1 /*
2 *
3 * Copyright 2016 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 "absl/container/inlined_vector.h"
22
23 #include "src/core/lib/channel/handshaker_registry.h"
24 #include "src/core/lib/gpr/alloc.h"
25 #include "src/core/lib/gprpp/memory.h"
26
27 #include <string.h>
28 #include <algorithm>
29
30 #include <grpc/support/alloc.h>
31
32 //
33 // grpc_handshaker_factory_list
34 //
35
36 namespace grpc_core {
37
38 namespace {
39
40 class HandshakerFactoryList {
41 public:
42 void Register(bool at_start, std::unique_ptr<HandshakerFactory> factory);
43 void AddHandshakers(const grpc_channel_args* args,
44 grpc_pollset_set* interested_parties,
45 HandshakeManager* handshake_mgr);
46
47 private:
48 absl::InlinedVector<std::unique_ptr<HandshakerFactory>, 2> factories_;
49 };
50
51 HandshakerFactoryList* g_handshaker_factory_lists = nullptr;
52
53 } // namespace
54
Register(bool at_start,std::unique_ptr<HandshakerFactory> factory)55 void HandshakerFactoryList::Register(
56 bool at_start, std::unique_ptr<HandshakerFactory> factory) {
57 factories_.push_back(std::move(factory));
58 if (at_start) {
59 auto* end = &factories_[factories_.size() - 1];
60 std::rotate(&factories_[0], end, end + 1);
61 }
62 }
63
AddHandshakers(const grpc_channel_args * args,grpc_pollset_set * interested_parties,HandshakeManager * handshake_mgr)64 void HandshakerFactoryList::AddHandshakers(const grpc_channel_args* args,
65 grpc_pollset_set* interested_parties,
66 HandshakeManager* handshake_mgr) {
67 for (size_t idx = 0; idx < factories_.size(); ++idx) {
68 auto& handshaker_factory = factories_[idx];
69 handshaker_factory->AddHandshakers(args, interested_parties, handshake_mgr);
70 }
71 }
72
73 //
74 // plugin
75 //
76
Init()77 void HandshakerRegistry::Init() {
78 GPR_ASSERT(g_handshaker_factory_lists == nullptr);
79 g_handshaker_factory_lists = new HandshakerFactoryList[NUM_HANDSHAKER_TYPES];
80 }
81
Shutdown()82 void HandshakerRegistry::Shutdown() {
83 GPR_ASSERT(g_handshaker_factory_lists != nullptr);
84 delete[] g_handshaker_factory_lists;
85 g_handshaker_factory_lists = nullptr;
86 }
87
RegisterHandshakerFactory(bool at_start,HandshakerType handshaker_type,std::unique_ptr<HandshakerFactory> factory)88 void HandshakerRegistry::RegisterHandshakerFactory(
89 bool at_start, HandshakerType handshaker_type,
90 std::unique_ptr<HandshakerFactory> factory) {
91 GPR_ASSERT(g_handshaker_factory_lists != nullptr);
92 auto& factory_list = g_handshaker_factory_lists[handshaker_type];
93 factory_list.Register(at_start, std::move(factory));
94 }
95
AddHandshakers(HandshakerType handshaker_type,const grpc_channel_args * args,grpc_pollset_set * interested_parties,HandshakeManager * handshake_mgr)96 void HandshakerRegistry::AddHandshakers(HandshakerType handshaker_type,
97 const grpc_channel_args* args,
98 grpc_pollset_set* interested_parties,
99 HandshakeManager* handshake_mgr) {
100 GPR_ASSERT(g_handshaker_factory_lists != nullptr);
101 auto& factory_list = g_handshaker_factory_lists[handshaker_type];
102 factory_list.AddHandshakers(args, interested_parties, handshake_mgr);
103 }
104
105 } // namespace grpc_core
106