1 // Copyright 2022 The gRPC Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 #ifndef GRPC_SRC_CORE_LIB_EVENT_ENGINE_WINDOWS_IOCP_H 15 #define GRPC_SRC_CORE_LIB_EVENT_ENGINE_WINDOWS_IOCP_H 16 17 #include <grpc/support/port_platform.h> 18 19 #ifdef GPR_WINDOWS 20 21 #include <grpc/event_engine/event_engine.h> 22 23 #include "absl/status/status.h" 24 #include "src/core/lib/event_engine/poller.h" 25 #include "src/core/lib/event_engine/thread_pool/thread_pool.h" 26 #include "src/core/lib/event_engine/windows/win_socket.h" 27 28 namespace grpc_event_engine { 29 namespace experimental { 30 31 class IOCP final : public Poller { 32 public: 33 explicit IOCP(ThreadPool* thread_pool) noexcept; 34 ~IOCP() override; 35 // Not copyable 36 IOCP(const IOCP&) = delete; 37 IOCP& operator=(const IOCP&) = delete; 38 // Not moveable 39 IOCP(IOCP&& other) = delete; 40 IOCP& operator=(IOCP&& other) = delete; 41 42 // interface methods 43 void Shutdown(); 44 WorkResult Work(EventEngine::Duration timeout, 45 absl::FunctionRef<void()> schedule_poll_again) override; 46 void Kick() override; 47 48 std::unique_ptr<WinSocket> Watch(SOCKET socket); 49 // Return the set of default flags 50 static DWORD GetDefaultSocketFlags(); 51 52 private: 53 // Initialize default flags via checking platform support 54 static DWORD WSASocketFlagsInit(); 55 56 ThreadPool* thread_pool_; 57 HANDLE iocp_handle_; 58 OVERLAPPED kick_overlap_; 59 ULONG kick_token_; 60 std::atomic<int> outstanding_kicks_{0}; 61 }; 62 63 } // namespace experimental 64 } // namespace grpc_event_engine 65 66 #endif 67 68 #endif // GRPC_SRC_CORE_LIB_EVENT_ENGINE_WINDOWS_IOCP_H 69