1 /* 2 * Copyright (c) 2021 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 #include "local_semaphore.h" 17 18 #include <cerrno> 19 #include <cstdint> 20 21 namespace OHOS { LocalSemaphore(int count)22LocalSemaphore::LocalSemaphore(int count) 23 { 24 sem_init(&sem, false, static_cast<unsigned int>(count)); 25 } 26 ~LocalSemaphore()27LocalSemaphore::~LocalSemaphore() 28 { 29 sem_destroy(&sem); 30 } 31 Inc()32void LocalSemaphore::Inc() 33 { 34 sem_post(&sem); 35 } 36 Dec()37void LocalSemaphore::Dec() 38 { 39 int32_t ret = 0; 40 do { 41 ret = sem_wait(&sem); 42 } while (ret == -1 && errno == EINTR); 43 } 44 } // namespace OHOS 45