GRPC Core  4.0.0
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
grpc.h
Go to the documentation of this file.
1 /*
2  *
3  * Copyright 2015-2016, Google Inc.
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met:
9  *
10  * * Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  * * Redistributions in binary form must reproduce the above
13  * copyright notice, this list of conditions and the following disclaimer
14  * in the documentation and/or other materials provided with the
15  * distribution.
16  * * Neither the name of Google Inc. nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  *
32  */
33 
34 #ifndef GRPC_GRPC_H
35 #define GRPC_GRPC_H
36 
37 #include <grpc/status.h>
38 
39 #include <grpc/byte_buffer.h>
43 #include <grpc/slice.h>
44 #include <grpc/support/time.h>
45 #include <stddef.h>
46 
47 #ifdef __cplusplus
48 extern "C" {
49 #endif
50 
60 
63 
72 GRPCAPI void grpc_register_plugin(void (*init)(void), void (*destroy)(void));
73 
80 GRPCAPI void grpc_init(void);
81 
88 GRPCAPI void grpc_shutdown(void);
89 
91 GRPCAPI const char *grpc_version_string(void);
92 
94 GRPCAPI const char *grpc_g_stands_for(void);
95 
100  const grpc_completion_queue_attributes *attributes);
101 
105  void *reserved);
106 
110  void *reserved);
111 
114  const grpc_completion_queue_factory *factory,
115  const grpc_completion_queue_attributes *attributes, void *reserved);
116 
126  gpr_timespec deadline,
127  void *reserved);
128 
141  void *tag, gpr_timespec deadline,
142  void *reserved);
143 
146 #define GRPC_MAX_COMPLETION_QUEUE_PLUCKERS 6
147 
156 
160 
168  gpr_timespec deadline, void *tag);
169 
173 
176 
179  grpc_channel *channel, int try_to_connect);
180 
185  grpc_channel *channel);
186 
193  grpc_channel *channel, grpc_connectivity_state last_observed_state,
194  gpr_timespec deadline, grpc_completion_queue *cq, void *tag);
195 
204  grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask,
205  grpc_completion_queue *completion_queue, grpc_slice method,
206  const grpc_slice *host, gpr_timespec deadline, void *reserved);
207 
211  void *tag, void *reserved);
212 
215  const char *method, const char *host,
216  void *reserved);
217 
221  grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask,
222  grpc_completion_queue *completion_queue, void *registered_call_handle,
223  gpr_timespec deadline, void *reserved);
224 
227 GRPCAPI void *grpc_call_arena_alloc(grpc_call *call, size_t size);
228 
247  const grpc_op *ops, size_t nops,
248  void *tag, void *reserved);
249 
259 
260 struct census_context;
261 
265  struct census_context *context);
266 
269 
273 
279  const grpc_channel_info *channel_info);
280 
287  const char *target, const grpc_channel_args *args, void *reserved);
288 
291  const char *target, grpc_status_code error_code, const char *error_message);
292 
295 
307 GRPCAPI grpc_call_error grpc_call_cancel(grpc_call *call, void *reserved);
308 
316  grpc_status_code status,
317  const char *description,
318  void *reserved);
319 
322 GRPCAPI void grpc_call_ref(grpc_call *call);
323 
326 GRPCAPI void grpc_call_unref(grpc_call *call);
327 
337  grpc_server *server, grpc_call **call, grpc_call_details *details,
338  grpc_metadata_array *request_metadata,
339  grpc_completion_queue *cq_bound_to_call,
340  grpc_completion_queue *cq_for_notification, void *tag_new);
341 
343 typedef enum {
349 
358  grpc_server *server, const char *method, const char *host,
360  uint32_t flags);
361 
366  grpc_server *server, void *registered_method, grpc_call **call,
367  gpr_timespec *deadline, grpc_metadata_array *request_metadata,
368  grpc_byte_buffer **optional_payload,
369  grpc_completion_queue *cq_bound_to_call,
370  grpc_completion_queue *cq_for_notification, void *tag_new);
371 
377  void *reserved);
378 
385  void *reserved);
386 
391  const char *addr);
392 
395 
405  void *tag);
406 
410 
416 
425 GRPCAPI int grpc_tracer_set_enabled(const char *name, int enabled);
426 
429 
433 
436 
439 
442 
445 
448 
451  size_t new_size);
452 
456 
457 #ifdef __cplusplus
458 }
459 #endif
460 
461 #endif /* GRPC_GRPC_H */
struct grpc_call grpc_call
A Call represents an RPC.
Definition: grpc_types.h:86
GRPCAPI grpc_call_error grpc_call_cancel_with_status(grpc_call *call, grpc_status_code status, const char *description, void *reserved)
Called by clients to cancel an RPC on the server.
GRPCAPI void grpc_server_shutdown_and_notify(grpc_server *server, grpc_completion_queue *cq, void *tag)
Begin shutting down a server.
GRPCAPI grpc_completion_queue * grpc_completion_queue_create_for_next(void *reserved)
Helper function to create a completion queue with grpc_cq_completion_type of GRPC_CQ_NEXT and grpc_cq...
GRPCAPI grpc_event grpc_completion_queue_next(grpc_completion_queue *cq, gpr_timespec deadline, void *reserved)
Blocks until an event is available, the completion queue is being shut down, or deadline is reached...
struct grpc_completion_queue_factory grpc_completion_queue_factory
The completion queue factory structure is opaque to the callers of grpc.
Definition: grpc_types.h:613
An array of arguments that can be passed around.
Definition: grpc_types.h:143
Definition: grpc_types.h:101
Read the initial payload as a byte buffer.
Definition: grpc.h:347
struct grpc_channel grpc_channel
The Channel interface allows creation of Call objects.
Definition: grpc_types.h:78
grpc_server_register_method_payload_handling
How to handle payloads for a registered method.
Definition: grpc.h:343
GRPCAPI void grpc_server_register_completion_queue(grpc_server *server, grpc_completion_queue *cq, void *reserved)
Register a completion queue with the server.
GRPCAPI const char * grpc_g_stands_for(void)
Return a string specifying what the 'g' in gRPC stands for.
GRPCAPI const char * grpc_version_string(void)
Return a string representing the current version of grpc.
The result of an operation.
Definition: grpc_types.h:413
GRPCAPI void grpc_channel_ping(grpc_channel *channel, grpc_completion_queue *cq, void *tag, void *reserved)
Ping the channels peer (load balanced channels will select one sub-channel to ping); if the channel i...
GRPCAPI void grpc_alarm_destroy(grpc_alarm *alarm)
Destroy the given completion queue alarm, cancelling it in the process.
GRPCAPI int grpc_channel_num_external_connectivity_watchers(grpc_channel *channel)
Number of active "external connectivity state watchers" attached to a channel.
A grpc_slice s, if initialized, represents the byte range s.bytes[0..s.length-1]. ...
Definition: slice.h:91
GRPCAPI grpc_completion_queue * grpc_completion_queue_create(const grpc_completion_queue_factory *factory, const grpc_completion_queue_attributes *attributes, void *reserved)
Create a completion queue.
GRPCAPI grpc_call_error grpc_call_cancel(grpc_call *call, void *reserved)
Error handling for grpc_call Most grpc_call functions return a grpc_error.
GRPCAPI void grpc_call_details_destroy(grpc_call_details *details)
GRPCAPI void grpc_resource_quota_unref(grpc_resource_quota *resource_quota)
Drop a reference to a buffer pool.
GRPCAPI void grpc_server_start(grpc_server *server)
Start a server - tells all listeners to start listening.
GRPCAPI void grpc_alarm_cancel(grpc_alarm *alarm)
Cancel a completion queue alarm.
struct grpc_server grpc_server
A server listens to some port and responds to request calls.
Definition: grpc_types.h:81
GRPCAPI const grpc_arg_pointer_vtable * grpc_resource_quota_arg_vtable(void)
Fetch a vtable for a grpc_channel_arg that points to a grpc_resource_quota.
Definition: grpc_types.h:433
Definition: grpc_types.h:56
Don't try to read the payload.
Definition: grpc.h:345
GRPCAPI grpc_call_error grpc_server_request_call(grpc_server *server, grpc_call **call, grpc_call_details *details, grpc_metadata_array *request_metadata, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new)
Request notification of a new call.
GRPCAPI char * grpc_call_get_peer(grpc_call *call)
Returns a newly allocated string representing the endpoint to which this call is communicating with...
Definition: grpc_types.h:427
GRPCAPI void grpc_server_cancel_all_calls(grpc_server *server)
Cancel all in-progress calls.
GRPCAPI grpc_connectivity_state grpc_channel_check_connectivity_state(grpc_channel *channel, int try_to_connect)
Check the connectivity state of a channel.
Definition: grpc_types.h:602
grpc_call_error
Result of a grpc call.
Definition: grpc_types.h:311
GRPCAPI char * grpc_channel_get_target(grpc_channel *channel)
Return a newly allocated string representing the target a channel was created for.
GRPCAPI int grpc_is_binary_header(grpc_slice slice)
Check whether a metadata key corresponds to a binary value.
grpc_connectivity_state
Connectivity state of a channel.
Definition: connectivity_state.h:42
GRPCAPI void grpc_channel_get_info(grpc_channel *channel, const grpc_channel_info *channel_info)
Request info about the channel.
GRPCAPI void grpc_call_details_init(grpc_call_details *details)
GRPCAPI grpc_channel * grpc_lame_client_channel_create(const char *target, grpc_status_code error_code, const char *error_message)
Create a lame client: this client fails every operation attempted on it.
GRPCAPI void * grpc_server_register_method(grpc_server *server, const char *method, const char *host, grpc_server_register_method_payload_handling payload_handling, uint32_t flags)
Registers a method in the server.
GRPCAPI grpc_call * grpc_channel_create_registered_call(grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask, grpc_completion_queue *completion_queue, void *registered_call_handle, gpr_timespec deadline, void *reserved)
Create a call given a handle returned from grpc_channel_register_call.
GRPCAPI void grpc_resource_quota_ref(grpc_resource_quota *resource_quota)
Add a reference to a buffer pool.
GRPCAPI void grpc_server_destroy(grpc_server *server)
Destroy a server.
GRPCAPI grpc_call * grpc_channel_create_call(grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask, grpc_completion_queue *completion_queue, grpc_slice method, const grpc_slice *host, gpr_timespec deadline, void *reserved)
Create a call given a grpc_channel, in order to call 'method'.
GRPCAPI void grpc_metadata_array_init(grpc_metadata_array *array)
GRPCAPI struct census_context * grpc_census_call_get_context(grpc_call *call)
Retrieve the calls current census context.
GRPCAPI void grpc_completion_queue_destroy(grpc_completion_queue *cq)
Destroy a completion queue.
GRPCAPI grpc_resource_quota * grpc_resource_quota_create(const char *trace_name)
Create a buffer pool.
GRPCAPI void grpc_channel_destroy(grpc_channel *channel)
Close and destroy a grpc channel.
Operation data: one field for each op type (except SEND_CLOSE_FROM_CLIENT which has no arguments) ...
Definition: grpc_types.h:488
GRPCAPI int grpc_server_add_insecure_http2_port(grpc_server *server, const char *addr)
Add a HTTP2 over plaintext over tcp listener.
GRPCAPI const grpc_completion_queue_factory * grpc_completion_queue_factory_lookup(const grpc_completion_queue_attributes *attributes)
Returns the completion queue factory based on the attributes.
GRPCAPI void grpc_completion_queue_shutdown(grpc_completion_queue *cq)
Begin destruction of a completion queue.
struct grpc_alarm grpc_alarm
An alarm associated with a completion queue.
Definition: grpc_types.h:75
GRPCAPI void grpc_init(void)
Initialize the grpc library.
GRPCAPI grpc_alarm * grpc_alarm_create(grpc_completion_queue *cq, gpr_timespec deadline, void *tag)
Create a completion queue alarm instance associated to cq.
#define GRPCAPI
Definition: port_platform.h:420
GRPCAPI void grpc_metadata_array_destroy(grpc_metadata_array *array)
GRPCAPI grpc_channel * grpc_insecure_channel_create(const char *target, const grpc_channel_args *args, void *reserved)
Create a client channel to 'target'.
GRPCAPI grpc_call_error grpc_call_start_batch(grpc_call *call, const grpc_op *ops, size_t nops, void *tag, void *reserved)
Start a batch of operations defined in the array ops; when complete, post a completion of type 'tag' ...
GRPCAPI void grpc_shutdown(void)
Shut down the grpc library.
GRPCAPI void grpc_call_ref(grpc_call *call)
Ref a call.
GRPCAPI void grpc_channel_watch_connectivity_state(grpc_channel *channel, grpc_connectivity_state last_observed_state, gpr_timespec deadline, grpc_completion_queue *cq, void *tag)
Watch for a change in connectivity state.
GRPCAPI void * grpc_channel_register_call(grpc_channel *channel, const char *method, const char *host, void *reserved)
Pre-register a method/host pair on a channel.
GRPCAPI void * grpc_call_arena_alloc(grpc_call *call, size_t size)
Allocate memory in the grpc_call arena: this memory is automatically discarded at call completion...
GRPCAPI grpc_server * grpc_server_create(const grpc_channel_args *args, void *reserved)
Create a server.
GRPCAPI int grpc_header_nonbin_value_is_legal(grpc_slice slice)
Check whether a non-binary metadata value is legal (will be accepted by core)
Information requested from the channel.
Definition: grpc_types.h:555
GRPCAPI void grpc_call_unref(grpc_call *call)
Unref a call.
GRPCAPI int grpc_header_key_is_legal(grpc_slice slice)
Check whether a metadata key is legal (will be accepted by core)
struct grpc_resource_quota grpc_resource_quota
Definition: grpc_types.h:564
Analogous to struct timespec.
Definition: gpr_types.h:62
GRPCAPI grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cq, void *tag, gpr_timespec deadline, void *reserved)
Blocks until an event with tag 'tag' is available, the completion queue is being shutdown or deadline...
GRPCAPI void grpc_census_call_set_context(grpc_call *call, struct census_context *context)
Set census context for a call; Must be called before first call to grpc_call_start_batch().
GRPCAPI grpc_completion_queue * grpc_completion_queue_create_for_pluck(void *reserved)
Helper function to create a completion queue with grpc_cq_completion_type of GRPC_CQ_PLUCK and grpc_c...
GRPCAPI grpc_call_error grpc_server_request_registered_call(grpc_server *server, void *registered_method, grpc_call **call, gpr_timespec *deadline, grpc_metadata_array *request_metadata, grpc_byte_buffer **optional_payload, grpc_completion_queue *cq_bound_to_call, grpc_completion_queue *cq_for_notification, void *tag_new)
Request notification of a new pre-registered call.
struct grpc_completion_queue grpc_completion_queue
Completion Queues enable notification of the completion of asynchronous actions.
Definition: grpc_types.h:72
grpc_status_code
Definition: status.h:41
GRPCAPI int grpc_tracer_set_enabled(const char *name, int enabled)
Enable or disable a tracer.
GRPCAPI void grpc_register_plugin(void(*init)(void), void(*destroy)(void))
Registers a plugin to be initialized and destroyed with the library.
GRPCAPI void grpc_resource_quota_resize(grpc_resource_quota *resource_quota, size_t new_size)
Update the size of a buffer pool.
GRPCAPI const char * grpc_call_error_to_string(grpc_call_error error)
Convert grpc_call_error values to a string.
struct census_context census_context
A Census Context is a handle used by Census to represent the current tracing and stats collection inf...
Definition: census.h:83