1 /** 2 * Copyright 2021 Huawei Technologies Co., Ltd 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef MINDSPORE_CORE_MINDRT_INCLUDE_ASYNC_SPINLOCK_H 18 #define MINDSPORE_CORE_MINDRT_INCLUDE_ASYNC_SPINLOCK_H 19 20 #include <atomic> 21 22 namespace mindspore { 23 24 class SpinLock { 25 public: Lock()26 void Lock() { 27 while (locked.test_and_set(std::memory_order_acquire)) { 28 } 29 } 30 Unlock()31 void Unlock() { locked.clear(std::memory_order_release); } 32 33 private: 34 std::atomic_flag locked = ATOMIC_FLAG_INIT; 35 }; 36 37 } // namespace mindspore 38 39 #endif 40