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

#include "error_list.h"


/**
 * @class Mutex 
 * @author Juan Linietsky
 * Portable Mutex (thread-safe locking) implementation.
 * Mutexes are always recursive ( they don't self-lock in a single thread ).
 * Mutexes can be used with a Lockp object like this, to avoid having to worry about unlocking:
 * Lockp( mutex );
 */


class Mutex {
protected:	
	static Mutex* (*create_func)(bool);
	
public:

	virtual void lock()=0; ///< Lock the mutex, block if locked by someone else
	virtual void unlock()=0; ///< Unlock the mutex, let other threads continue
	virtual Error try_lock()=0; ///< Attempt to lock the mutex, true on success, false means it can't lock.

	static Mutex * create(bool p_recursive=true); ///< Create a mutex
	
	virtual ~Mutex();
};

class MutexLock {

	Mutex *mutex;
public:

	MutexLock(Mutex* p_mutex) { mutex=p_mutex; if (mutex) mutex->lock(); }
	~MutexLock() { if (mutex) mutex->unlock(); }

};

#endif
