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// 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