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/*
* Copyright 2020 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef RTC_BASE_SYNCHRONIZATION_MUTEX_PTHREAD_H_
#define RTC_BASE_SYNCHRONIZATION_MUTEX_PTHREAD_H_
#if defined(WEBRTC_POSIX)
#include <pthread.h>
#if defined(WEBRTC_MAC)
#include <pthread_spis.h>
#endif
#include "rtc_base/thread_annotations.h"
namespace webrtc {
class RTC_LOCKABLE MutexImpl final {
public:
MutexImpl() {
pthread_mutexattr_t mutex_attribute;
pthread_mutexattr_init(&mutex_attribute);
#if defined(WEBRTC_MAC)
pthread_mutexattr_setpolicy_np(&mutex_attribute,
_PTHREAD_MUTEX_POLICY_FIRSTFIT);
#endif
pthread_mutex_init(&mutex_, &mutex_attribute);
pthread_mutexattr_destroy(&mutex_attribute);
}
MutexImpl(const MutexImpl&) = delete;
MutexImpl& operator=(const MutexImpl&) = delete;
~MutexImpl() { pthread_mutex_destroy(&mutex_); }
void Lock() RTC_EXCLUSIVE_LOCK_FUNCTION() { pthread_mutex_lock(&mutex_); }
RTC_WARN_UNUSED_RESULT bool TryLock() RTC_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
return pthread_mutex_trylock(&mutex_) == 0;
}
void Unlock() RTC_UNLOCK_FUNCTION() { pthread_mutex_unlock(&mutex_); }
private:
pthread_mutex_t mutex_;
};
} // namespace webrtc
#endif // #if defined(WEBRTC_POSIX)
#endif // RTC_BASE_SYNCHRONIZATION_MUTEX_PTHREAD_H_
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