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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 #include <grpc/support/port_platform.h>
20 
21 #include "src/core/lib/iomgr/socket_mutator.h"
22 
23 #include <grpc/impl/codegen/grpc_types.h>
24 #include <grpc/support/sync.h>
25 
26 #include "src/core/lib/channel/channel_args.h"
27 #include "src/core/lib/gpr/useful.h"
28 
grpc_socket_mutator_init(grpc_socket_mutator * mutator,const grpc_socket_mutator_vtable * vtable)29 void grpc_socket_mutator_init(grpc_socket_mutator* mutator,
30                               const grpc_socket_mutator_vtable* vtable) {
31   mutator->vtable = vtable;
32   gpr_ref_init(&mutator->refcount, 1);
33 }
34 
grpc_socket_mutator_ref(grpc_socket_mutator * mutator)35 grpc_socket_mutator* grpc_socket_mutator_ref(grpc_socket_mutator* mutator) {
36   gpr_ref(&mutator->refcount);
37   return mutator;
38 }
39 
grpc_socket_mutator_mutate_fd(grpc_socket_mutator * mutator,int fd)40 bool grpc_socket_mutator_mutate_fd(grpc_socket_mutator* mutator, int fd) {
41   return mutator->vtable->mutate_fd(fd, mutator);
42 }
43 
grpc_socket_mutator_compare(grpc_socket_mutator * a,grpc_socket_mutator * b)44 int grpc_socket_mutator_compare(grpc_socket_mutator* a,
45                                 grpc_socket_mutator* b) {
46   int c = GPR_ICMP(a, b);
47   if (c != 0) {
48     grpc_socket_mutator* sma = a;
49     grpc_socket_mutator* smb = b;
50     c = GPR_ICMP(sma->vtable, smb->vtable);
51     if (c == 0) {
52       c = sma->vtable->compare(sma, smb);
53     }
54   }
55   return c;
56 }
57 
grpc_socket_mutator_unref(grpc_socket_mutator * mutator)58 void grpc_socket_mutator_unref(grpc_socket_mutator* mutator) {
59   if (gpr_unref(&mutator->refcount)) {
60     mutator->vtable->destroy(mutator);
61   }
62 }
63 
socket_mutator_arg_copy(void * p)64 static void* socket_mutator_arg_copy(void* p) {
65   return grpc_socket_mutator_ref(static_cast<grpc_socket_mutator*>(p));
66 }
67 
socket_mutator_arg_destroy(void * p)68 static void socket_mutator_arg_destroy(void* p) {
69   grpc_socket_mutator_unref(static_cast<grpc_socket_mutator*>(p));
70 }
71 
socket_mutator_cmp(void * a,void * b)72 static int socket_mutator_cmp(void* a, void* b) {
73   return grpc_socket_mutator_compare(static_cast<grpc_socket_mutator*>(a),
74                                      static_cast<grpc_socket_mutator*>(b));
75 }
76 
77 static const grpc_arg_pointer_vtable socket_mutator_arg_vtable = {
78     socket_mutator_arg_copy, socket_mutator_arg_destroy, socket_mutator_cmp};
79 
grpc_socket_mutator_to_arg(grpc_socket_mutator * mutator)80 grpc_arg grpc_socket_mutator_to_arg(grpc_socket_mutator* mutator) {
81   return grpc_channel_arg_pointer_create((char*)GRPC_ARG_SOCKET_MUTATOR,
82                                          mutator, &socket_mutator_arg_vtable);
83 }
84