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// Copyright (C) 2014 The Android Open Source Project
//
// 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 EMUGL_MUTEX_H
#define EMUGL_MUTEX_H
#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN 1
# include <windows.h>
#else
# include <pthread.h>
#endif
namespace emugl {
// Simple wrapper class for mutexes.
class Mutex {
public:
// Constructor.
Mutex() {
#ifdef _WIN32
::InitializeCriticalSection(&mLock);
#else
::pthread_mutex_init(&mLock, NULL);
#endif
}
// Destructor.
~Mutex() {
#ifdef _WIN32
::DeleteCriticalSection(&mLock);
#else
::pthread_mutex_destroy(&mLock);
#endif
}
// Acquire the mutex.
void lock() {
#ifdef _WIN32
::EnterCriticalSection(&mLock);
#else
::pthread_mutex_lock(&mLock);
#endif
}
// Release the mutex.
void unlock() {
#ifdef _WIN32
::LeaveCriticalSection(&mLock);
#else
::pthread_mutex_unlock(&mLock);
#endif
}
// Helper class to lock / unlock a mutex automatically on scope
// entry and exit.
class AutoLock {
public:
AutoLock(Mutex& mutex) : mMutex(&mutex) {
mMutex->lock();
}
~AutoLock() {
mMutex->unlock();
}
private:
Mutex* mMutex;
};
private:
#ifdef _WIN32
CRITICAL_SECTION mLock;
#else
pthread_mutex_t mLock;
#endif
};
} // namespace emugl
#endif // EMUGL_MUTEX_H
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