Add new files missed in last commit.

src/core/ext/client_config/method_config.c

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+//
+// 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 "src/core/ext/client_config/method_config.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/transport/metadata.h"
+
+//
+// grpc_method_config
+//
+
+struct grpc_method_config {
+  gpr_refcount refs;
+  bool* wait_for_ready;
+  gpr_timespec* timeout;
+  int32_t* max_request_message_bytes;
+  int32_t* max_response_message_bytes;
+};
+
+grpc_method_config* grpc_method_config_create(
+    bool* wait_for_ready, gpr_timespec* timeout,
+    int32_t* max_request_message_bytes, int32_t* max_response_message_bytes) {
+  grpc_method_config* config = gpr_malloc(sizeof(*config));
+  memset(config, 0, sizeof(*config));
+  gpr_ref_init(&config->refs, 1);
+  if (wait_for_ready != NULL) {
+    config->wait_for_ready = gpr_malloc(sizeof(*wait_for_ready));
+    *config->wait_for_ready = *wait_for_ready;
+  }
+  if (timeout != NULL) {
+    config->timeout = gpr_malloc(sizeof(*timeout));
+    *config->timeout = *timeout;
+  }
+  if (max_request_message_bytes != NULL) {
+    config->max_request_message_bytes =
+        gpr_malloc(sizeof(*max_request_message_bytes));
+    *config->max_request_message_bytes = *max_request_message_bytes;
+  }
+  if (max_response_message_bytes != NULL) {
+    config->max_response_message_bytes =
+        gpr_malloc(sizeof(*max_response_message_bytes));
+    *config->max_response_message_bytes = *max_response_message_bytes;
+  }
+  return config;
+}
+
+grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config) {
+  gpr_ref(&method_config->refs);
+  return method_config;
+}
+
+void grpc_method_config_unref(grpc_method_config* method_config) {
+  if (gpr_unref(&method_config->refs)) {
+    gpr_free(method_config->wait_for_ready);
+    gpr_free(method_config->timeout);
+    gpr_free(method_config->max_request_message_bytes);
+    gpr_free(method_config->max_response_message_bytes);
+    gpr_free(method_config);
+  }
+}
+
+bool* grpc_method_config_get_wait_for_ready(grpc_method_config* method_config) {
+  return method_config->wait_for_ready;
+}
+
+gpr_timespec* grpc_method_config_get_timeout(
+    grpc_method_config* method_config) {
+  return method_config->timeout;
+}
+
+int32_t* grpc_method_config_get_max_request_message_bytes(
+    grpc_method_config* method_config) {
+  return method_config->max_request_message_bytes;
+}
+
+int32_t* grpc_method_config_get_max_response_message_bytes(
+    grpc_method_config* method_config) {
+  return method_config->max_response_message_bytes;
+}
+
+//
+// grpc_method_config_table
+//
+
+typedef struct grpc_method_config_table_entry {
+  grpc_mdstr* path;
+  grpc_method_config* method_config;
+} grpc_method_config_table_entry;
+
+#define METHOD_CONFIG_TABLE_SIZE 128
+struct grpc_method_config_table {
+  gpr_refcount refs;
+  grpc_method_config_table_entry entries[METHOD_CONFIG_TABLE_SIZE];
+};
+
+grpc_method_config_table* grpc_method_config_table_create() {
+  grpc_method_config_table* table = gpr_malloc(sizeof(*table));
+  memset(table, 0, sizeof(*table));
+  gpr_ref_init(&table->refs, 1);
+  return table;
+}
+
+grpc_method_config_table* grpc_method_config_table_ref(
+    grpc_method_config_table* table) {
+  if (table != NULL) gpr_ref(&table->refs);
+  return table;
+}
+
+void grpc_method_config_table_unref(grpc_method_config_table* table) {
+  if (table != NULL && gpr_unref(&table->refs)) {
+    for (size_t i = 0; i < GPR_ARRAY_SIZE(table->entries); ++i) {
+      grpc_method_config_table_entry* entry = &table->entries[i];
+      if (entry->path != NULL) {
+        GRPC_MDSTR_UNREF(entry->path);
+        grpc_method_config_unref(entry->method_config);
+      }
+    }
+  }
+}
+
+// Helper function for insert and get operations that performs quadratic
+// probing (https://en.wikipedia.org/wiki/Quadratic_probing).
+static size_t grpc_method_config_table_find_index(
+    grpc_method_config_table* table, grpc_mdstr* path, bool find_empty) {
+  for (size_t i = 0; i < GPR_ARRAY_SIZE(table->entries); ++i) {
+    const size_t idx = (path->hash + i * i) % GPR_ARRAY_SIZE(table->entries);
+    if (table->entries[idx].path == NULL)
+      return find_empty ? idx : GPR_ARRAY_SIZE(table->entries);
+    if (table->entries[idx].path == path) return idx;
+  }
+  return GPR_ARRAY_SIZE(table->entries) + 1;  // Not found.
+}
+
+static void grpc_method_config_table_insert(grpc_method_config_table* table,
+                                            grpc_mdstr* path,
+                                            grpc_method_config* config) {
+  const size_t idx =
+      grpc_method_config_table_find_index(table, path, true /* find_empty */);
+  // This can happen if the table is full.
+  GPR_ASSERT(idx != GPR_ARRAY_SIZE(table->entries));
+  grpc_method_config_table_entry* entry = &table->entries[idx];
+  entry->path = GRPC_MDSTR_REF(path);
+  entry->method_config = grpc_method_config_ref(config);
+}
+
+static grpc_method_config* grpc_method_config_table_get(
+    grpc_method_config_table* table, grpc_mdstr* path) {
+  const size_t idx =
+      grpc_method_config_table_find_index(table, path, false /* find_empty */);
+  if (idx == GPR_ARRAY_SIZE(table->entries)) return NULL;  // Not found.
+  return table->entries[idx].method_config;
+}
+
+void grpc_method_config_table_add_method_config(
+    grpc_method_config_table* table, grpc_mdstr** paths, size_t num_paths,
+    grpc_method_config* method_config) {
+  for (size_t i = 0; i < num_paths; ++i) {
+    grpc_method_config_table_insert(table, paths[i], method_config);
+  }
+}
+
+grpc_method_config* grpc_method_config_table_get_method_config(
+    grpc_method_config_table* table, grpc_mdstr* path) {
+  grpc_method_config* method_config = grpc_method_config_table_get(table, path);
+  // If we didn't find a match for the path, try looking for a wildcard
+  // entry (i.e., change "/service/method" to "/service/*").
+  if (method_config == NULL) {
+    const char* path_str = grpc_mdstr_as_c_string(path);
+    const char* sep = strrchr(path_str, '/') + 1;
+    const size_t len = (size_t)(sep - path_str);
+    char buf[len + 2];  // '*' and NUL
+    memcpy(buf, path_str, len);
+    buf[len] = '*';
+    buf[len + 1] = '\0';
+    grpc_mdstr* wildcard_path = grpc_mdstr_from_string(buf);
+    method_config = grpc_method_config_table_get(table, wildcard_path);
+    GRPC_MDSTR_UNREF(wildcard_path);
+  }
+  return grpc_method_config_ref(method_config);
+}

src/core/ext/client_config/method_config.h

@@ -0,0 +1,85 @@
+//
+// Copyright 2016, 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_CORE_EXT_CLIENT_CONFIG_METHOD_CONFIG_H
+#define GRPC_CORE_EXT_CLIENT_CONFIG_METHOD_CONFIG_H
+
+#include <stdbool.h>
+
+#include <grpc/impl/codegen/gpr_types.h>
+
+#include "src/core/lib/transport/metadata.h"
+
+/// Per-method configuration.
+typedef struct grpc_method_config grpc_method_config;
+
+/// Any parameter may be NULL to indicate that the value is unset.
+grpc_method_config* grpc_method_config_create(
+    bool* wait_for_ready, gpr_timespec* timeout,
+    int32_t* max_request_message_bytes, int32_t* max_response_message_bytes);
+
+grpc_method_config* grpc_method_config_ref(grpc_method_config* method_config);
+void grpc_method_config_unref(grpc_method_config* method_config);
+
+/// These methods return NULL if the requested field is unset.
+/// The caller does NOT take ownership of the result.
+bool* grpc_method_config_get_wait_for_ready(grpc_method_config* method_config);
+gpr_timespec* grpc_method_config_get_timeout(grpc_method_config* method_config);
+int32_t* grpc_method_config_get_max_request_message_bytes(
+    grpc_method_config* method_config);
+int32_t* grpc_method_config_get_max_response_message_bytes(
+    grpc_method_config* method_config);
+
+/// A table of method configs.
+typedef struct grpc_method_config_table grpc_method_config_table;
+
+grpc_method_config_table* grpc_method_config_table_create();
+
+grpc_method_config_table* grpc_method_config_table_ref(
+    grpc_method_config_table* table);
+void grpc_method_config_table_unref(grpc_method_config_table* table);
+
+/// Adds \a method_config to \a table.  \a paths indicates the set of path
+/// names for which this config applies.  Each name is of one of the
+/// following forms:
+///   service/method -- specifies exact service and method name
+///   service/*      -- matches all methods for the specified service
+/// Takes new references to all elements of \a paths and to \a method_config.
+void grpc_method_config_table_add_method_config(
+    grpc_method_config_table* table, grpc_mdstr** paths, size_t num_paths,
+    grpc_method_config* method_config);
+
+/// Returns NULL if the method has no config.
+/// Caller owns a reference to result.
+grpc_method_config* grpc_method_config_table_get_method_config(
+    grpc_method_config_table* table, grpc_mdstr* path);
+
+#endif /* GRPC_CORE_EXT_CLIENT_CONFIG_METHOD_CONFIG_H */