godot/core/os/mutex.h

/**************************************************************************/
/*  mutex.h                                                               */
/**************************************************************************/
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#ifndef MUTEX_H
#define MUTEX_H

#include "core/error/error_macros.h"
#include "core/typedefs.h"

#ifdef MINGW_ENABLED
#define MINGW_STDTHREAD_REDUNDANCY_WARNING
#include "thirdparty/mingw-std-threads/mingw.mutex.h"
#define THREADING_NAMESPACE …
#else
#include <mutex>
#define THREADING_NAMESPACE …
#endif

#ifdef THREADS_ENABLED

template <typename MutexT>
class MutexLock;

template <typename StdMutexT>
class MutexImpl { … };

template <typename MutexT>
class MutexLock { … };

Mutex; // Recursive, for general use
BinaryMutex; // Non-recursive, handle with care

extern template class MutexImpl<THREADING_NAMESPACE::recursive_mutex>;
extern template class MutexImpl<THREADING_NAMESPACE::mutex>;
extern template class MutexLock<MutexImpl<THREADING_NAMESPACE::recursive_mutex>>;
extern template class MutexLock<MutexImpl<THREADING_NAMESPACE::mutex>>;

#else // No threads.

class MutexImpl {
	mutable THREADING_NAMESPACE::mutex mutex;

public:
	void lock() const {}
	void unlock() const {}
	bool try_lock() const { return true; }
};

template <typename MutexT>
class MutexLock {
public:
	MutexLock(const MutexT &p_mutex) {}

	void temp_relock() const {}
	void temp_unlock() const {}
};

using Mutex = MutexImpl;
using BinaryMutex = MutexImpl;

#endif // THREADS_ENABLED

#endif // MUTEX_H