| // Copyright 2019 The SwiftShader Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef sw_RecursiveLock_hpp |
| #define sw_RecursiveLock_hpp |
| |
| #include "Thread.hpp" |
| |
| #include <mutex> |
| |
| namespace sw |
| { |
| class RecursiveLock |
| { |
| public: |
| RecursiveLock() |
| { |
| } |
| |
| bool attemptLock() |
| { |
| return mutex.try_lock(); |
| } |
| |
| void lock() |
| { |
| mutex.lock(); |
| } |
| |
| void unlock() |
| { |
| mutex.unlock(); |
| } |
| private: |
| std::recursive_mutex mutex; |
| }; |
| } |
| |
| class RecursiveLockGuard |
| { |
| public: |
| explicit RecursiveLockGuard(sw::RecursiveLock &mutex) : mutex(&mutex) |
| { |
| mutex.lock(); |
| } |
| |
| explicit RecursiveLockGuard(sw::RecursiveLock *mutex) : mutex(mutex) |
| { |
| if (mutex) mutex->lock(); |
| } |
| |
| ~RecursiveLockGuard() |
| { |
| if (mutex) mutex->unlock(); |
| } |
| |
| protected: |
| sw::RecursiveLock *mutex; |
| }; |
| |
| #endif // sw_RecursiveLock_hpp |