/*

 * Copyright (c) 2020 Red Hat, Inc.

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston, MA

 * 02110-1301, USA. 

 *

 * $Id: //eng/uds-releases/jasper/kernelLinux/uds/threadCondVarLinuxKernel.c#2 $

 */

#include "threads.h"

#include "timeUtils.h"

#include "uds-error.h"

/**********************************************************************/

int initCond(CondVar *cv)

{

  cv->eventCount = NULL;

  return makeEventCount(&cv->eventCount);

}

/**********************************************************************/

int signalCond(CondVar *cv)

{

  eventCountBroadcast(cv->eventCount);

  return UDS_SUCCESS;

}

/**********************************************************************/

int broadcastCond(CondVar *cv)

{

  eventCountBroadcast(cv->eventCount);

  return UDS_SUCCESS;

}

/**********************************************************************/

int waitCond(CondVar *cv, Mutex *mutex)

{

  EventToken token = eventCountPrepare(cv->eventCount);

  unlockMutex(mutex);

  eventCountWait(cv->eventCount, token, NULL);

  lockMutex(mutex);

  return UDS_SUCCESS;

}

/**********************************************************************/

int timedWaitCond(CondVar *cv, Mutex *mutex, RelTime timeout)

{

  EventToken token = eventCountPrepare(cv->eventCount);

  unlockMutex(mutex);

  bool happened = eventCountWait(cv->eventCount, token, &timeout);

  lockMutex(mutex);

  return happened ? UDS_SUCCESS : ETIMEDOUT;

}

/**********************************************************************/

int destroyCond(CondVar *cv)

{

  freeEventCount(cv->eventCount);

  cv->eventCount = NULL;

  return UDS_SUCCESS;

}