1 /* 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 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 */ 15 16 #ifndef BASE_EVENTHANDLER_FRAMEWORKS_EVENTHANDLER_INCLUDE_NONE_IO_WAITER_H 17 #define BASE_EVENTHANDLER_FRAMEWORKS_EVENTHANDLER_INCLUDE_NONE_IO_WAITER_H 18 19 #include <condition_variable> 20 #include <mutex> 21 22 #include "io_waiter.h" 23 #include "nocopyable.h" 24 25 namespace OHOS { 26 namespace AppExecFwk { 27 // Io waiter which does not support listening file descriptor. 28 class NoneIoWaiter final : public IoWaiter { 29 public: 30 NoneIoWaiter() = default; 31 ~NoneIoWaiter() final; 32 DISALLOW_COPY_AND_MOVE(NoneIoWaiter); 33 34 bool WaitFor(std::unique_lock<std::mutex> &lock, int64_t nanoseconds) final; 35 36 void NotifyOne() final; 37 void NotifyAll() final; 38 39 bool SupportListeningFileDescriptor() const final; 40 41 bool AddFileDescriptor(int32_t fileDescriptor, uint32_t events) final; 42 void RemoveFileDescriptor(int32_t fileDescriptor) final; 43 44 void SetFileDescriptorEventCallback(const FileDescriptorEventCallback &callback) final; 45 46 private: 47 std::condition_variable condition_; 48 uint32_t waitingCount_ {0}; 49 bool pred_ {false}; 50 }; 51 } // namespace AppExecFwk 52 } // namespace OHOS 53 54 #endif // #ifndef BASE_EVENTHANDLER_FRAMEWORKS_EVENTHANDLER_INCLUDE_NONE_IO_WAITER_H 55