/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 * The contents of this file are subject to the Netscape Public License
 * Version 1.0 (the "NPL"); you may not use this file except in
 * compliance with the NPL.  You may obtain a copy of the NPL at
 * http://www.mozilla.org/NPL/
 * 
 * Software distributed under the NPL is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
 * for the specific language governing rights and limitations under the
 * NPL.
 * 
 * The Initial Developer of this code under the NPL is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
 * Reserved.
 */

/*
 * OS/2-specific semaphore handling code.
 *
 */

#include "primpl.h"


PR_IMPLEMENT(void) 
_PR_MD_NEW_SEM(_MDSemaphore *md, PRUintn value)
{
   int rv;

    /* Our Sems don't support a value > 1 */
    PR_ASSERT(value <= 1);

    rv = DosCreateEventSem(NULL, &md->sem, 0, 0);
    PR_ASSERT(rv == NO_ERROR);
}

PR_IMPLEMENT(void) 
_PR_MD_DESTROY_SEM(_MDSemaphore *md)
{
   int rv;
   rv = DosCloseEventSem(md->sem);
   PR_ASSERT(rv == NO_ERROR);

}

PR_IMPLEMENT(PRStatus) 
_PR_MD_TIMED_WAIT_SEM(_MDSemaphore *md, PRIntervalTime ticks)
{
    int rv;
    rv = DosWaitEventSem(md->sem, PR_IntervalToMilliseconds(ticks));

    if (rv == NO_ERROR)
        return PR_SUCCESS;
    else
        return PR_FAILURE;
}

PR_IMPLEMENT(PRStatus) 
_PR_MD_WAIT_SEM(_MDSemaphore *md)
{
    return _PR_MD_TIMED_WAIT_SEM(md, PR_INTERVAL_NO_TIMEOUT);
}

PR_IMPLEMENT(void) 
_PR_MD_POST_SEM(_MDSemaphore *md)
{
   int rv;
   rv = DosPostEventSem(md->sem);
   PR_ASSERT(rv == NO_ERROR); 
}