freebsd-dev/lib/libthr/thread/thr_barrierattr.c

/*
 * Copyright (c) 2003 David Xu <davidxu@freebsd.org>.
 * All rights reserved.
 *
 * 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(s), this list of conditions and the following disclaimer as
 *    the first lines of this file unmodified other than the possible 
 *    addition of one or more copyright notices.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice(s), this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 COPYRIGHT HOLDER(S) 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.
 *
 * $FreeBSD$
 */

#include "namespace.h"
#include <errno.h>
#include <stdlib.h>
#include <pthread.h>
#include "un-namespace.h"

#include "thr_private.h"

__weak_reference(_pthread_barrierattr_destroy, pthread_barrierattr_destroy);
__weak_reference(_pthread_barrierattr_init, pthread_barrierattr_init);
__weak_reference(_pthread_barrierattr_setpshared,
	pthread_barrierattr_setpshared);
__weak_reference(_pthread_barrierattr_getpshared,
	pthread_barrierattr_getpshared);

int
_pthread_barrierattr_destroy(pthread_barrierattr_t *attr)
{

	if (attr == NULL || *attr == NULL)
		return (EINVAL);

	free(*attr);
	return (0);
}

int
_pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr,
	int *pshared)
{

	if (attr == NULL || *attr == NULL)
		return (EINVAL);

	*pshared = (*attr)->pshared;
	return (0);
}

int
_pthread_barrierattr_init(pthread_barrierattr_t *attr)
{

	if (attr == NULL)
		return (EINVAL);

	if ((*attr = malloc(sizeof(struct pthread_barrierattr))) == NULL)
		return (ENOMEM);

	(*attr)->pshared = PTHREAD_PROCESS_PRIVATE;
	return (0);
}

int
_pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
{

	if (attr == NULL || *attr == NULL)
		return (EINVAL);

	/* Only PTHREAD_PROCESS_PRIVATE is supported. */
	if (pshared != PTHREAD_PROCESS_PRIVATE)
		return (EINVAL);

	(*attr)->pshared = pshared;
	return (0);
}