1 /* 2 * Copyright (c) 2025 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 COMMON_COMPONENTS_BASE_ATOMIC_SPINLOCK_H 17 #define COMMON_COMPONENTS_BASE_ATOMIC_SPINLOCK_H 18 19 #include <atomic> 20 21 #include "common_interfaces/base/common.h" 22 23 namespace common { 24 class AtomicSpinLock { 25 public: AtomicSpinLock()26 AtomicSpinLock() {} 27 ~AtomicSpinLock() = default; 28 Lock()29 void Lock() 30 { 31 while (state_.test_and_set(std::memory_order_acquire)) {} 32 } 33 Unlock()34 void Unlock() { state_.clear(std::memory_order_release); } 35 TryLock()36 bool TryLock() { return (state_.test_and_set(std::memory_order_acquire) == false); } 37 38 private: 39 std::atomic_flag state_ = ATOMIC_FLAG_INIT; 40 41 NO_COPY_SEMANTIC_CC(AtomicSpinLock); 42 }; 43 } // namespace common 44 45 #endif // COMMON_COMPONENTS_BASE_ATOMIC_SPINLOCK_H 46