/***************************************************************************
                          SIMPLY POWERFUL TOOLKIT (SPTK)
                          CWaiter.cpp  -  description
                             -------------------
    begin                : Fri Jul 20 2001
    copyright            : (C) 2001-2006 by Alexey Parshin
    email                : alexeyp@gmail.com
 ***************************************************************************/

/***************************************************************************
   This library is free software; you can redistribute it and/or modify it 
   under the terms of the GNU Library General Public License as published by
   the Free Software Foundation; either version 2 of the License, or (at 
   your option) any later version.

   This library 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 Library
   General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; if not, write to the Free Software Foundation, 
   Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

   Please report all bugs and problems to "alexeyp@gmail.com"
 ***************************************************************************/

#include <sptk3/CWaiter.h>

using namespace sptk;

CWaiter::CWaiter() {
#ifndef _WIN32
	pthread_mutex_init(&m_waiter,NULL);
	pthread_cond_init(&m_condition,NULL);
#else
	m_waiter = CreateEvent(NULL, FALSE, TRUE, NULL);
#endif
}

CWaiter::~CWaiter() {
#ifndef _WIN32
	pthread_mutex_destroy(&m_waiter);
#else
	CloseHandle(m_waiter);
#endif
}

void CWaiter::lock() {
#ifndef _WIN32
	pthread_mutex_lock(&m_waiter);
#else
	WaitForSingleObject(m_waiter,INFINITE);
#endif
}

void CWaiter::unlock() {
#ifndef _WIN32
	pthread_mutex_unlock(&m_waiter);
#else
	SetEvent(m_waiter);
#endif
}

int CWaiter::waitForSignal(int timeout) {
#ifndef _WIN32
	if (timeout > 0) {
		int   secs  = timeout / 1000;
		int   msecs = timeout % 1000;
		struct timespec   abstime = { time(NULL) + secs, msecs * 1000L };
		int rc = pthread_cond_timedwait(&m_condition,&m_waiter,&abstime);
		if (rc != 0) {
			return -1;
		}
	} else {
		pthread_cond_wait(&m_condition,&m_waiter);
	}
#else
	WaitForSingleObject(m_waiter,timeout);
#endif
	return 0;
}

void CWaiter::sendSignalNoLock() {
#ifndef _WIN32
	pthread_cond_signal(&m_condition);
#else
	SetEvent(m_waiter);
#endif
}

void CWaiter::sendSignal() {
	lock();
	sendSignalNoLock();
	unlock();
}

void CWaiter::broadcastSignalNoLock() {
#ifndef _WIN32
	pthread_cond_broadcast(&m_condition);

#endif
}

void CWaiter::broadcastSignal() {
	lock();
	broadcastSignalNoLock();
	unlock();
}
