/**
 * \file mutex.cpp
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Peter Kümmel
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "mutex.h"

#include <QMutex>


namespace lyx {


struct Mutex::Private
{
	// QMutex::Recursive: less risks for dead-locks
	Private() : qmutex_(QMutex::Recursive)
	{
	}

	QMutex qmutex_;
};


Mutex::Mutex() : d(new Private)
{
}


Mutex::~Mutex()
{
	delete d;
}


// It makes no sense to copy the mutex,
// each instance has its own QMutex,
// therefore nothing to copy!
// TODO review
Mutex::Mutex(const Mutex&) : d(new Private)
{
}


Mutex& Mutex::operator=(const Mutex&)
{
	return *this;
}



Mutex::Locker::Locker(Mutex* mtx) : mutex_(mtx)
{
	mutex_->d->qmutex_.lock();
}


Mutex::Locker::~Locker()
{
	mutex_->d->qmutex_.unlock();
}



} // namespace lyx