/*! \file pimutex.h
 * \brief Mutex
*/
/*
	PIP - Platform Independent Primitives
	Mutex
	Ivan Pelipenko peri4ko@yandex.ru, Andrey Bychkov work.a.b@yandex.ru

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PIMUTEX_H
#define PIMUTEX_H

#include "piinit.h"


//class PIP_EXPORT PIMutex
//{
//public:
//	//! Constructs unlocked mutex
//	explicit PIMutex();
	
//	//! Destroy mutex
//	~PIMutex();


//	//! \brief Lock mutex
//	//! \details If mutex is unlocked it set to locked state and returns immediate.
//	//! If mutex is already locked function blocks until mutex will be unlocked
//	void lock();
	
//	//! \brief Unlock mutex
//	//! \details In any case this function returns immediate
//	void unlock();
	
//	//! \brief Try to lock mutex
//	//! \details If mutex is unlocked it set to locked state and returns "true" immediate.
//	//! If mutex is already locked function returns immediate an returns "false"
//	bool tryLock();
	
//	//! Returns if mutex is locked
//	bool isLocked() const;
	
//private:
//	NO_COPY_CLASS(PIMutex)

//	void init();
//	void destroy();
//	bool inited_;
//	PRIVATE_DECLARATION
//};


class PIP_EXPORT PIMutexLocker
{
public:
	PIMutexLocker(PIMutex * m, bool condition = true): mutex(m), cond(condition) {if (cond) mutex->lock();}
	PIMutexLocker(PIMutex & m, bool condition = true): mutex(&m), cond(condition) {if (cond) mutex->lock();}
	~PIMutexLocker() {if (cond) mutex->unlock();}
private:
	PIMutex * mutex;
	std::atomic_bool cond;
};

#endif // PIMUTEX_H