/***************************************************************************
 *   Copyright (C) 2005 by Jeff Ferr                                       *
 *   root@sat                                                              *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include "jcondition.h"
#include "jthreadexception.h"

#include <errno.h>

namespace jthread {

Condition::Condition(int nblock)
{
	if (pthread_cond_init(&_condition, NULL) != 0) { //&cond) != 0) {
		throw ThreadException("Init condition error !");
	}

	_count = 0;
	_nblock = nblock;
}

Condition::~Condition()
{
	/*
	while (pthread_cond_destroy(&_condition) == EBUSY) {
		NotifyAll();
	}
	*/

	pthread_cond_destroy(&_condition);
}

void Condition::Wait()
{
	_monitor.Lock();

	if (_count == 0) {
		if (pthread_cond_wait(&_condition, &_monitor._mutex) != 0) {
			throw ThreadException("Condition wait error !");
		}
	}

	_count--;

	_monitor.Unlock();
}

void Condition::Wait(struct timespec time_)
{
	_monitor.Lock();

	if (_count == 0) {
		if (pthread_cond_timedwait(&_condition, &_monitor._mutex, &time_) != 0) {
			throw ThreadException("Condition wait error !");
		}
	}

	_count--;

	_monitor.Unlock();
}

void Condition::Notify()
{
	_monitor.Lock();

	_count += _nblock;

	if (_count == _nblock) {
		if (pthread_cond_signal(&_condition) != 0) {
			throw ThreadException("Condition notify error !");
		}
	}

	_monitor.Unlock();
}

void Condition::NotifyAll()
{
	_monitor.Lock();

	_count += _nblock;
	
	if (_count == _nblock) {
		if (pthread_cond_broadcast(&_condition) != 0) {
			throw ThreadException("Condition notify all error !");
		}
	}

	_monitor.Unlock();
}

};