.0 = Debug|x86
-		{C61154BA-DD4A-4838-8420-0162A28925E0}.Release|x86.ActiveCfg = Release|x86
-		{C61154BA-DD4A-4838-8420-0162A28925E0}.Release|x86.Build.0 = Release|x86
-		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Debug|x86.Build.0 = Debug|Any CPU
-		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Release|x86.ActiveCfg = Release|Any CPU
-		{CCC4440E-49F7-4790-B0AF-FEABB0837AE7}.Release|x86.Build.0 = Release|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Debug|x86.Build.0 = Debug|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|x86.ActiveCfg = Release|Any CPU
+		{AE21D0EE-9A2C-4C15-AB7F-5224EED5B0EA}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(MonoDevelopProperties) = preSolution
 		StartupItem = Grpc.Examples\Grpc.Examples.csproj

src/csharp/buildall.bat

@@ -1,11 +1,15 @@
 @rem Convenience script to build gRPC C# from command line
 
 setlocal
+
+@rem enter this directory
+cd /d %~dp0
+
 @rem Set VS variables (uses Visual Studio 2013)
 @call "%VS120COMNTOOLS%\..\..\vc\vcvarsall.bat" x86
 
 @rem Build the C# native extension
-msbuild ..\..\vsprojects\grpc.sln /t:grpc_csharp_ext || goto :error
+msbuild ..\..\vsprojects\grpc.sln /t:grpc_csharp_ext /p:PlatformToolset=v120 || goto :error
 
 msbuild Grpc.sln /p:Configuration=Debug || goto :error
 msbuild Grpc.sln /p:Configuration=Release || goto :error

src/objective-c/GRPCClient/private/NSDictionary+GRPC.m

@@ -35,21 +35,90 @@
 
 #include <grpc/support/alloc.h>
 
+#pragma mark Category for binary metadata elements
+
+@interface NSData (GRPCMetadata)
++ (instancetype)grpc_dataFromMetadataValue:(grpc_metadata *)metadata;
+
+// Fill a metadata object with the binary value in this NSData and the given key.
+- (void)grpc_initMetadata:(grpc_metadata *)metadata withKey:(NSString *)key;
+@end
+
+@implementation NSData (GRPCMetadata)
++ (instancetype)grpc_dataFromMetadataValue:(grpc_metadata *)metadata {
+  // TODO(jcanizales): Should we use a non-copy constructor?
+  return [self dataWithBytes:metadata->value length:metadata->value_length];
+}
+
+- (void)grpc_initMetadata:(grpc_metadata *)metadata withKey:(NSString *)key {
+  // TODO(jcanizales): Encode Unicode chars as ASCII.
+  metadata->key = [key stringByAppendingString:@"-bin"].UTF8String;
+  metadata->value = self.bytes;
+  metadata->value_length = self.length;
+}
+@end
+
+#pragma mark Category for textual metadata elements
+
+@interface NSString (GRPCMetadata)
++ (instancetype)grpc_stringFromMetadataValue:(grpc_metadata *)metadata;
+
+// Fill a metadata object with the textual value in this NSString and the given key.
+- (void)grpc_initMetadata:(grpc_metadata *)metadata withKey:(NSString *)key;
+@end
+
+@implementation NSString (GRPCMetadata)
++ (instancetype)grpc_stringFromMetadataValue:(grpc_metadata *)metadata {
+  return [[self alloc] initWithBytes:metadata->value
+                              length:metadata->value_length
+                            encoding:NSASCIIStringEncoding];
+}
+
+- (void)grpc_initMetadata:(grpc_metadata *)metadata withKey:(NSString *)key {
+  if ([key hasSuffix:@"-bin"]) {
+    // Disallow this, as at best it will confuse the server. If the app really needs to send a
+    // textual header with a name ending in "-bin", it can be done by removing the suffix and
+    // encoding the NSString as a NSData object.
+    //
+    // Why raise an exception: In the most common case, the developer knows this won't happen in
+    // their code, so the exception isn't triggered. In the rare cases when the developer can't
+    // tell, it's easy enough to add a sanitizing filter before the header is set. There, the
+    // developer can choose whether to drop such a header, or trim its name. Doing either ourselves,
+    // silently, would be very unintuitive for the user.
+    [NSException raise:NSInvalidArgumentException
+                format:@"Metadata keys ending in '-bin' are reserved for NSData values."];
+  }
+  // TODO(jcanizales): Encode Unicode chars as ASCII.
+  metadata->key = key.UTF8String;
+  metadata->value = self.UTF8String;
+  metadata->value_length = self.length;
+}
+@end
+
+#pragma mark Category for metadata arrays
+
 @implementation NSDictionary (GRPC)
 + (instancetype)grpc_dictionaryFromMetadata:(grpc_metadata *)entries count:(size_t)count {
   NSMutableDictionary *metadata = [NSMutableDictionary dictionaryWithCapacity:count];
   for (grpc_metadata *entry = entries; entry < entries + count; entry++) {
-    // TODO(jcanizales): Verify in a C library test that it's converting header names to lower case automatically.
-    NSString *name = [NSString stringWithUTF8String:entry->key];
+    // TODO(jcanizales): Verify in a C library test that it's converting header names to lower case
+    // automatically.
+    NSString *name = [NSString stringWithCString:entry->key encoding:NSASCIIStringEncoding];
     if (!name) {
+      // log?
       continue;
     }
+    id value;
+    if ([name hasSuffix:@"-bin"]) {
+      name = [name substringToIndex:name.length - 4];
+      value = [NSData grpc_dataFromMetadataValue:entry];
+    } else {
+      value = [NSString grpc_stringFromMetadataValue:entry];
+    }
     if (!metadata[name]) {
       metadata[name] = [NSMutableArray array];
     }
-    // TODO(jcanizales): Should we use a non-copy constructor?
-    [metadata[name] addObject:[NSData dataWithBytes:entry->value
-                                             length:entry->value_length]];
+    [metadata[name] addObject:value];
   }
   return metadata;
 }
@@ -60,11 +129,8 @@
   for (id key in self) {
     id value = self[key];
     grpc_metadata *current = &metadata[i];
-    current->key = [key UTF8String];
-    if ([value isKindOfClass:[NSData class]]) {
-      current->value = [value bytes];
-    } else if ([value isKindOfClass:[NSString class]]) {
-      current->value = [value UTF8String];
+    if ([value respondsToSelector:@selector(grpc_initMetadata:withKey:)]) {
+      [value grpc_initMetadata:current withKey:key];
     } else {
       [NSException raise:NSInvalidArgumentException
                   format:@"Metadata values must be NSString or NSData."];

src/objective-c/examples/Sample/Podfile

@@ -3,13 +3,7 @@ platform :ios, '8.0'
 
 pod 'gRPC', :path => "../../../.."
 pod 'Protobuf', :git => 'https://github.com/google/protobuf.git'
-pod 'Route_guide', :path => "RouteGuideClient"
-pod 'RemoteTest', :path => "RemoteTestClient"
-
-link_with 'Sample', 'SampleTests'
+pod 'RemoteTest', :path => "../../generated_libraries/RemoteTestClient"
 
 target 'Sample' do
 end
-
-target 'SampleTests' do
-end

src/objective-c/examples/Sample/Sample.xcodeproj/project.pbxproj

@@ -7,33 +7,16 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		60BBBBB15823BBF7639D7AA9 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 2DC7B7C4C0410F43B9621631 /* libPods.a */; };
-		6340F0491AE66E3300FB6A3D /* RemoteProtoTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6340F0481AE66E3300FB6A3D /* RemoteProtoTests.m */; };
-		6356D1DE1AC11FE00075FBBC /* RemoteTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6356D1DD1AC11FE00075FBBC /* RemoteTests.m */; };
 		6369A2701A9322E20015FC5C /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A26F1A9322E20015FC5C /* main.m */; };
 		6369A2731A9322E20015FC5C /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2721A9322E20015FC5C /* AppDelegate.m */; };
 		6369A2761A9322E20015FC5C /* ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2751A9322E20015FC5C /* ViewController.m */; };
 		6369A2791A9322E20015FC5C /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 6369A2771A9322E20015FC5C /* Main.storyboard */; };
 		6369A27B1A9322E20015FC5C /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 6369A27A1A9322E20015FC5C /* Images.xcassets */; };
-		6369A27E1A9322E20015FC5C /* LaunchScreen.xib in Resources */ = {isa = PBXBuildFile; fileRef = 6369A27C1A9322E20015FC5C /* LaunchScreen.xib */; };
-		6369A28A1A9322E20015FC5C /* SampleTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6369A2891A9322E20015FC5C /* SampleTests.m */; };
 		FC81FE63CA655031F3524EC0 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 2DC7B7C4C0410F43B9621631 /* libPods.a */; };
 /* End PBXBuildFile section */
 
-/* Begin PBXContainerItemProxy section */
-		6369A2841A9322E20015FC5C /* PBXContainerItemProxy */ = {
-			isa = PBXContainerItemProxy;
-			containerPortal = 6369A2621A9322E20015FC5C /* Project object */;
-			proxyType = 1;
-			remoteGlobalIDString = 6369A2691A9322E20015FC5C;
-			remoteInfo = Sample;
-		};
-/* End PBXContainerItemProxy section */
-
 /* Begin PBXFileReference section */
 		2DC7B7C4C0410F43B9621631 /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
-		6340F0481AE66E3300FB6A3D /* RemoteProtoTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RemoteProtoTests.m; sourceTree = "<group>"; };
-		6356D1DD1AC11FE00075FBBC /* RemoteTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RemoteTests.m; sourceTree = "<group>"; };
 		6369A26A1A9322E20015FC5C /* Sample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Sample.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6369A26E1A9322E20015FC5C /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		6369A26F1A9322E20015FC5C /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
@@ -43,10 +26,6 @@
 		6369A2751A9322E20015FC5C /* ViewController.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ViewController.m; sourceTree = "<group>"; };
 		6369A2781A9322E20015FC5C /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		6369A27A1A9322E20015FC5C /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
-		6369A27D1A9322E20015FC5C /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/LaunchScreen.xib; sourceTree = "<group>"; };
-		6369A2831A9322E20015FC5C /* SampleTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = SampleTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		6369A2881A9322E20015FC5C /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
-		6369A2891A9322E20015FC5C /* SampleTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = SampleTests.m; sourceTree = "<group>"; };
 		AC29DD6FCDF962F519FEBB0D /* Pods.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.debug.xcconfig; path = "Pods/Target Support Files/Pods/Pods.debug.xcconfig"; sourceTree = "<group>"; };
 		C68330F8D451CC6ACEABA09F /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -60,14 +39,6 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		6369A2801A9322E20015FC5C /* Frameworks */ = {
-			isa = PBXFrameworksBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-				60BBBBB15823BBF7639D7AA9 /* libPods.a in Frameworks */,
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
@@ -75,7 +46,6 @@
 			isa = PBXGroup;
 			children = (
 				6369A26C1A9322E20015FC5C /* Sample */,
-				6369A2861A9322E20015FC5C /* SampleTests */,
 				6369A26B1A9322E20015FC5C /* Products */,
 				AB3331C9AE6488E61B2B094E /* Pods */,
 				C4C2C5219053E079C9EFB930 /* Frameworks */,
@@ -86,7 +56,6 @@
 			isa = PBXGroup;
 			children = (
 				6369A26A1A9322E20015FC5C /* Sample.app */,
-				6369A2831A9322E20015FC5C /* SampleTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -100,7 +69,6 @@
 				6369A2751A9322E20015FC5C /* ViewController.m */,
 				6369A2771A9322E20015FC5C /* Main.storyboard */,
 				6369A27A1A9322E20015FC5C /* Images.xcassets */,
-				6369A27C1A9322E20015FC5C /* LaunchScreen.xib */,
 				6369A26D1A9322E20015FC5C /* Supporting Files */,
 			);
 			path = Sample;
@@ -115,25 +83,6 @@
 			name = "Supporting Files";
 			sourceTree = "<group>";
 		};
-		6369A2861A9322E20015FC5C /* SampleTests */ = {
-			isa = PBXGroup;
-			children = (
-				6340F0481AE66E3300FB6A3D /* RemoteProtoTests.m */,
-				6369A2891A9322E20015FC5C /* SampleTests.m */,
-				6369A2871A9322E20015FC5C /* Supporting Files */,
-				6356D1DD1AC11FE00075FBBC /* RemoteTests.m */,
-			);
-			path = SampleTests;
-			sourceTree = "<group>";
-		};
-		6369A2871A9322E20015FC5C /* Supporting Files */ = {
-			isa = PBXGroup;
-			children = (
-				6369A2881A9322E20015FC5C /* Info.plist */,
-			);
-			name = "Supporting Files";
-			sourceTree = "<group>";
-		};
 		AB3331C9AE6488E61B2B094E /* Pods */ = {
 			isa = PBXGroup;
 			children = (
@@ -173,26 +122,6 @@
 			productReference = 6369A26A1A9322E20015FC5C /* Sample.app */;
 			productType = "com.apple.product-type.application";
 		};
-		6369A2821A9322E20015FC5C /* SampleTests */ = {
-			isa = PBXNativeTarget;
-			buildConfigurationList = 6369A2901A9322E20015FC5C /* Build configuration list for PBXNativeTarget "SampleTests" */;
-			buildPhases = (
-				75C393B2FDC60A22B2121058 /* Check Pods Manifest.lock */,
-				6369A27F1A9322E20015FC5C /* Sources */,
-				6369A2801A9322E20015FC5C /* Frameworks */,
-				6369A2811A9322E20015FC5C /* Resources */,
-				7B8CDC152F76D6014A96C798 /* Copy Pods Resources */,
-			);
-			buildRules = (
-			);
-			dependencies = (
-				6369A2851A9322E20015FC5C /* PBXTargetDependency */,
-			);
-			name = SampleTests;
-			productName = SampleTests;
-			productReference = 6369A2831A9322E20015FC5C /* SampleTests.xctest */;
-			productType = "com.apple.product-type.bundle.unit-test";
-		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -205,10 +134,6 @@
 					6369A2691A9322E20015FC5C = {
 						CreatedOnToolsVersion = 6.1.1;
 					};
-					6369A2821A9322E20015FC5C = {
-						CreatedOnToolsVersion = 6.1.1;
-						TestTargetID = 6369A2691A9322E20015FC5C;
-					};
 				};
 			};
 			buildConfigurationList = 6369A2651A9322E20015FC5C /* Build configuration list for PBXProject "Sample" */;
@@ -225,7 +150,6 @@
 			projectRoot = "";
 			targets = (
 				6369A2691A9322E20015FC5C /* Sample */,
-				6369A2821A9322E20015FC5C /* SampleTests */,
 			);
 		};
 /* End PBXProject section */
@@ -236,18 +160,10 @@
 			buildActionMask = 2147483647;
 			files = (
 				6369A2791A9322E20015FC5C /* Main.storyboard in Resources */,
-				6369A27E1A9322E20015FC5C /* LaunchScreen.xib in Resources */,
 				6369A27B1A9322E20015FC5C /* Images.xcassets in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		6369A2811A9322E20015FC5C /* Resources */ = {
-			isa = PBXResourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXShellScriptBuildPhase section */
@@ -281,36 +197,6 @@
 			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
-		75C393B2FDC60A22B2121058 /* Check Pods Manifest.lock */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "Check Pods Manifest.lock";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_ROOT}/../Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [[ $? != 0 ]] ; then\n    cat << EOM\nerror: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\nEOM\n    exit 1\nfi\n";
-			showEnvVarsInLog = 0;
-		};
-		7B8CDC152F76D6014A96C798 /* Copy Pods Resources */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-			);
-			name = "Copy Pods Resources";
-			outputPaths = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods/Pods-resources.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -324,26 +210,8 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		6369A27F1A9322E20015FC5C /* Sources */ = {
-			isa = PBXSourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-				6369A28A1A9322E20015FC5C /* SampleTests.m in Sources */,
-				6340F0491AE66E3300FB6A3D /* RemoteProtoTests.m in Sources */,
-				6356D1DE1AC11FE00075FBBC /* RemoteTests.m in Sources */,
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXSourcesBuildPhase section */
 
-/* Begin PBXTargetDependency section */
-		6369A2851A9322E20015FC5C /* PBXTargetDependency */ = {
-			isa = PBXTargetDependency;
-			target = 6369A2691A9322E20015FC5C /* Sample */;
-			targetProxy = 6369A2841A9322E20015FC5C /* PBXContainerItemProxy */;
-		};
-/* End PBXTargetDependency section */
-
 /* Begin PBXVariantGroup section */
 		6369A2771A9322E20015FC5C /* Main.storyboard */ = {
 			isa = PBXVariantGroup;
@@ -353,14 +221,6 @@
 			name = Main.storyboard;
 			sourceTree = "<group>";
 		};
-		6369A27C1A9322E20015FC5C /* LaunchScreen.xib */ = {
-			isa = PBXVariantGroup;
-			children = (
-				6369A27D1A9322E20015FC5C /* Base */,
-			);
-			name = LaunchScreen.xib;
-			sourceTree = "<group>";
-		};
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
@@ -464,42 +324,6 @@
 			};
 			name = Release;
 		};
-		6369A2911A9322E20015FC5C /* Debug */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = AC29DD6FCDF962F519FEBB0D /* Pods.debug.xcconfig */;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(SDKROOT)/Developer/Library/Frameworks",
-					"$(inherited)",
-				);
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					"DEBUG=1",
-					"$(inherited)",
-				);
-				INFOPLIST_FILE = SampleTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Sample.app/Sample";
-			};
-			name = Debug;
-		};
-		6369A2921A9322E20015FC5C /* Release */ = {
-			isa = XCBuildConfiguration;
-			baseConfigurationReference = C68330F8D451CC6ACEABA09F /* Pods.release.xcconfig */;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(SDKROOT)/Developer/Library/Frameworks",
-					"$(inherited)",
-				);
-				INFOPLIST_FILE = SampleTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/Sample.app/Sample";
-			};
-			name = Release;
-		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
@@ -521,15 +345,6 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		6369A2901A9322E20015FC5C /* Build configuration list for PBXNativeTarget "SampleTests" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				6369A2911A9322E20015FC5C /* Debug */,
-				6369A2921A9322E20015FC5C /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
 /* End XCConfigurationList section */
 	};
 	rootObject = 6369A2621A9322E20015FC5C /* Project object */;

src/objective-c/examples/Sample/Sample/AppDelegate.h

@@ -34,8 +34,5 @@
 #import <UIKit/UIKit.h>
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
-
 @property (strong, nonatomic) UIWindow *window;
-
 @end
-

src/objective-c/examples/Sample/Sample/AppDelegate.m

@@ -33,13 +33,5 @@
 
 #import "AppDelegate.h"
 
-@interface AppDelegate ()
-@end
-
 @implementation AppDelegate
-
-- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-  return YES;
-}
-
 @end

src/objective-c/examples/Sample/Sample/Base.lproj/LaunchScreen.xib

@@ -1,41 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="6214" systemVersion="14A314h" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
-    <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6207"/>
-        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
-    </dependencies>
-    <objects>
-        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
-        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
-        <view contentMode="scaleToFill" id="iN0-l3-epB">
-            <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
-            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-            <subviews>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2015 gRPC. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
-                    <rect key="frame" x="20" y="439" width="441" height="21"/>
-                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
-                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
-                    <nil key="highlightedColor"/>
-                </label>
-                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Sample" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="kId-c2-rCX">
-                    <rect key="frame" x="20" y="140" width="441" height="43"/>
-                    <fontDescription key="fontDescription" type="boldSystem" pointSize="36"/>
-                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
-                    <nil key="highlightedColor"/>
-                </label>
-            </subviews>
-            <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
-            <constraints>
-                <constraint firstItem="kId-c2-rCX" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="bottom" multiplier="1/3" constant="1" id="5cJ-9S-tgC"/>
-                <constraint firstAttribute="centerX" secondItem="kId-c2-rCX" secondAttribute="centerX" id="Koa-jz-hwk"/>
-                <constraint firstAttribute="bottom" secondItem="8ie-xW-0ye" secondAttribute="bottom" constant="20" id="Kzo-t9-V3l"/>
-                <constraint firstItem="8ie-xW-0ye" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="MfP-vx-nX0"/>
-                <constraint firstAttribute="centerX" secondItem="8ie-xW-0ye" secondAttribute="centerX" id="ZEH-qu-HZ9"/>
-                <constraint firstItem="kId-c2-rCX" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="fvb-Df-36g"/>
-            </constraints>
-            <nil key="simulatedStatusBarMetrics"/>
-            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
-            <point key="canvasLocation" x="548" y="455"/>
-        </view>
-    </objects>
-</document>

src/objective-c/examples/Sample/Sample/Base.lproj/Main.storyboard

@@ -1,13 +1,14 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6211" systemVersion="14A298i" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="7702" systemVersion="14D131" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6204"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7701"/>
+        <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
         <scene sceneID="tne-QT-ifu">
             <objects>
-                <viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="" sceneMemberID="viewController">
+                <viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
                     <layoutGuides>
                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
@@ -15,7 +16,38 @@
                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" lineBreakMode="wordWrap" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="BWr-eN-L3y">
+                                <rect key="frame" x="16" y="20" width="568" height="150"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="385" id="exg-IV-Kl0"/>
+                                </constraints>
+                                <string key="text">Sample app launch finished.
+Check ViewController.m for the gRPC calls made, and the logs of this app for their results.
+(You may need to make XCode's Debug Area visible).</string>
+                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                                <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
+                                <nil key="highlightedColor"/>
+                                <variation key="default">
+                                    <mask key="constraints">
+                                        <exclude reference="exg-IV-Kl0"/>
+                                    </mask>
+                                </variation>
+                            </label>
+                        </subviews>
                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <constraints>
+                            <constraint firstItem="wfy-db-euE" firstAttribute="top" secondItem="BWr-eN-L3y" secondAttribute="bottom" constant="430" id="KFC-7p-hRl"/>
+                            <constraint firstAttribute="trailing" secondItem="BWr-eN-L3y" secondAttribute="trailing" constant="16" id="M9C-nN-tFv"/>
+                            <constraint firstItem="BWr-eN-L3y" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leadingMargin" id="SaP-0S-2LK"/>
+                            <constraint firstItem="wfy-db-euE" firstAttribute="top" secondItem="BWr-eN-L3y" secondAttribute="bottom" id="wjC-O4-kJg"/>
+                            <constraint firstItem="BWr-eN-L3y" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" id="ygF-6t-hrg"/>
+                        </constraints>
+                        <variation key="default">
+                            <mask key="constraints">
+                                <exclude reference="KFC-7p-hRl"/>
+                            </mask>
+                        </variation>
                     </view>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>

src/objective-c/examples/Sample/Sample/Info.plist

@@ -23,7 +23,7 @@
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>UILaunchStoryboardName</key>
-	<string>LaunchScreen</string>
+	<string>Main</string>
 	<key>UIMainStoryboardFile</key>
 	<string>Main</string>
 	<key>UIRequiredDeviceCapabilities</key>

src/objective-c/examples/Sample/Sample/ViewController.m

@@ -40,9 +40,6 @@
 #import <RemoteTest/Messages.pbobjc.h>
 #import <RemoteTest/Test.pbrpc.h>
 
-@interface ViewController ()
-@end
-
 @implementation ViewController
 
 - (void)viewDidLoad {

src/objective-c/examples/Sample/SampleTests/Info.plist

@@ -1,24 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>en</string>
-	<key>CFBundleExecutable</key>
-	<string>$(EXECUTABLE_NAME)</string>
-	<key>CFBundleIdentifier</key>
-	<string>org.grpc.$(PRODUCT_NAME:rfc1034identifier)</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>$(PRODUCT_NAME)</string>
-	<key>CFBundlePackageType</key>
-	<string>BNDL</string>
-	<key>CFBundleShortVersionString</key>
-	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>1</string>
-</dict>
-</plist>

src/objective-c/examples/Sample/SampleTests/RemoteTests.m → src/objective-c/tests/GRPCClientTests.m

@@ -40,10 +40,13 @@
 #import <gRPC/GRXWriteable.h>
 #import <RemoteTest/Messages.pbobjc.h>
 
-@interface RemoteTests : XCTestCase
+// These are a few tests similar to InteropTests, but which use the generic gRPC client (GRPCCall)
+// rather than a generated proto library on top of it.
+
+@interface GRPCClientTests : XCTestCase
 @end
 
-@implementation RemoteTests
+@implementation GRPCClientTests
 
 - (void)testConnectionToRemoteServer {
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"Server reachable."];

src/objective-c/examples/Sample/SampleTests/RemoteProtoTests.m → src/objective-c/tests/InteropTests.m

@@ -76,10 +76,10 @@
 }
 @end
 
-@interface RemoteProtoTests : XCTestCase
+@interface InteropTests : XCTestCase
 @end
 
-@implementation RemoteProtoTests {
+@implementation InteropTests {
   RMTTestService *_service;
 }
 
@@ -192,7 +192,7 @@
       [expectation fulfill];
     }
   }];
-  
+
   [self waitForExpectationsWithTimeout:4 handler:nil];
 }
 
@@ -230,7 +230,7 @@
         [requestsBuffer writesFinishedWithError:nil];
       }
     }
-                                       
+
     if (done) {
       XCTAssertEqual(index, 4, @"Received %i responses instead of 4.", index);
       [expectation fulfill];
@@ -283,9 +283,9 @@
   [requestsBuffer writeValue:request];
   
   __block ProtoRPC *call = [_service RPCToFullDuplexCallWithRequestsWriter:requestsBuffer
-                                                           handler:^(BOOL done,
-                                                                     RMTStreamingOutputCallResponse *response,
-                                                                     NSError *error) {
+                                                                   handler:^(BOOL done,
+                                                                             RMTStreamingOutputCallResponse *response,
+                                                                             NSError *error) {
     if (receivedResponse) {
       XCTAssert(done, @"Unexpected extra response %@", response);
       XCTAssertEqual(error.code, GRPC_STATUS_CANCELLED);

src/objective-c/examples/Sample/SampleTests/SampleTests.m → src/objective-c/tests/LocalClearTextTests.m

@@ -41,13 +41,14 @@
 #import <Route_guide/RouteGuide.pbobjc.h>
 #import <Route_guide/RouteGuide.pbrpc.h>
 
-@interface SampleTests : XCTestCase
+// These tests require the gRPC-Java "RouteGuide" sample server to be running locally. To do so,
+// install Gradle by following the instructions here: https://docs.gradle.org/current/userguide/installation.html
+// And use it to run the server by following the instructions here: https://github.com/grpc/grpc-java/tree/master/examples
+
+@interface LocalClearTextTests : XCTestCase
 @end
 
-// These tests require the gRPC-Java "RouteGuide" sample server to be running locally. Install the
-// gRPC-Java library following the instructions here: https://github.com/grpc/grpc-java And run the
-// server by following the instructions here: https://github.com/grpc/grpc-java/tree/master/examples
-@implementation SampleTests
+@implementation LocalClearTextTests
 
 - (void)testConnectionToLocalServer {
   __weak XCTestExpectation *expectation = [self expectationWithDescription:@"Server reachable."];

src/objective-c/tests/Podfile

@@ -1,7 +1,10 @@
 source 'https://github.com/CocoaPods/Specs.git'
 platform :ios, '8.0'
 
-pod 'gRPC/RxLibrary', :path => "../../.."
+pod 'gRPC', :path => "../../.."
+pod 'Protobuf', :git => 'https://github.com/google/protobuf.git'
+pod 'RemoteTest', :path => "../generated_libraries/RemoteTestClient"
+pod 'Route_guide', :path => "../generated_libraries/RouteGuideClient"
 
 link_with 'AllTests'
 

src/objective-c/tests/Tests.xcodeproj/project.pbxproj

@@ -7,9 +7,12 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		6312AE4E1B1BF49B00341DEE /* GRPCClientTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6312AE4D1B1BF49B00341DEE /* GRPCClientTests.m */; };
+		63175DFF1B1B9FAF00027841 /* LocalClearTextTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 63175DFE1B1B9FAF00027841 /* LocalClearTextTests.m */; };
 		63423F4A1B150A5F006CF63C /* libTests.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 635697C71B14FC11007A7283 /* libTests.a */; };
 		63423F511B151B77006CF63C /* RxLibraryUnitTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 63423F501B151B77006CF63C /* RxLibraryUnitTests.m */; };
 		635697CD1B14FC11007A7283 /* Tests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635697CC1B14FC11007A7283 /* Tests.m */; };
+		635ED2EC1B1A3BC400FDE5C3 /* InteropTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */; };
 		7D8A186224D39101F90230F6 /* libPods.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */; };
 /* End PBXBuildFile section */
 
@@ -38,11 +41,14 @@
 /* Begin PBXFileReference section */
 		0A4F89D9C90E9C30990218F0 /* Pods.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.release.xcconfig; path = "Pods/Target Support Files/Pods/Pods.release.xcconfig"; sourceTree = "<group>"; };
 		35F2B6BF3BAE8F0DC4AFD76E /* libPods.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libPods.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		6312AE4D1B1BF49B00341DEE /* GRPCClientTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GRPCClientTests.m; sourceTree = "<group>"; };
+		63175DFE1B1B9FAF00027841 /* LocalClearTextTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = LocalClearTextTests.m; sourceTree = "<group>"; };
 		63423F441B150A5F006CF63C /* AllTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = AllTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		63423F501B151B77006CF63C /* RxLibraryUnitTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RxLibraryUnitTests.m; sourceTree = "<group>"; };
 		635697C71B14FC11007A7283 /* libTests.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libTests.a; sourceTree = BUILT_PRODUCTS_DIR; };
 		635697CC1B14FC11007A7283 /* Tests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = Tests.m; sourceTree = "<group>"; };
 		635697D81B14FC11007A7283 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = InteropTests.m; sourceTree = "<group>"; };
 		FF7B5489BCFE40111D768DD0 /* Pods.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = Pods.debug.xcconfig; path = "Pods/Target Support Files/Pods/Pods.debug.xcconfig"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -105,6 +111,9 @@
 		635697C91B14FC11007A7283 /* Tests */ = {
 			isa = PBXGroup;
 			children = (
+				6312AE4D1B1BF49B00341DEE /* GRPCClientTests.m */,
+				63175DFE1B1B9FAF00027841 /* LocalClearTextTests.m */,
+				635ED2EB1B1A3BC400FDE5C3 /* InteropTests.m */,
 				63423F501B151B77006CF63C /* RxLibraryUnitTests.m */,
 				635697CC1B14FC11007A7283 /* Tests.m */,
 				635697D71B14FC11007A7283 /* Supporting Files */,
@@ -243,7 +252,10 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				63175DFF1B1B9FAF00027841 /* LocalClearTextTests.m in Sources */,
 				63423F511B151B77006CF63C /* RxLibraryUnitTests.m in Sources */,
+				6312AE4E1B1BF49B00341DEE /* GRPCClientTests.m in Sources */,
+				635ED2EC1B1A3BC400FDE5C3 /* InteropTests.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

src/python/src/grpc/_adapter/_c.c

@@ -1,86 +0,0 @@
-/*
- *
- * Copyright 2015, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
-
-#include <Python.h>
-#include <grpc/grpc.h>
-
-#include "grpc/_adapter/_completion_queue.h"
-#include "grpc/_adapter/_channel.h"
-#include "grpc/_adapter/_call.h"
-#include "grpc/_adapter/_server.h"
-#include "grpc/_adapter/_client_credentials.h"
-#include "grpc/_adapter/_server_credentials.h"
-
-static PyObject *init(PyObject *self) {
-  grpc_init();
-  Py_RETURN_NONE;
-}
-
-static PyObject *shutdown(PyObject *self) {
-  grpc_shutdown();
-  Py_RETURN_NONE;
-}
-
-static PyMethodDef _c_methods[] = {
-    {"init", (PyCFunction)init, METH_NOARGS,
-     "Initialize the module's static state."},
-    {"shut_down", (PyCFunction)shutdown, METH_NOARGS,
-     "Shut down the module's static state."},
-    {NULL},
-};
-
-PyMODINIT_FUNC init_c(void) {
-  PyObject *module;
-
-  module = Py_InitModule3("_c", _c_methods,
-                          "Wrappings of C structures and functions.");
-
-  if (pygrpc_add_completion_queue(module) == -1) {
-    return;
-  }
-  if (pygrpc_add_channel(module) == -1) {
-    return;
-  }
-  if (pygrpc_add_call(module) == -1) {
-    return;
-  }
-  if (pygrpc_add_server(module) == -1) {
-    return;
-  }
-  if (pygrpc_add_client_credentials(module) == -1) {
-    return;
-  }
-  if (pygrpc_add_server_credentials(module) == -1) {
-    return;
-  }
-}

src/python/src/grpc/_adapter/_c/module.c

@@ -0,0 +1,61 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdlib.h>
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+
+#include "grpc/_adapter/_c/types.h"
+
+static PyMethodDef c_methods[] = {
+    {NULL}
+};
+
+PyMODINIT_FUNC init_c(void) {
+  PyObject *module;
+
+  module = Py_InitModule3("_c", c_methods,
+                          "Wrappings of C structures and functions.");
+
+  if (pygrpc_module_add_types(module) < 0) {
+    return;
+  }
+
+  /* GRPC maintains an internal counter of how many times it has been
+     initialized and handles multiple pairs of grpc_init()/grpc_shutdown()
+     invocations accordingly. */
+  grpc_init();
+  atexit(&grpc_shutdown);
+}

src/python/src/grpc/_adapter/_c/types.c

@@ -0,0 +1,60 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+
+int pygrpc_module_add_types(PyObject *module) {
+  int i;
+  PyTypeObject *types[] = {
+      &pygrpc_ClientCredentials_type,
+      &pygrpc_ServerCredentials_type,
+      &pygrpc_CompletionQueue_type,
+      &pygrpc_Call_type,
+      &pygrpc_Channel_type,
+      &pygrpc_Server_type
+  };
+  for (i = 0; i < sizeof(types)/sizeof(PyTypeObject *); ++i) {
+    if (PyType_Ready(types[i]) < 0) {
+      return -1;
+    }
+  }
+  for (i = 0; i < sizeof(types)/sizeof(PyTypeObject *); ++i) {
+    Py_INCREF(types[i]);
+    PyModule_AddObject(module, types[i]->tp_name, (PyObject *)types[i]);
+  }
+  return 0;
+}

src/python/src/grpc/_adapter/_c/types.h

@@ -0,0 +1,271 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC__ADAPTER__C_TYPES_H_
+#define GRPC__ADAPTER__C_TYPES_H_
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+
+
+/*=========================*/
+/* Client-side credentials */
+/*=========================*/
+
+typedef struct ClientCredentials {
+  PyObject_HEAD
+  grpc_credentials *c_creds;
+} ClientCredentials;
+void pygrpc_ClientCredentials_dealloc(ClientCredentials *self);
+ClientCredentials *pygrpc_ClientCredentials_google_default(
+    PyTypeObject *type, PyObject *ignored);
+ClientCredentials *pygrpc_ClientCredentials_ssl(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+ClientCredentials *pygrpc_ClientCredentials_composite(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+ClientCredentials *pygrpc_ClientCredentials_compute_engine(
+    PyTypeObject *type, PyObject *ignored);
+ClientCredentials *pygrpc_ClientCredentials_service_account(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+ClientCredentials *pygrpc_ClientCredentials_jwt(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+ClientCredentials *pygrpc_ClientCredentials_refresh_token(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+ClientCredentials *pygrpc_ClientCredentials_fake_transport_security(
+    PyTypeObject *type, PyObject *ignored);
+ClientCredentials *pygrpc_ClientCredentials_iam(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+extern PyTypeObject pygrpc_ClientCredentials_type;
+
+
+/*=========================*/
+/* Server-side credentials */
+/*=========================*/
+
+typedef struct ServerCredentials {
+  PyObject_HEAD
+  grpc_server_credentials *c_creds;
+} ServerCredentials;
+void pygrpc_ServerCredentials_dealloc(ServerCredentials *self);
+ServerCredentials *pygrpc_ServerCredentials_ssl(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+ServerCredentials *pygrpc_ServerCredentials_fake_transport_security(
+    PyTypeObject *type, PyObject *ignored);
+extern PyTypeObject pygrpc_ServerCredentials_type;
+
+
+/*==================*/
+/* Completion queue */
+/*==================*/
+
+typedef struct CompletionQueue {
+  PyObject_HEAD
+  grpc_completion_queue *c_cq;
+} CompletionQueue;
+CompletionQueue *pygrpc_CompletionQueue_new(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+void pygrpc_CompletionQueue_dealloc(CompletionQueue *self);
+PyObject *pygrpc_CompletionQueue_next(
+    CompletionQueue *self, PyObject *args, PyObject *kwargs);
+PyObject *pygrpc_CompletionQueue_shutdown(
+    CompletionQueue *self, PyObject *ignored);
+extern PyTypeObject pygrpc_CompletionQueue_type;
+
+
+/*======*/
+/* Call */
+/*======*/
+
+typedef struct Call {
+  PyObject_HEAD
+  grpc_call *c_call;
+  CompletionQueue *cq;
+} Call;
+Call *pygrpc_Call_new_empty(CompletionQueue *cq);
+void pygrpc_Call_dealloc(Call *self);
+PyObject *pygrpc_Call_start_batch(Call *self, PyObject *args, PyObject *kwargs);
+PyObject *pygrpc_Call_cancel(Call *self, PyObject *args, PyObject *kwargs);
+extern PyTypeObject pygrpc_Call_type;
+
+
+/*=========*/
+/* Channel */
+/*=========*/
+
+typedef struct Channel {
+  PyObject_HEAD
+  grpc_channel *c_chan;
+} Channel;
+Channel *pygrpc_Channel_new(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs);
+void pygrpc_Channel_dealloc(Channel *self);
+Call *pygrpc_Channel_create_call(
+    Channel *self, PyObject *args, PyObject *kwargs);
+extern PyTypeObject pygrpc_Channel_type;
+
+
+/*========*/
+/* Server */
+/*========*/
+
+typedef struct Server {
+  PyObject_HEAD
+  grpc_server *c_serv;
+  CompletionQueue *cq;
+} Server;
+Server *pygrpc_Server_new(PyTypeObject *type, PyObject *args, PyObject *kwargs);
+void pygrpc_Server_dealloc(Server *self);
+PyObject *pygrpc_Server_request_call(
+    Server *self, PyObject *args, PyObject *kwargs);
+PyObject *pygrpc_Server_add_http2_port(
+    Server *self, PyObject *args, PyObject *kwargs);
+PyObject *pygrpc_Server_start(Server *self, PyObject *ignored);
+PyObject *pygrpc_Server_shutdown(
+    Server *self, PyObject *args, PyObject *kwargs);
+extern PyTypeObject pygrpc_Server_type;
+
+/*=========*/
+/* Utility */
+/*=========*/
+
+/* Every tag that passes from Python GRPC to GRPC core is of this type. */
+typedef struct pygrpc_tag {
+  PyObject *user_tag;
+  Call *call;
+  grpc_call_details request_call_details;
+  grpc_metadata_array request_metadata;
+  grpc_op *ops;
+  size_t nops;
+  int is_new_call;
+} pygrpc_tag;
+
+/* Construct a tag associated with a batch call. Does not take ownership of the
+   resources in the elements of ops. */
+pygrpc_tag *pygrpc_produce_batch_tag(PyObject *user_tag, Call *call,
+                                     grpc_op *ops, size_t nops);
+
+
+/* Construct a tag associated with a server request. The calling code should
+   use the appropriate fields of the produced tag in the invocation of
+   grpc_server_request_call. */
+pygrpc_tag *pygrpc_produce_request_tag(PyObject *user_tag, Call *empty_call);
+
+/* Construct a tag associated with a server shutdown. */
+pygrpc_tag *pygrpc_produce_server_shutdown_tag(PyObject *user_tag);
+
+/* Frees all resources owned by the tag and the tag itself. */
+void pygrpc_discard_tag(pygrpc_tag *tag);
+
+/* Consumes an event and its associated tag, providing a Python tuple of the
+   form `(type, tag, call, call_details, results)` (where type is an integer
+   corresponding to a grpc_completion_type, tag is an arbitrary PyObject, call
+   is the call object associated with the event [if any], call_details is a
+   tuple of form `(method, host, deadline)` [if such details are available],
+   and resultd is a list of tuples of form `(type, metadata, message, status,
+   cancelled)` [where type corresponds to a grpc_op_type, metadata is a
+   sequence of 2-sequences of strings, message is a byte string, and status is
+   a 2-tuple of an integer corresponding to grpc_status_code and a string of
+   status details]).
+
+   Frees all resources associated with the event tag. */
+PyObject *pygrpc_consume_event(grpc_event event);
+
+/* Transliterate the Python tuple of form `(type, metadata, message,
+   status)` (where type is an integer corresponding to a grpc_op_type, metadata
+   is a sequence of 2-sequences of strings, message is a byte string, and
+   status is 2-tuple of an integer corresponding to grpc_status_code and a
+   string of status details) to a grpc_op suitable for use in a
+   grpc_call_start_batch invocation. The grpc_op is a 'directory' of resources
+   that must be freed after GRPC core is done with them.
+
+   Calls gpr_malloc (or the appropriate type-specific grpc_*_create function)
+   to populate the appropriate union-discriminated members of the op.
+
+   Returns true on success, false on failure. */
+int pygrpc_produce_op(PyObject *op, grpc_op *result);
+
+/* Discards all resources associated with the passed in op that was produced by
+   pygrpc_produce_op. */
+void pygrpc_discard_op(grpc_op op);
+
+/* Transliterate the grpc_ops (which have been sent through a
+   grpc_call_start_batch invocation and whose corresponding event has appeared
+   on a completion queue) to a Python tuple of form `(type, metadata, message,
+   status, cancelled)` (where type is an integer corresponding to a
+   grpc_op_type, metadata is a sequence of 2-sequences of strings, message is a
+   byte string, and status is 2-tuple of an integer corresponding to
+   grpc_status_code and a string of status details).
+
+   Calls gpr_free (or the appropriate type-specific grpc_*_destroy function) on
+   the appropriate union-discriminated populated members of the ops. */
+PyObject *pygrpc_consume_ops(grpc_op *op, size_t nops);
+
+/* Transliterate from a gpr_timespec to a double (in units of seconds, either
+   from the epoch if interpreted absolutely or as a delta otherwise). */
+double pygrpc_cast_gpr_timespec_to_double(gpr_timespec timespec);
+
+/* Transliterate from a double (in units of seconds from the epoch if
+   interpreted absolutely or as a delta otherwise) to a gpr_timespec. */
+gpr_timespec pygrpc_cast_double_to_gpr_timespec(double seconds);
+
+/* Returns true on success, false on failure. */
+int pygrpc_cast_pylist_to_send_metadata(
+    PyObject *pylist, grpc_metadata **metadata, size_t *count);
+/* Returns a metadata array as a Python object on success, else NULL. */
+PyObject *pygrpc_cast_metadata_array_to_pylist(grpc_metadata_array metadata);
+
+/* Transliterate from a list of python channel arguments (2-tuples of string
+   and string|integer|None) to a grpc_channel_args object. The strings placed
+   in the grpc_channel_args object's grpc_arg elements are views of the Python
+   object. The Python object must live long enough for the grpc_channel_args
+   to be used. Arguments set to None are silently ignored. Returns true on
+   success, false on failure. */
+int pygrpc_produce_channel_args(PyObject *py_args, grpc_channel_args *c_args);
+void pygrpc_discard_channel_args(grpc_channel_args args);
+
+/* Read the bytes from grpc_byte_buffer to a gpr_malloc'd array of bytes;
+   output to result and result_size. */
+void pygrpc_byte_buffer_to_bytes(
+    grpc_byte_buffer *buffer, char **result, size_t *result_size);
+
+
+/*========*/
+/* Module */
+/*========*/
+
+/* Returns 0 on success, -1 on failure. */
+int pygrpc_module_add_types(PyObject *module);
+
+#endif  /* GRPC__ADAPTER__C_TYPES_H_ */

src/python/src/grpc/_adapter/_c/types/call.c

@@ -0,0 +1,163 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+
+
+PyMethodDef pygrpc_Call_methods[] = {
+    {"start_batch", (PyCFunction)pygrpc_Call_start_batch, METH_KEYWORDS, ""},
+    {"cancel", (PyCFunction)pygrpc_Call_cancel, METH_KEYWORDS, ""},
+    {NULL}
+};
+const char pygrpc_Call_doc[] = "See grpc._adapter._types.Call.";
+PyTypeObject pygrpc_Call_type = {
+    PyObject_HEAD_INIT(NULL)
+    0,                                        /* ob_size */
+    "Call",                                   /* tp_name */
+    sizeof(Call),                             /* tp_basicsize */
+    0,                                        /* tp_itemsize */
+    (destructor)pygrpc_Call_dealloc,          /* tp_dealloc */
+    0,                                        /* tp_print */
+    0,                                        /* tp_getattr */
+    0,                                        /* tp_setattr */
+    0,                                        /* tp_compare */
+    0,                                        /* tp_repr */
+    0,                                        /* tp_as_number */
+    0,                                        /* tp_as_sequence */
+    0,                                        /* tp_as_mapping */
+    0,                                        /* tp_hash */
+    0,                                        /* tp_call */
+    0,                                        /* tp_str */
+    0,                                        /* tp_getattro */
+    0,                                        /* tp_setattro */
+    0,                                        /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+    pygrpc_Call_doc,                          /* tp_doc */
+    0,                                        /* tp_traverse */
+    0,                                        /* tp_clear */
+    0,                                        /* tp_richcompare */
+    0,                                        /* tp_weaklistoffset */
+    0,                                        /* tp_iter */
+    0,                                        /* tp_iternext */
+    pygrpc_Call_methods,                      /* tp_methods */
+    0,                                        /* tp_members */
+    0,                                        /* tp_getset */
+    0,                                        /* tp_base */
+    0,                                        /* tp_dict */
+    0,                                        /* tp_descr_get */
+    0,                                        /* tp_descr_set */
+    0,                                        /* tp_dictoffset */
+    0,                                        /* tp_init */
+    0,                                        /* tp_alloc */
+    0                                         /* tp_new */
+};
+
+Call *pygrpc_Call_new_empty(CompletionQueue *cq) {
+  Call *call = (Call *)pygrpc_Call_type.tp_alloc(&pygrpc_Call_type, 0);
+  call->c_call = NULL;
+  call->cq = cq;
+  Py_XINCREF(call->cq);
+  return call;
+}
+void pygrpc_Call_dealloc(Call *self) {
+  if (self->c_call) {
+    grpc_call_destroy(self->c_call);
+  }
+  Py_XDECREF(self->cq);
+  self->ob_type->tp_free((PyObject *)self);
+}
+PyObject *pygrpc_Call_start_batch(Call *self, PyObject *args, PyObject *kwargs) {
+  PyObject *op_list;
+  PyObject *user_tag;
+  grpc_op *ops;
+  size_t nops;
+  size_t i;
+  size_t j;
+  pygrpc_tag *tag;
+  grpc_call_error errcode;
+  static char *keywords[] = {"ops", "tag", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO:start_batch", keywords,
+                                   &op_list, &user_tag)) {
+    return NULL;
+  }
+  if (!PyList_Check(op_list)) {
+    PyErr_SetString(PyExc_TypeError, "expected a list of OpArgs");
+    return NULL;
+  }
+  nops = PyList_Size(op_list);
+  ops = gpr_malloc(sizeof(grpc_op) * nops);
+  for (i = 0; i < nops; ++i) {
+    PyObject *item = PyList_GET_ITEM(op_list, i);
+    if (!pygrpc_produce_op(item, &ops[i])) {
+      for (j = 0; j < i; ++j) {
+        pygrpc_discard_op(ops[j]);
+      }
+      return NULL;
+    }
+  }
+  tag = pygrpc_produce_batch_tag(user_tag, self, ops, nops);
+  errcode = grpc_call_start_batch(self->c_call, tag->ops, tag->nops, tag);
+  gpr_free(ops);
+  return PyInt_FromLong(errcode);
+}
+PyObject *pygrpc_Call_cancel(Call *self, PyObject *args, PyObject *kwargs) {
+  PyObject *py_code = NULL;
+  grpc_call_error errcode;
+  int code;
+  char *details = NULL;
+  static char *keywords[] = {"code", "details", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|Os:start_batch", keywords,
+                                   &py_code, &details)) {
+    return NULL;
+  }
+  if (py_code != NULL && details != NULL) {
+    if (!PyInt_Check(py_code)) {
+      PyErr_SetString(PyExc_TypeError, "expected integer code");
+      return NULL;
+    }
+    code = PyInt_AsLong(py_code);
+    errcode = grpc_call_cancel_with_status(self->c_call, code, details);
+  } else if (py_code != NULL || details != NULL) {
+    PyErr_SetString(PyExc_ValueError,
+                    "if `code` is specified, so must `details`");
+    return NULL;
+  } else {
+    errcode = grpc_call_cancel(self->c_call);
+  }
+  return PyInt_FromLong(errcode);
+}

src/python/src/grpc/_adapter/_c/types/channel.c

@@ -0,0 +1,134 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+
+
+PyMethodDef pygrpc_Channel_methods[] = {
+    {"create_call", (PyCFunction)pygrpc_Channel_create_call, METH_KEYWORDS, ""},
+    {NULL}
+};
+const char pygrpc_Channel_doc[] = "See grpc._adapter._types.Channel.";
+PyTypeObject pygrpc_Channel_type = {
+    PyObject_HEAD_INIT(NULL)
+    0,                                        /* ob_size */
+    "Channel",                                /* tp_name */
+    sizeof(Channel),                          /* tp_basicsize */
+    0,                                        /* tp_itemsize */
+    (destructor)pygrpc_Channel_dealloc,       /* tp_dealloc */
+    0,                                        /* tp_print */
+    0,                                        /* tp_getattr */
+    0,                                        /* tp_setattr */
+    0,                                        /* tp_compare */
+    0,                                        /* tp_repr */
+    0,                                        /* tp_as_number */
+    0,                                        /* tp_as_sequence */
+    0,                                        /* tp_as_mapping */
+    0,                                        /* tp_hash */
+    0,                                        /* tp_call */
+    0,                                        /* tp_str */
+    0,                                        /* tp_getattro */
+    0,                                        /* tp_setattro */
+    0,                                        /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+    pygrpc_Channel_doc,                       /* tp_doc */
+    0,                                        /* tp_traverse */
+    0,                                        /* tp_clear */
+    0,                                        /* tp_richcompare */
+    0,                                        /* tp_weaklistoffset */
+    0,                                        /* tp_iter */
+    0,                                        /* tp_iternext */
+    pygrpc_Channel_methods,                   /* tp_methods */
+    0,                                        /* tp_members */
+    0,                                        /* tp_getset */
+    0,                                        /* tp_base */
+    0,                                        /* tp_dict */
+    0,                                        /* tp_descr_get */
+    0,                                        /* tp_descr_set */
+    0,                                        /* tp_dictoffset */
+    0,                                        /* tp_init */
+    0,                                        /* tp_alloc */
+    (newfunc)pygrpc_Channel_new               /* tp_new */
+};
+
+Channel *pygrpc_Channel_new(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  Channel *self;
+  const char *target;
+  PyObject *py_args;
+  ClientCredentials *creds = NULL;
+  grpc_channel_args c_args;
+  char *keywords[] = {"target", "args", "creds", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|O!:Channel", keywords,
+        &target, &py_args, &pygrpc_ClientCredentials_type, &creds)) {
+    return NULL;
+  }
+  if (!pygrpc_produce_channel_args(py_args, &c_args)) {
+    return NULL;
+  }
+  self = (Channel *)type->tp_alloc(type, 0);
+  if (creds) {
+    self->c_chan = grpc_secure_channel_create(creds->c_creds, target, &c_args);
+  } else {
+    self->c_chan = grpc_channel_create(target, &c_args);
+  }
+  pygrpc_discard_channel_args(c_args);
+  return self;
+}
+void pygrpc_Channel_dealloc(Channel *self) {
+  grpc_channel_destroy(self->c_chan);
+  self->ob_type->tp_free((PyObject *)self);
+}
+
+Call *pygrpc_Channel_create_call(
+    Channel *self, PyObject *args, PyObject *kwargs) {
+  Call *call;
+  CompletionQueue *cq;
+  const char *method;
+  const char *host;
+  double deadline;
+  char *keywords[] = {"cq", "method", "host", "deadline", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!ssd:create_call", keywords,
+        &pygrpc_CompletionQueue_type, &cq, &method, &host, &deadline)) {
+    return NULL;
+  }
+  call = pygrpc_Call_new_empty(cq);
+  call->c_call = grpc_channel_create_call(
+      self->c_chan, cq->c_cq, method, host,
+      pygrpc_cast_double_to_gpr_timespec(deadline));
+  return call;
+}

src/python/src/grpc/_adapter/_c/types/client_credentials.c

@@ -0,0 +1,286 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+
+
+PyMethodDef pygrpc_ClientCredentials_methods[] = {
+    {"google_default", (PyCFunction)pygrpc_ClientCredentials_google_default,
+     METH_CLASS|METH_NOARGS, ""},
+    {"ssl", (PyCFunction)pygrpc_ClientCredentials_ssl,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {"composite", (PyCFunction)pygrpc_ClientCredentials_composite,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {"compute_engine", (PyCFunction)pygrpc_ClientCredentials_compute_engine,
+     METH_CLASS|METH_NOARGS, ""},
+    {"service_account", (PyCFunction)pygrpc_ClientCredentials_service_account,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {"jwt", (PyCFunction)pygrpc_ClientCredentials_jwt,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {"refresh_token", (PyCFunction)pygrpc_ClientCredentials_refresh_token,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {"fake_transport_security",
+     (PyCFunction)pygrpc_ClientCredentials_fake_transport_security,
+     METH_CLASS|METH_NOARGS, ""},
+    {"iam", (PyCFunction)pygrpc_ClientCredentials_iam,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {NULL}
+};
+const char pygrpc_ClientCredentials_doc[] = "";
+PyTypeObject pygrpc_ClientCredentials_type = {
+    PyObject_HEAD_INIT(NULL)
+    0,                                        /* ob_size */
+    "ClientCredentials",                      /* tp_name */
+    sizeof(ClientCredentials),                /* tp_basicsize */
+    0,                                        /* tp_itemsize */
+    (destructor)pygrpc_ClientCredentials_dealloc, /* tp_dealloc */
+    0,                                        /* tp_print */
+    0,                                        /* tp_getattr */
+    0,                                        /* tp_setattr */
+    0,                                        /* tp_compare */
+    0,                                        /* tp_repr */
+    0,                                        /* tp_as_number */
+    0,                                        /* tp_as_sequence */
+    0,                                        /* tp_as_mapping */
+    0,                                        /* tp_hash */
+    0,                                        /* tp_call */
+    0,                                        /* tp_str */
+    0,                                        /* tp_getattro */
+    0,                                        /* tp_setattro */
+    0,                                        /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+    pygrpc_ClientCredentials_doc,             /* tp_doc */
+    0,                                        /* tp_traverse */
+    0,                                        /* tp_clear */
+    0,                                        /* tp_richcompare */
+    0,                                        /* tp_weaklistoffset */
+    0,                                        /* tp_iter */
+    0,                                        /* tp_iternext */
+    pygrpc_ClientCredentials_methods,         /* tp_methods */
+    0,                                        /* tp_members */
+    0,                                        /* tp_getset */
+    0,                                        /* tp_base */
+    0,                                        /* tp_dict */
+    0,                                        /* tp_descr_get */
+    0,                                        /* tp_descr_set */
+    0,                                        /* tp_dictoffset */
+    0,                                        /* tp_init */
+    0,                                        /* tp_alloc */
+    0                                         /* tp_new */
+};
+
+void pygrpc_ClientCredentials_dealloc(ClientCredentials *self) {
+  grpc_credentials_release(self->c_creds);
+  self->ob_type->tp_free((PyObject *)self);
+}
+
+ClientCredentials *pygrpc_ClientCredentials_google_default(
+    PyTypeObject *type, PyObject *ignored) {
+  ClientCredentials *self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_google_default_credentials_create();
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError,
+                    "couldn't create Google default credentials");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_ssl(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ClientCredentials *self;
+  const char *root_certs;
+  const char *private_key = NULL;
+  const char *cert_chain = NULL;
+  grpc_ssl_pem_key_cert_pair key_cert_pair;
+  static char *keywords[] = {"root_certs", "private_key", "cert_chain", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "z|zz:ssl", keywords,
+        &root_certs, &private_key, &cert_chain)) {
+    return NULL;
+  }
+  self = (ClientCredentials *)type->tp_alloc(type, 0);
+  if (private_key && cert_chain) {
+    key_cert_pair.private_key = private_key;
+    key_cert_pair.cert_chain = cert_chain;
+    self->c_creds = grpc_ssl_credentials_create(root_certs, &key_cert_pair);
+  } else {
+    self->c_creds = grpc_ssl_credentials_create(root_certs, NULL);
+  }
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError, "couldn't create ssl credentials");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_composite(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ClientCredentials *self;
+  ClientCredentials *creds1;
+  ClientCredentials *creds2;
+  static char *keywords[] = {"creds1", "creds2", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!O!:composite", keywords,
+        &pygrpc_ClientCredentials_type, &creds1,
+        &pygrpc_ClientCredentials_type, &creds2)) {
+    return NULL;
+  }
+  self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_composite_credentials_create(
+      creds1->c_creds, creds2->c_creds);
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError, "couldn't create composite credentials");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_compute_engine(
+    PyTypeObject *type, PyObject *ignored) {
+  ClientCredentials *self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_compute_engine_credentials_create();
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError,
+                    "couldn't create compute engine credentials");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_service_account(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ClientCredentials *self;
+  const char *json_key;
+  const char *scope;
+  double lifetime;
+  static char *keywords[] = {"json_key", "scope", "token_lifetime", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssd:service_account", keywords,
+        &json_key, &scope, &lifetime)) {
+    return NULL;
+  }
+  self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_service_account_credentials_create(
+      json_key, scope, pygrpc_cast_double_to_gpr_timespec(lifetime));
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError,
+                    "couldn't create service account credentials");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_jwt(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ClientCredentials *self;
+  const char *json_key;
+  double lifetime;
+  static char *keywords[] = {"json_key", "token_lifetime", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sd:jwt", keywords,
+        &json_key, &lifetime)) {
+    return NULL;
+  }
+  self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_jwt_credentials_create(
+      json_key, pygrpc_cast_double_to_gpr_timespec(lifetime));
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError, "couldn't create JWT credentials");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_refresh_token(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ClientCredentials *self;
+  const char *json_refresh_token;
+  static char *keywords[] = {"json_refresh_token", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:refresh_token", keywords,
+        &json_refresh_token)) {
+    return NULL;
+  }
+  self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_refresh_token_credentials_create(json_refresh_token);
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError,
+                    "couldn't create credentials from refresh token");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_fake_transport_security(
+    PyTypeObject *type, PyObject *ignored) {
+  ClientCredentials *self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_fake_transport_security_credentials_create();
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError,
+                    "couldn't create fake credentials; "
+                    "something is horribly wrong with the universe");
+    return NULL;
+  }
+  return self;
+}
+
+ClientCredentials *pygrpc_ClientCredentials_iam(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ClientCredentials *self;
+  const char *authorization_token;
+  const char *authority_selector;
+  static char *keywords[] = {"authorization_token", "authority_selector", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ss:iam", keywords,
+        &authorization_token, &authority_selector)) {
+    return NULL;
+  }
+  self = (ClientCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_iam_credentials_create(authorization_token,
+                                              authority_selector);
+  if (!self->c_creds) {
+    Py_DECREF(self);
+    PyErr_SetString(PyExc_RuntimeError, "couldn't create IAM credentials");
+    return NULL;
+  }
+  return self;
+}
+

src/python/src/grpc/_adapter/_c/types/completion_queue.c

@@ -0,0 +1,124 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+
+
+PyMethodDef pygrpc_CompletionQueue_methods[] = {
+    {"next", (PyCFunction)pygrpc_CompletionQueue_next, METH_KEYWORDS, ""},
+    {"shutdown", (PyCFunction)pygrpc_CompletionQueue_shutdown, METH_NOARGS, ""},
+    {NULL}
+};
+const char pygrpc_CompletionQueue_doc[] =
+    "See grpc._adapter._types.CompletionQueue.";
+PyTypeObject pygrpc_CompletionQueue_type = {
+    PyObject_HEAD_INIT(NULL)
+    0,                                        /* ob_size */
+    "CompletionQueue",                        /* tp_name */
+    sizeof(CompletionQueue),                  /* tp_basicsize */
+    0,                                        /* tp_itemsize */
+    (destructor)pygrpc_CompletionQueue_dealloc, /* tp_dealloc */
+    0,                                        /* tp_print */
+    0,                                        /* tp_getattr */
+    0,                                        /* tp_setattr */
+    0,                                        /* tp_compare */
+    0,                                        /* tp_repr */
+    0,                                        /* tp_as_number */
+    0,                                        /* tp_as_sequence */
+    0,                                        /* tp_as_mapping */
+    0,                                        /* tp_hash */
+    0,                                        /* tp_call */
+    0,                                        /* tp_str */
+    0,                                        /* tp_getattro */
+    0,                                        /* tp_setattro */
+    0,                                        /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+    pygrpc_CompletionQueue_doc,               /* tp_doc */
+    0,                                        /* tp_traverse */
+    0,                                        /* tp_clear */
+    0,                                        /* tp_richcompare */
+    0,                                        /* tp_weaklistoffset */
+    0,                                        /* tp_iter */
+    0,                                        /* tp_iternext */
+    pygrpc_CompletionQueue_methods,           /* tp_methods */
+    0,                                        /* tp_members */
+    0,                                        /* tp_getset */
+    0,                                        /* tp_base */
+    0,                                        /* tp_dict */
+    0,                                        /* tp_descr_get */
+    0,                                        /* tp_descr_set */
+    0,                                        /* tp_dictoffset */
+    0,                                        /* tp_init */
+    0,                                        /* tp_alloc */
+    (newfunc)pygrpc_CompletionQueue_new       /* tp_new */
+};
+
+CompletionQueue *pygrpc_CompletionQueue_new(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  CompletionQueue *self = (CompletionQueue *)type->tp_alloc(type, 0);
+  self->c_cq = grpc_completion_queue_create();
+  return self;
+}
+
+void pygrpc_CompletionQueue_dealloc(CompletionQueue *self) {
+  grpc_completion_queue_destroy(self->c_cq);
+  self->ob_type->tp_free((PyObject *)self);
+}
+
+PyObject *pygrpc_CompletionQueue_next(
+    CompletionQueue *self, PyObject *args, PyObject *kwargs) {
+  double deadline;
+  grpc_event event;
+  PyObject *transliterated_event;
+  static char *keywords[] = {"deadline", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "d:next", keywords,
+                                   &deadline)) {
+    return NULL;
+  }
+  Py_BEGIN_ALLOW_THREADS;
+  event = grpc_completion_queue_next(
+      self->c_cq, pygrpc_cast_double_to_gpr_timespec(deadline));
+  Py_END_ALLOW_THREADS;
+  transliterated_event = pygrpc_consume_event(event);
+  return transliterated_event;
+}
+
+PyObject *pygrpc_CompletionQueue_shutdown(
+    CompletionQueue *self, PyObject *ignored) {
+  grpc_completion_queue_shutdown(self->c_cq);
+  Py_RETURN_NONE;
+}

src/python/src/grpc/_adapter/_c/types/server.c

@@ -0,0 +1,183 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+
+
+PyMethodDef pygrpc_Server_methods[] = {
+    {"request_call", (PyCFunction)pygrpc_Server_request_call,
+     METH_KEYWORDS, ""},
+    {"add_http2_port", (PyCFunction)pygrpc_Server_add_http2_port,
+     METH_KEYWORDS, ""},
+    {"start", (PyCFunction)pygrpc_Server_start, METH_NOARGS, ""},
+    {"shutdown", (PyCFunction)pygrpc_Server_shutdown, METH_KEYWORDS, ""},
+    {NULL}
+};
+const char pygrpc_Server_doc[] = "See grpc._adapter._types.Server.";
+PyTypeObject pygrpc_Server_type = {
+    PyObject_HEAD_INIT(NULL)
+    0,                                        /* ob_size */
+    "Server",                                 /* tp_name */
+    sizeof(Server),                           /* tp_basicsize */
+    0,                                        /* tp_itemsize */
+    (destructor)pygrpc_Server_dealloc,        /* tp_dealloc */
+    0,                                        /* tp_print */
+    0,                                        /* tp_getattr */
+    0,                                        /* tp_setattr */
+    0,                                        /* tp_compare */
+    0,                                        /* tp_repr */
+    0,                                        /* tp_as_number */
+    0,                                        /* tp_as_sequence */
+    0,                                        /* tp_as_mapping */
+    0,                                        /* tp_hash */
+    0,                                        /* tp_call */
+    0,                                        /* tp_str */
+    0,                                        /* tp_getattro */
+    0,                                        /* tp_setattro */
+    0,                                        /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+    pygrpc_Server_doc,                        /* tp_doc */
+    0,                                        /* tp_traverse */
+    0,                                        /* tp_clear */
+    0,                                        /* tp_richcompare */
+    0,                                        /* tp_weaklistoffset */
+    0,                                        /* tp_iter */
+    0,                                        /* tp_iternext */
+    pygrpc_Server_methods,                    /* tp_methods */
+    0,                                        /* tp_members */
+    0,                                        /* tp_getset */
+    0,                                        /* tp_base */
+    0,                                        /* tp_dict */
+    0,                                        /* tp_descr_get */
+    0,                                        /* tp_descr_set */
+    0,                                        /* tp_dictoffset */
+    0,                                        /* tp_init */
+    0,                                        /* tp_alloc */
+    (newfunc)pygrpc_Server_new                /* tp_new */
+};
+
+Server *pygrpc_Server_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  Server *self;
+  CompletionQueue *cq;
+  PyObject *py_args;
+  grpc_channel_args c_args;
+  char *keywords[] = {"cq", "args", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O!O:Channel", keywords,
+        &pygrpc_CompletionQueue_type, &cq, &py_args)) {
+    return NULL;
+  }
+  if (!pygrpc_produce_channel_args(py_args, &c_args)) {
+    return NULL;
+  }
+  self = (Server *)type->tp_alloc(type, 0);
+  self->c_serv = grpc_server_create(&c_args);
+  pygrpc_discard_channel_args(c_args);
+  self->cq = cq;
+  Py_INCREF(self->cq);
+  return self;
+}
+
+void pygrpc_Server_dealloc(Server *self) {
+  grpc_server_destroy(self->c_serv);
+  Py_XDECREF(self->cq);
+  self->ob_type->tp_free((PyObject *)self);
+}
+
+PyObject *pygrpc_Server_request_call(
+    Server *self, PyObject *args, PyObject *kwargs) {
+  CompletionQueue *cq;
+  PyObject *user_tag;
+  pygrpc_tag *tag;
+  Call *empty_call;
+  grpc_call_error errcode;
+  static char *keywords[] = {"cq", "tag", NULL};
+  if (!PyArg_ParseTupleAndKeywords(
+      args, kwargs, "O!O", keywords,
+      &pygrpc_CompletionQueue_type, &cq, &user_tag)) {
+    return NULL;
+  }
+  empty_call = pygrpc_Call_new_empty(cq);
+  tag = pygrpc_produce_request_tag(user_tag, empty_call);
+  errcode = grpc_server_request_call(
+      self->c_serv, &tag->call->c_call, &tag->request_call_details,
+      &tag->request_metadata, tag->call->cq->c_cq, self->cq->c_cq, tag);
+  Py_DECREF(empty_call);
+  return PyInt_FromLong(errcode);
+}
+
+PyObject *pygrpc_Server_add_http2_port(
+    Server *self, PyObject *args, PyObject *kwargs) {
+  const char *addr;
+  ServerCredentials *creds = NULL;
+  int port;
+  static char *keywords[] = {"addr", "creds", NULL};
+  if (!PyArg_ParseTupleAndKeywords(
+      args, kwargs, "s|O!:add_http2_port", keywords,
+      &addr, &pygrpc_ServerCredentials_type, &creds)) {
+    return NULL;
+  }
+  if (creds) {
+    port = grpc_server_add_secure_http2_port(
+        self->c_serv, addr, creds->c_creds);
+  } else {
+    port = grpc_server_add_http2_port(self->c_serv, addr);
+  }
+  return PyInt_FromLong(port);
+
+}
+
+PyObject *pygrpc_Server_start(Server *self, PyObject *ignored) {
+  grpc_server_start(self->c_serv);
+  Py_RETURN_NONE;
+}
+
+PyObject *pygrpc_Server_shutdown(
+    Server *self, PyObject *args, PyObject *kwargs) {
+  PyObject *user_tag = NULL;
+  pygrpc_tag *tag;
+  static char *keywords[] = {"tag", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|O", keywords, &user_tag)) {
+    return NULL;
+  }
+  if (user_tag) {
+    tag = pygrpc_produce_server_shutdown_tag(user_tag);
+    grpc_server_shutdown_and_notify(self->c_serv, tag);
+  } else {
+    grpc_server_shutdown(self->c_serv);
+  }
+  Py_RETURN_NONE;
+}

src/python/src/grpc/_adapter/_c/types/server_credentials.c

@@ -0,0 +1,146 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "grpc/_adapter/_c/types.h"
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+#include <grpc/grpc_security.h>
+#include <grpc/support/alloc.h>
+
+
+PyMethodDef pygrpc_ServerCredentials_methods[] = {
+    {"ssl", (PyCFunction)pygrpc_ServerCredentials_ssl,
+     METH_CLASS|METH_KEYWORDS, ""},
+    {"fake_transport_security",
+     (PyCFunction)pygrpc_ServerCredentials_fake_transport_security,
+     METH_CLASS|METH_NOARGS, ""},
+    {NULL}
+};
+const char pygrpc_ServerCredentials_doc[] = "";
+PyTypeObject pygrpc_ServerCredentials_type = {
+    PyObject_HEAD_INIT(NULL)
+    0,                                        /* ob_size */
+    "ServerCredentials",                      /* tp_name */
+    sizeof(ServerCredentials),                /* tp_basicsize */
+    0,                                        /* tp_itemsize */
+    (destructor)pygrpc_ServerCredentials_dealloc, /* tp_dealloc */
+    0,                                        /* tp_print */
+    0,                                        /* tp_getattr */
+    0,                                        /* tp_setattr */
+    0,                                        /* tp_compare */
+    0,                                        /* tp_repr */
+    0,                                        /* tp_as_number */
+    0,                                        /* tp_as_sequence */
+    0,                                        /* tp_as_mapping */
+    0,                                        /* tp_hash */
+    0,                                        /* tp_call */
+    0,                                        /* tp_str */
+    0,                                        /* tp_getattro */
+    0,                                        /* tp_setattro */
+    0,                                        /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
+    pygrpc_ServerCredentials_doc,             /* tp_doc */
+    0,                                        /* tp_traverse */
+    0,                                        /* tp_clear */
+    0,                                        /* tp_richcompare */
+    0,                                        /* tp_weaklistoffset */
+    0,                                        /* tp_iter */
+    0,                                        /* tp_iternext */
+    pygrpc_ServerCredentials_methods,         /* tp_methods */
+    0,                                        /* tp_members */
+    0,                                        /* tp_getset */
+    0,                                        /* tp_base */
+    0,                                        /* tp_dict */
+    0,                                        /* tp_descr_get */
+    0,                                        /* tp_descr_set */
+    0,                                        /* tp_dictoffset */
+    0,                                        /* tp_init */
+    0,                                        /* tp_alloc */
+    0                                         /* tp_new */
+};
+
+void pygrpc_ServerCredentials_dealloc(ServerCredentials *self) {
+  grpc_server_credentials_release(self->c_creds);
+  self->ob_type->tp_free((PyObject *)self);
+}
+
+ServerCredentials *pygrpc_ServerCredentials_ssl(
+    PyTypeObject *type, PyObject *args, PyObject *kwargs) {
+  ServerCredentials *self;
+  const char *root_certs;
+  PyObject *py_key_cert_pairs;
+  grpc_ssl_pem_key_cert_pair *key_cert_pairs;
+  size_t num_key_cert_pairs;
+  size_t i;
+  static char *keywords[] = {"root_certs", "key_cert_pairs", NULL};
+  if (!PyArg_ParseTupleAndKeywords(args, kwargs, "zO:ssl", keywords,
+        &root_certs, &py_key_cert_pairs)) {
+    return NULL;
+  }
+  if (!PyList_Check(py_key_cert_pairs)) {
+    PyErr_SetString(PyExc_TypeError, "expected a list of 2-tuples of strings");
+    return NULL;
+  }
+  num_key_cert_pairs = PyList_Size(py_key_cert_pairs);
+  key_cert_pairs =
+      gpr_malloc(sizeof(grpc_ssl_pem_key_cert_pair) * num_key_cert_pairs);
+  for (i = 0; i < num_key_cert_pairs; ++i) {
+    PyObject *item = PyList_GET_ITEM(py_key_cert_pairs, i);
+    const char *key;
+    const char *cert;
+    if (!PyArg_ParseTuple(item, "zz", &key, &cert)) {
+      gpr_free(key_cert_pairs);
+      PyErr_SetString(PyExc_TypeError,
+                      "expected a list of 2-tuples of strings");
+      return NULL;
+    }
+    key_cert_pairs[i].private_key = key;
+    key_cert_pairs[i].cert_chain = cert;
+  }
+
+  self = (ServerCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_ssl_server_credentials_create(
+      root_certs, key_cert_pairs, num_key_cert_pairs);
+  gpr_free(key_cert_pairs);
+  return self;
+}
+
+ServerCredentials *pygrpc_ServerCredentials_fake_transport_security(
+    PyTypeObject *type, PyObject *ignored) {
+  ServerCredentials *self = (ServerCredentials *)type->tp_alloc(type, 0);
+  self->c_creds = grpc_fake_transport_security_server_credentials_create();
+  return self;
+}
+

src/python/src/grpc/_adapter/_c/utility.c

@@ -0,0 +1,460 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <math.h>
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/slice.h>
+#include <grpc/support/time.h>
+
+#include "grpc/_adapter/_c/types.h"
+
+pygrpc_tag *pygrpc_produce_batch_tag(
+    PyObject *user_tag, Call *call, grpc_op *ops, size_t nops) {
+  pygrpc_tag *tag = gpr_malloc(sizeof(pygrpc_tag));
+  tag->user_tag = user_tag;
+  Py_XINCREF(tag->user_tag);
+  tag->call = call;
+  Py_XINCREF(tag->call);
+  tag->ops = gpr_malloc(sizeof(grpc_op)*nops);
+  memcpy(tag->ops, ops, sizeof(grpc_op)*nops);
+  tag->nops = nops;
+  grpc_call_details_init(&tag->request_call_details);
+  grpc_metadata_array_init(&tag->request_metadata);
+  tag->is_new_call = 0;
+  return tag;
+}
+
+pygrpc_tag *pygrpc_produce_request_tag(PyObject *user_tag, Call *empty_call) {
+  pygrpc_tag *tag = gpr_malloc(sizeof(pygrpc_tag));
+  tag->user_tag = user_tag;
+  Py_XINCREF(tag->user_tag);
+  tag->call = empty_call;
+  Py_XINCREF(tag->call);
+  tag->ops = NULL;
+  tag->nops = 0;
+  grpc_call_details_init(&tag->request_call_details);
+  grpc_metadata_array_init(&tag->request_metadata);
+  tag->is_new_call = 1;
+  return tag;
+}
+
+pygrpc_tag *pygrpc_produce_server_shutdown_tag(PyObject *user_tag) {
+  pygrpc_tag *tag = gpr_malloc(sizeof(pygrpc_tag));
+  tag->user_tag = user_tag;
+  Py_XINCREF(tag->user_tag);
+  tag->call = NULL;
+  tag->ops = NULL;
+  tag->nops = 0;
+  grpc_call_details_init(&tag->request_call_details);
+  grpc_metadata_array_init(&tag->request_metadata);
+  tag->is_new_call = 0;
+  return tag;
+}
+
+void pygrpc_discard_tag(pygrpc_tag *tag) {
+  if (!tag) {
+    return;
+  }
+  Py_XDECREF(tag->user_tag);
+  Py_XDECREF(tag->call);
+  gpr_free(tag->ops);
+  grpc_call_details_destroy(&tag->request_call_details);
+  grpc_metadata_array_destroy(&tag->request_metadata);
+  gpr_free(tag);
+}
+
+PyObject *pygrpc_consume_event(grpc_event event) {
+  pygrpc_tag *tag;
+  PyObject *result;
+  if (event.type == GRPC_QUEUE_TIMEOUT) {
+    Py_RETURN_NONE;
+  }
+  tag = event.tag;
+  switch (event.type) {
+  case GRPC_QUEUE_SHUTDOWN:
+    result = Py_BuildValue("iOOOOO", GRPC_QUEUE_SHUTDOWN,
+                           Py_None, Py_None, Py_None, Py_None, Py_True);
+    break;
+  case GRPC_OP_COMPLETE:
+    if (tag->is_new_call) {
+      result = Py_BuildValue(
+          "iOO(ssd)[(iNOOOO)]O", GRPC_OP_COMPLETE, tag->user_tag, tag->call,
+          tag->request_call_details.method, tag->request_call_details.host,
+          pygrpc_cast_gpr_timespec_to_double(tag->request_call_details.deadline),
+          GRPC_OP_RECV_INITIAL_METADATA,
+          pygrpc_cast_metadata_array_to_pylist(tag->request_metadata), Py_None,
+          Py_None, Py_None, Py_None,
+          event.success ? Py_True : Py_False);
+    } else {
+      result = Py_BuildValue("iOOONO", GRPC_OP_COMPLETE, tag->user_tag,
+          tag->call, Py_None, pygrpc_consume_ops(tag->ops, tag->nops),
+          event.success ? Py_True : Py_False);
+    }
+    break;
+  default:
+    PyErr_SetString(PyExc_ValueError,
+                    "unknown completion type; could not translate event");
+    return NULL;
+  }
+  pygrpc_discard_tag(tag);
+  return result;
+}
+
+int pygrpc_produce_op(PyObject *op, grpc_op *result) {
+  static const int OP_TUPLE_SIZE = 5;
+  static const int STATUS_TUPLE_SIZE = 2;
+  static const int TYPE_INDEX = 0;
+  static const int INITIAL_METADATA_INDEX = 1;
+  static const int TRAILING_METADATA_INDEX = 2;
+  static const int MESSAGE_INDEX = 3;
+  static const int STATUS_INDEX = 4;
+  static const int STATUS_CODE_INDEX = 0;
+  static const int STATUS_DETAILS_INDEX = 1;
+  grpc_op c_op;
+  if (!PyTuple_Check(op)) {
+    PyErr_SetString(PyExc_TypeError, "expected tuple op");
+    return 0;
+  }
+  if (PyTuple_Size(op) != OP_TUPLE_SIZE) {
+    char buf[64];
+    snprintf(buf, sizeof(buf), "expected tuple op of length %d", OP_TUPLE_SIZE);
+    PyErr_SetString(PyExc_ValueError, buf);
+    return 0;
+  }
+  int type = PyInt_AsLong(PyTuple_GET_ITEM(op, TYPE_INDEX));
+  if (PyErr_Occurred()) {
+    return 0;
+  }
+  Py_ssize_t message_size;
+  char *message;
+  char *status_details;
+  gpr_slice message_slice;
+  c_op.op = type;
+  switch (type) {
+  case GRPC_OP_SEND_INITIAL_METADATA:
+    if (!pygrpc_cast_pylist_to_send_metadata(
+            PyTuple_GetItem(op, INITIAL_METADATA_INDEX),
+            &c_op.data.send_initial_metadata.metadata,
+            &c_op.data.send_initial_metadata.count)) {
+      return 0;
+    }
+    break;
+  case GRPC_OP_SEND_MESSAGE:
+    PyString_AsStringAndSize(
+        PyTuple_GET_ITEM(op, MESSAGE_INDEX), &message, &message_size);
+    message_slice = gpr_slice_from_copied_buffer(message, message_size);
+    c_op.data.send_message = grpc_byte_buffer_create(&message_slice, 1);
+    gpr_slice_unref(message_slice);
+    break;
+  case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+    /* Don't need to fill in any other fields. */
+    break;
+  case GRPC_OP_SEND_STATUS_FROM_SERVER:
+    if (!pygrpc_cast_pylist_to_send_metadata(
+            PyTuple_GetItem(op, TRAILING_METADATA_INDEX),
+            &c_op.data.send_status_from_server.trailing_metadata,
+            &c_op.data.send_status_from_server.trailing_metadata_count)) {
+      return 0;
+    }
+    if (!PyTuple_Check(PyTuple_GET_ITEM(op, STATUS_INDEX))) {
+      char buf[64];
+      snprintf(buf, sizeof(buf), "expected tuple status in op of length %d",
+               STATUS_TUPLE_SIZE);
+      PyErr_SetString(PyExc_TypeError, buf);
+      return 0;
+    }
+    c_op.data.send_status_from_server.status = PyInt_AsLong(
+        PyTuple_GET_ITEM(PyTuple_GET_ITEM(op, STATUS_INDEX), STATUS_CODE_INDEX));
+    status_details = PyString_AsString(
+        PyTuple_GET_ITEM(PyTuple_GET_ITEM(op, STATUS_INDEX), STATUS_DETAILS_INDEX));
+    if (PyErr_Occurred()) {
+      return 0;
+    }
+    c_op.data.send_status_from_server.status_details =
+        gpr_malloc(strlen(status_details) + 1);
+    strcpy((char *)c_op.data.send_status_from_server.status_details,
+           status_details);
+    break;
+  case GRPC_OP_RECV_INITIAL_METADATA:
+    c_op.data.recv_initial_metadata = gpr_malloc(sizeof(grpc_metadata_array));
+    grpc_metadata_array_init(c_op.data.recv_initial_metadata);
+    break;
+  case GRPC_OP_RECV_MESSAGE:
+    c_op.data.recv_message = gpr_malloc(sizeof(grpc_byte_buffer *));
+    break;
+  case GRPC_OP_RECV_STATUS_ON_CLIENT:
+    c_op.data.recv_status_on_client.trailing_metadata =
+        gpr_malloc(sizeof(grpc_metadata_array));
+    grpc_metadata_array_init(c_op.data.recv_status_on_client.trailing_metadata);
+    c_op.data.recv_status_on_client.status =
+        gpr_malloc(sizeof(grpc_status_code *));
+    c_op.data.recv_status_on_client.status_details =
+        gpr_malloc(sizeof(char *));
+    *c_op.data.recv_status_on_client.status_details = NULL;
+    c_op.data.recv_status_on_client.status_details_capacity =
+        gpr_malloc(sizeof(size_t));
+    *c_op.data.recv_status_on_client.status_details_capacity = 0;
+    break;
+  case GRPC_OP_RECV_CLOSE_ON_SERVER:
+    c_op.data.recv_close_on_server.cancelled = gpr_malloc(sizeof(int));
+    break;
+  default:
+    return 0;
+  }
+  *result = c_op;
+  return 1;
+}
+
+void pygrpc_discard_op(grpc_op op) {
+  switch(op.op) {
+  case GRPC_OP_SEND_INITIAL_METADATA:
+    gpr_free(op.data.send_initial_metadata.metadata);
+    break;
+  case GRPC_OP_SEND_MESSAGE:
+    grpc_byte_buffer_destroy(op.data.send_message);
+    break;
+  case GRPC_OP_SEND_CLOSE_FROM_CLIENT:
+    /* Don't need to free any fields. */
+    break;
+  case GRPC_OP_SEND_STATUS_FROM_SERVER:
+    gpr_free(op.data.send_status_from_server.trailing_metadata);
+    gpr_free((char *)op.data.send_status_from_server.status_details);
+    break;
+  case GRPC_OP_RECV_INITIAL_METADATA:
+    grpc_metadata_array_destroy(op.data.recv_initial_metadata);
+    gpr_free(op.data.recv_initial_metadata);
+    break;
+  case GRPC_OP_RECV_MESSAGE:
+    grpc_byte_buffer_destroy(*op.data.recv_message);
+    gpr_free(op.data.recv_message);
+    break;
+  case GRPC_OP_RECV_STATUS_ON_CLIENT:
+    grpc_metadata_array_destroy(op.data.recv_status_on_client.trailing_metadata);
+    gpr_free(op.data.recv_status_on_client.trailing_metadata);
+    gpr_free(op.data.recv_status_on_client.status);
+    gpr_free(*op.data.recv_status_on_client.status_details);
+    gpr_free(op.data.recv_status_on_client.status_details);
+    gpr_free(op.data.recv_status_on_client.status_details_capacity);
+    break;
+  case GRPC_OP_RECV_CLOSE_ON_SERVER:
+    gpr_free(op.data.recv_close_on_server.cancelled);
+    break;
+  }
+}
+
+PyObject *pygrpc_consume_ops(grpc_op *op, size_t nops) {
+  static const int TYPE_INDEX = 0;
+  static const int INITIAL_METADATA_INDEX = 1;
+  static const int TRAILING_METADATA_INDEX = 2;
+  static const int MESSAGE_INDEX = 3;
+  static const int STATUS_INDEX = 4;
+  static const int CANCELLED_INDEX = 5;
+  static const int OPRESULT_LENGTH = 6;
+  PyObject *list;
+  size_t i;
+  size_t j;
+  char *bytes;
+  size_t bytes_size;
+  PyObject *results = PyList_New(nops);
+  if (!results) {
+    return NULL;
+  }
+  for (i = 0; i < nops; ++i) {
+    PyObject *result = PyTuple_Pack(OPRESULT_LENGTH, Py_None, Py_None, Py_None,
+                                    Py_None, Py_None, Py_None);
+    PyTuple_SetItem(result, TYPE_INDEX, PyInt_FromLong(op[i].op));
+    switch(op[i].op) {
+    case GRPC_OP_RECV_INITIAL_METADATA:
+      PyTuple_SetItem(result, INITIAL_METADATA_INDEX,
+                      list=PyList_New(op[i].data.recv_initial_metadata->count));
+      for (j = 0; j < op[i].data.recv_initial_metadata->count; ++j) {
+        grpc_metadata md = op[i].data.recv_initial_metadata->metadata[j];
+        PyList_SetItem(list, j, Py_BuildValue("ss#", md.key, md.value,
+                                              (Py_ssize_t)md.value_length));
+      }
+      break;
+    case GRPC_OP_RECV_MESSAGE:
+      if (*op[i].data.recv_message) {
+        pygrpc_byte_buffer_to_bytes(
+            *op[i].data.recv_message, &bytes, &bytes_size);
+        PyTuple_SetItem(result, MESSAGE_INDEX,
+                        PyString_FromStringAndSize(bytes, bytes_size));
+        gpr_free(bytes);
+      } else {
+        PyTuple_SetItem(result, MESSAGE_INDEX, Py_BuildValue(""));
+      }
+      break;
+    case GRPC_OP_RECV_STATUS_ON_CLIENT:
+      PyTuple_SetItem(
+          result, TRAILING_METADATA_INDEX,
+          list = PyList_New(op[i].data.recv_status_on_client.trailing_metadata->count));
+      for (j = 0; j < op[i].data.recv_status_on_client.trailing_metadata->count; ++j) {
+        grpc_metadata md =
+            op[i].data.recv_status_on_client.trailing_metadata->metadata[j];
+        PyList_SetItem(list, j, Py_BuildValue("ss#", md.key, md.value,
+                                              (Py_ssize_t)md.value_length));
+      }
+      PyTuple_SetItem(
+          result, STATUS_INDEX, Py_BuildValue(
+              "is", *op[i].data.recv_status_on_client.status,
+              *op[i].data.recv_status_on_client.status_details));
+      break;
+    case GRPC_OP_RECV_CLOSE_ON_SERVER:
+      PyTuple_SetItem(
+          result, CANCELLED_INDEX,
+          PyBool_FromLong(*op[i].data.recv_close_on_server.cancelled));
+      break;
+    default:
+      break;
+    }
+    pygrpc_discard_op(op[i]);
+    PyList_SetItem(results, i, result);
+  }
+  return results;
+}
+
+double pygrpc_cast_gpr_timespec_to_double(gpr_timespec timespec) {
+  return timespec.tv_sec + 1e-9*timespec.tv_nsec;
+}
+
+gpr_timespec pygrpc_cast_double_to_gpr_timespec(double seconds) {
+  gpr_timespec result;
+  if isinf(seconds) {
+    result = seconds > 0.0 ? gpr_inf_future : gpr_inf_past;
+  } else {
+    result.tv_sec = (time_t)seconds;
+    result.tv_nsec = ((seconds - result.tv_sec) * 1e9);
+  }
+  return result;
+}
+
+int pygrpc_produce_channel_args(PyObject *py_args, grpc_channel_args *c_args) {
+  size_t num_args = PyList_Size(py_args);
+  size_t i;
+  grpc_channel_args args = {num_args, gpr_malloc(sizeof(grpc_arg) * num_args)};
+  for (i = 0; i < args.num_args; ++i) {
+    char *key;
+    PyObject *value;
+    if (!PyArg_ParseTuple(PyList_GetItem(py_args, i), "zO", &key, &value)) {
+      gpr_free(args.args);
+      args.num_args = 0;
+      args.args = NULL;
+      PyErr_SetString(PyExc_TypeError,
+                      "expected a list of 2-tuple of str and str|int|None");
+      return 0;
+    }
+    args.args[i].key = key;
+    if (PyInt_Check(value)) {
+      args.args[i].type = GRPC_ARG_INTEGER;
+      args.args[i].value.integer = PyInt_AsLong(value);
+    } else if (PyString_Check(value)) {
+      args.args[i].type = GRPC_ARG_STRING;
+      args.args[i].value.string = PyString_AsString(value);
+    } else if (value == Py_None) {
+      --args.num_args;
+      --i;
+      continue;
+    } else {
+      gpr_free(args.args);
+      args.num_args = 0;
+      args.args = NULL;
+      PyErr_SetString(PyExc_TypeError,
+                      "expected a list of 2-tuple of str and str|int|None");
+      return 0;
+    }
+  }
+  *c_args = args;
+  return 1;
+}
+
+void pygrpc_discard_channel_args(grpc_channel_args args) {
+  gpr_free(args.args);
+}
+
+int pygrpc_cast_pylist_to_send_metadata(
+    PyObject *pylist, grpc_metadata **metadata, size_t *count) {
+  size_t i;
+  Py_ssize_t value_length;
+  *count = PyList_Size(pylist);
+  *metadata = gpr_malloc(sizeof(grpc_metadata) * *count);
+  for (i = 0; i < *count; ++i) {
+    if (!PyArg_ParseTuple(
+        PyList_GetItem(pylist, i), "ss#",
+        &(*metadata)[i].key, &(*metadata)[i].value, &value_length)) {
+      gpr_free(*metadata);
+      *count = 0;
+      *metadata = NULL;
+      return 0;
+    }
+    (*metadata)[i].value_length = value_length;
+  }
+  return 1;
+}
+
+PyObject *pygrpc_cast_metadata_array_to_pylist(grpc_metadata_array metadata) {
+  PyObject *result = PyList_New(metadata.count);
+  size_t i;
+  for (i = 0; i < metadata.count; ++i) {
+    PyList_SetItem(
+        result, i, Py_BuildValue(
+            "ss#", metadata.metadata[i].key, metadata.metadata[i].value,
+            (Py_ssize_t)metadata.metadata[i].value_length));
+    if (PyErr_Occurred()) {
+      Py_DECREF(result);
+      return NULL;
+    }
+  }
+  return result;
+}
+
+void pygrpc_byte_buffer_to_bytes(
+    grpc_byte_buffer *buffer, char **result, size_t *result_size) {
+  grpc_byte_buffer_reader *reader = grpc_byte_buffer_reader_create(buffer);
+  gpr_slice slice;
+  char *read_result = NULL;
+  size_t size = 0;
+  while (grpc_byte_buffer_reader_next(reader, &slice)) {
+    read_result = gpr_realloc(read_result, size + GPR_SLICE_LENGTH(slice));
+    memcpy(read_result + size, GPR_SLICE_START_PTR(slice),
+           GPR_SLICE_LENGTH(slice));
+    size = size + GPR_SLICE_LENGTH(slice);
+    gpr_slice_unref(slice);
+  }
+  grpc_byte_buffer_reader_destroy(reader);
+  *result_size = size;
+  *result = read_result;
+}

src/python/src/grpc/_adapter/_c_test.py

@@ -27,192 +27,40 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""Tests for _adapter._c."""
-
-import threading
 import time
 import unittest
 
 from grpc._adapter import _c
-from grpc._adapter import _datatypes
-
-_TIMEOUT = 3
-_FUTURE = time.time() + 60 * 60 * 24
-_IDEMPOTENCE_DEMONSTRATION = 7
-
-
-class _CTest(unittest.TestCase):
-
-  def testUpAndDown(self):
-    _c.init()
-    _c.shut_down()
-
-  def testCompletionQueue(self):
-    _c.init()
-
-    completion_queue = _c.CompletionQueue()
-    event = completion_queue.get(0)
-    self.assertIsNone(event)
-    event = completion_queue.get(time.time())
-    self.assertIsNone(event)
-    event = completion_queue.get(time.time() + _TIMEOUT)
-    self.assertIsNone(event)
-    completion_queue.stop()
-    for _ in range(_IDEMPOTENCE_DEMONSTRATION):
-      event = completion_queue.get(time.time() + _TIMEOUT)
-      self.assertIs(event.kind, _datatypes.Event.Kind.STOP)
-
-    del completion_queue
-    del event
+from grpc._adapter import _types
 
-    _c.shut_down()
 
-  def testChannel(self):
-    _c.init()
-
-    channel = _c.Channel(
-        'test host:12345', None, server_host_override='ignored')
-    del channel
-
-    _c.shut_down()
-
-  def testCall(self):
-    method = 'test method'
-    host = 'test host'
-
-    _c.init()
-
-    channel = _c.Channel('%s:%d' % (host, 12345), None)
-    completion_queue = _c.CompletionQueue()
-    call = _c.Call(channel, completion_queue, method, host,
-                   time.time() + _TIMEOUT)
-    del call
-    del completion_queue
-    del channel
+class CTypeSmokeTest(unittest.TestCase):
 
-    _c.shut_down()
+  def testClientCredentialsUpDown(self):
+    credentials = _c.ClientCredentials.fake_transport_security()
+    del credentials
 
-  def testServer(self):
-    _c.init()
+  def testServerCredentialsUpDown(self):
+    credentials = _c.ServerCredentials.fake_transport_security()
+    del credentials
 
+  def testCompletionQueueUpDown(self):
     completion_queue = _c.CompletionQueue()
-    server = _c.Server(completion_queue)
-    server.add_http2_addr('[::]:0')
-    server.start()
-    server.stop()
-    completion_queue.stop()
-    del server
     del completion_queue
 
-    service_tag = object()
+  def testServerUpDown(self):
     completion_queue = _c.CompletionQueue()
-    server = _c.Server(completion_queue)
-    server.add_http2_addr('[::]:0')
-    server.start()
-    server.service(service_tag)
-    server.stop()
-    completion_queue.stop()
-    event = completion_queue.get(time.time() + _TIMEOUT)
-    self.assertIs(event.kind, _datatypes.Event.Kind.SERVICE_ACCEPTED)
-    self.assertIs(event.tag, service_tag)
-    self.assertIsNone(event.service_acceptance)
-    for _ in range(_IDEMPOTENCE_DEMONSTRATION):
-      event = completion_queue.get(time.time() + _TIMEOUT)
-      self.assertIs(event.kind, _datatypes.Event.Kind.STOP)
-    del server
+    serv = _c.Server(completion_queue, [])
+    del serv
     del completion_queue
 
-    completion_queue = _c.CompletionQueue()
-    server = _c.Server(completion_queue)
-    server.add_http2_addr('[::]:0')
-    server.start()
-    thread = threading.Thread(target=completion_queue.get, args=(_FUTURE,))
-    thread.start()
-    time.sleep(1)
-    server.stop()
-    completion_queue.stop()
-    for _ in range(_IDEMPOTENCE_DEMONSTRATION):
-      event = completion_queue.get(time.time() + _TIMEOUT)
-      self.assertIs(event.kind, _datatypes.Event.Kind.STOP)
-    thread.join()
-    del server
-    del completion_queue
-
-    _c.shut_down()
-
-  def test_client_credentials(self):
-    root_certificates = b'Trust starts here. Really.'
-    private_key = b'This is a really bad private key, yo.'
-    certificate_chain = b'Trust me! Do I not look trustworty?'
-
-    _c.init()
-
-    client_credentials = _c.ClientCredentials(
-        None, None, None)
-    self.assertIsNotNone(client_credentials)
-    client_credentials = _c.ClientCredentials(
-        root_certificates, None, None)
-    self.assertIsNotNone(client_credentials)
-    client_credentials = _c.ClientCredentials(
-        None, private_key, certificate_chain)
-    self.assertIsNotNone(client_credentials)
-    client_credentials = _c.ClientCredentials(
-        root_certificates, private_key, certificate_chain)
-    self.assertIsNotNone(client_credentials)
-    del client_credentials
-
-    _c.shut_down()
-
-  def test_server_credentials(self):
-    root_certificates = b'Trust starts here. Really.'
-    first_private_key = b'This is a really bad private key, yo.'
-    first_certificate_chain = b'Trust me! Do I not look trustworty?'
-    second_private_key = b'This is another bad private key, yo.'
-    second_certificate_chain = b'Look into my eyes; you can totes trust me.'
-
-    _c.init()
-
-    server_credentials = _c.ServerCredentials(
-        None, ((first_private_key, first_certificate_chain),))
-    del server_credentials
-    server_credentials = _c.ServerCredentials(
-        root_certificates, ((first_private_key, first_certificate_chain),))
-    del server_credentials
-    server_credentials = _c.ServerCredentials(
-        root_certificates,
-        ((first_private_key, first_certificate_chain),
-         (second_private_key, second_certificate_chain),))
-    del server_credentials
-    with self.assertRaises(TypeError):
-      _c.ServerCredentials(
-          root_certificates, first_private_key, second_certificate_chain)
-
-    _c.shut_down()
-
-  @unittest.skip('TODO(nathaniel): find and use real-enough test credentials')
-  def test_secure_server(self):
-    _c.init()
-
-    server_credentials = _c.ServerCredentials(
-        'root certificate', (('private key', 'certificate chain'),))
-
-    completion_queue = _c.CompletionQueue()
-    server = _c.Server(completion_queue, server_credentials)
-    server.add_http2_addr('[::]:0')
-    server.start()
-    thread = threading.Thread(target=completion_queue.get, args=(_FUTURE,))
-    thread.start()
-    time.sleep(1)
-    server.stop()
-    completion_queue.stop()
-    for _ in range(_IDEMPOTENCE_DEMONSTRATION):
-      event = completion_queue.get(time.time() + _TIMEOUT)
-      self.assertIs(event.kind, _datatypes.Event.Kind.STOP)
-    thread.join()
-    del server
-    del completion_queue
+  def testChannelUpDown(self):
+    channel = _c.Channel('[::]:0', [])
+    del channel
 
-    _c.shut_down()
+  def testSecureChannelUpDown(self):
+    channel = _c.Channel('[::]:0', [], _c.ClientCredentials.fake_transport_security())
+    del channel
 
 
 if __name__ == '__main__':