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#ifndef _ASURA_MUTEX_H_
#define _ASURA_MUTEX_H_

#include <asura-base/Type.h>
#include <asura-base/Classes.h>

#include "../UtilsConfig.h"

#if ASURA_THREAD_WIN32
#include <windows.h>
#endif

namespace_begin(AsuraEngine)
namespace_begin(Threads)

#define ASURA_MUTEX_MAXWAIT (~(uint32)0)

class MutexImpl;

class Mutex
{
public:

	Mutex();
	~Mutex();

	void Lock();
	void Unlock();

private:

	// ֹ
	Mutex(const Mutex&);
	Mutex& operator=(const Mutex&);

	MutexImpl* m_Impl;

};

class _mutex_locker
{
public:
	_mutex_locker(Mutex& mutex)
		: m(mutex)
	{
		m.Lock();
	};
	~_mutex_locker()
	{
		m.Unlock();
	}
	operator bool() { return false; };
private: 
	void* operator new(size_t);
	Mutex& m;
};

#define lock(m) \
if(_mutex_locker _asura_mutex_locker = m){} else

ASURA_ABSTRACT class MutexImpl
{
public:

	MutexImpl() {};
	virtual ~MutexImpl() {};

	virtual void Lock() = 0; 
	virtual void Unlock() = 0;

};

#if ASURA_MUTEX_WIN32_CRITICLE_SECTION

//https://blog.csdn.net/l799623787/article/details/18259949
class MutexImplWin32_CS ASURA_FINAL : public MutexImpl
{
public:

	MutexImplWin32_CS();
	~MutexImplWin32_CS();

	void Lock() override;
	void Unlock() override;

private:

	//HANDLE m_Handle;
	CRITICAL_SECTION m_Mutex;

};

#endif // ASURA_MUTEX_WIN32_CRITICLE_SECTION

#if ASURA_MUTEX_WIN32_KERNAL_MUTEX

class MutexImplWin32_KM ASURA_FINAL : public MutexImpl
{
public:

	MutexImplWin32_KM();
	~MutexImplWin32_KM();

	void Lock() override;
	void Unlock() override;

private:

	HANDLE m_Handle;

};

#endif // ASURA_MUTEX_WIN32_KERNAL_MUTEX

#if ASURA_THREAD_STD 

class MutexImplSTD ASURA_FINAL : public MutexImpl
{
};

#endif // ASURA_THREAD_STD 

namespace_end
namespace_end

namespace AEThreading = AsuraEngine::Threads;

#endif