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/*
* Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
* All rights reserved.
*
* Modified and extended by Antony T Curtis <antony.curtis@olcs.net>
* for use with OS/2.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by John Birrell.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <stdlib.h>
#include <errno.h>
#ifdef _THREAD_SAFE
int
pthread_mutex_init(pthread_mutex_t * mutex,
const pthread_mutexattr_t * mutex_attr)
{
(void) DosCreateMutexSem(NULL,mutex,0,0);
return (0); /* Return the completion status: */
}
int
pthread_mutex_destroy(pthread_mutex_t * mutex)
{
APIRET rc;
do
{
rc = DosCloseMutexSem(*mutex);
if (rc == 301) DosReleaseMutexSem(*mutex);
} while (rc == 301);
*mutex = 0;
return (0); /* Return the completion status: */
}
int
pthread_mutex_lock(pthread_mutex_t * mutex)
{
APIRET rc;
rc = DosRequestMutexSem(*mutex,SEM_INDEFINITE_WAIT);
if (rc)
return(EINVAL);
return (0); /* Return the completion status: */
}
int
pthread_mutex_unlock(pthread_mutex_t * mutex)
{
(void) DosReleaseMutexSem(*mutex);
return (0); /* Return the completion status: */
}
#endif
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