93 lines
2.1 KiB
C++
93 lines
2.1 KiB
C++
// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
|
|
|
|
#pragma once
|
|
|
|
#if PLATFORM_UNIX
|
|
|
|
#include "Engine/Platform/Platform.h"
|
|
#include <pthread.h>
|
|
|
|
class UnixConditionVariable;
|
|
|
|
/// <summary>
|
|
/// Unix implementation of a critical section.
|
|
/// </summary>
|
|
class FLAXENGINE_API UnixCriticalSection
|
|
{
|
|
friend UnixConditionVariable;
|
|
|
|
private:
|
|
|
|
pthread_mutex_t _mutex;
|
|
pthread_mutex_t* _mutexPtr;
|
|
#if BUILD_DEBUG
|
|
pthread_t _owningThreadId;
|
|
#endif
|
|
|
|
private:
|
|
|
|
UnixCriticalSection(const UnixCriticalSection&);
|
|
UnixCriticalSection& operator=(const UnixCriticalSection&);
|
|
|
|
public:
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="UnixCriticalSection"/> class.
|
|
/// </summary>
|
|
UnixCriticalSection()
|
|
{
|
|
pthread_mutexattr_t attributes;
|
|
pthread_mutexattr_init(&attributes);
|
|
pthread_mutexattr_settype(&attributes, PTHREAD_MUTEX_RECURSIVE);
|
|
pthread_mutex_init(&_mutex, &attributes);
|
|
pthread_mutexattr_destroy(&attributes);
|
|
_mutexPtr = &_mutex;
|
|
#if BUILD_DEBUG
|
|
_owningThreadId = 0;
|
|
#endif
|
|
}
|
|
|
|
/// <summary>
|
|
/// Finalizes an instance of the <see cref="UnixCriticalSection"/> class.
|
|
/// </summary>
|
|
~UnixCriticalSection()
|
|
{
|
|
pthread_mutex_destroy(&_mutex);
|
|
}
|
|
|
|
public:
|
|
|
|
/// <summary>
|
|
/// Locks the critical section.
|
|
/// </summary>
|
|
void Lock() const
|
|
{
|
|
pthread_mutex_lock(_mutexPtr);
|
|
#if BUILD_DEBUG
|
|
((UnixCriticalSection*)this)->_owningThreadId = pthread_self();
|
|
#endif
|
|
}
|
|
|
|
/// <summary>
|
|
/// Attempts to enter a critical section without blocking. If the call is successful, the calling thread takes ownership of the critical section.
|
|
/// </summary>
|
|
/// <returns>True if calling thread took ownership of the critical section.</returns>
|
|
bool TryLock() const
|
|
{
|
|
return pthread_mutex_trylock(_mutexPtr) == 0;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Releases the lock on the critical section.
|
|
/// </summary>
|
|
void Unlock() const
|
|
{
|
|
#if BUILD_DEBUG
|
|
((UnixCriticalSection*)this)->_owningThreadId = 0;
|
|
#endif
|
|
pthread_mutex_unlock(_mutexPtr);
|
|
}
|
|
};
|
|
|
|
#endif
|