1 /*
2  *
3  * Copyright 2015 gRPC authors.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  */
18 
19 #ifndef GRPC_CORE_LIB_TRANSPORT_TRANSPORT_IMPL_H
20 #define GRPC_CORE_LIB_TRANSPORT_TRANSPORT_IMPL_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #include "src/core/lib/transport/transport.h"
25 
26 typedef struct grpc_transport_vtable {
27   /* Memory required for a single stream element - this is allocated by upper
28      layers and initialized by the transport */
29   size_t sizeof_stream; /* = sizeof(transport stream) */
30 
31   /* name of this transport implementation */
32   const char* name;
33 
34   /* implementation of grpc_transport_init_stream */
35   int (*init_stream)(grpc_transport* self, grpc_stream* stream,
36                      grpc_stream_refcount* refcount, const void* server_data,
37                      gpr_arena* arena);
38 
39   /* implementation of grpc_transport_set_pollset */
40   void (*set_pollset)(grpc_transport* self, grpc_stream* stream,
41                       grpc_pollset* pollset);
42 
43   /* implementation of grpc_transport_set_pollset */
44   void (*set_pollset_set)(grpc_transport* self, grpc_stream* stream,
45                           grpc_pollset_set* pollset_set);
46 
47   /* implementation of grpc_transport_perform_stream_op */
48   void (*perform_stream_op)(grpc_transport* self, grpc_stream* stream,
49                             grpc_transport_stream_op_batch* op);
50 
51   /* implementation of grpc_transport_perform_op */
52   void (*perform_op)(grpc_transport* self, grpc_transport_op* op);
53 
54   /* implementation of grpc_transport_destroy_stream */
55   void (*destroy_stream)(grpc_transport* self, grpc_stream* stream,
56                          grpc_closure* then_schedule_closure);
57 
58   /* implementation of grpc_transport_destroy */
59   void (*destroy)(grpc_transport* self);
60 
61   /* implementation of grpc_transport_get_endpoint */
62   grpc_endpoint* (*get_endpoint)(grpc_transport* self);
63 } grpc_transport_vtable;
64 
65 /* an instance of a grpc transport */
66 struct grpc_transport {
67   /* pointer to a vtable defining operations on this transport */
68   const grpc_transport_vtable* vtable;
69 };
70 
71 #endif /* GRPC_CORE_LIB_TRANSPORT_TRANSPORT_IMPL_H */
72