freebsd-dev/lib/libthr/thread/thr_mutexattr.c
Pedro F. Giffuni b6413b6db8 POSIX compliance improvements in the pthread(3) functions.
This basically adds makes use of the C99 restrict keyword, and also
adds some 'const's to four threading functions: pthread_mutexattr_gettype(),
pthread_mutexattr_getprioceiling(), pthread_mutexattr_getprotocol(), and
pthread_mutex_getprioceiling. The changes are in accordance to POSIX/SUSv4-2018.

Hinted by:	DragonFlyBSD

Relnotes:	yes
MFC after:	1 month
Differential Revision:	D16722
2018-08-18 01:05:38 +00:00

296 lines
8.0 KiB
C

/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1996 Jeffrey Hsu <hsu@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, 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. 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 AUTHOR 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.
*/
/*
* Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
* 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, 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. 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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <pthread.h>
#include <pthread_np.h>
#include "un-namespace.h"
#include "thr_private.h"
__weak_reference(_pthread_mutexattr_init, pthread_mutexattr_init);
__weak_reference(_pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
__weak_reference(_pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
__weak_reference(_pthread_mutexattr_gettype, pthread_mutexattr_gettype);
__weak_reference(_pthread_mutexattr_settype, pthread_mutexattr_settype);
__weak_reference(_pthread_mutexattr_destroy, pthread_mutexattr_destroy);
__weak_reference(_pthread_mutexattr_getpshared, pthread_mutexattr_getpshared);
__weak_reference(_pthread_mutexattr_setpshared, pthread_mutexattr_setpshared);
__weak_reference(_pthread_mutexattr_getprotocol, pthread_mutexattr_getprotocol);
__weak_reference(_pthread_mutexattr_setprotocol, pthread_mutexattr_setprotocol);
__weak_reference(_pthread_mutexattr_getprioceiling,
pthread_mutexattr_getprioceiling);
__weak_reference(_pthread_mutexattr_setprioceiling,
pthread_mutexattr_setprioceiling);
__weak_reference(_pthread_mutexattr_getrobust, pthread_mutexattr_getrobust);
__weak_reference(_pthread_mutexattr_setrobust, pthread_mutexattr_setrobust);
int
_pthread_mutexattr_init(pthread_mutexattr_t *attr)
{
int ret;
pthread_mutexattr_t pattr;
if ((pattr = (pthread_mutexattr_t)
malloc(sizeof(struct pthread_mutex_attr))) == NULL) {
ret = ENOMEM;
} else {
memcpy(pattr, &_pthread_mutexattr_default,
sizeof(struct pthread_mutex_attr));
*attr = pattr;
ret = 0;
}
return (ret);
}
int
_pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
{
int ret;
if (attr == NULL || *attr == NULL) {
errno = EINVAL;
ret = -1;
} else {
(*attr)->m_type = kind;
ret = 0;
}
return(ret);
}
int
_pthread_mutexattr_getkind_np(pthread_mutexattr_t attr)
{
int ret;
if (attr == NULL) {
errno = EINVAL;
ret = -1;
} else {
ret = attr->m_type;
}
return (ret);
}
int
_pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
{
int ret;
if (attr == NULL || *attr == NULL || type >= PTHREAD_MUTEX_TYPE_MAX) {
ret = EINVAL;
} else {
(*attr)->m_type = type;
ret = 0;
}
return (ret);
}
int
_pthread_mutexattr_gettype(const pthread_mutexattr_t * __restrict attr,
int * __restrict type)
{
int ret;
if (attr == NULL || *attr == NULL || (*attr)->m_type >=
PTHREAD_MUTEX_TYPE_MAX) {
ret = EINVAL;
} else {
*type = (*attr)->m_type;
ret = 0;
}
return (ret);
}
int
_pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
{
int ret;
if (attr == NULL || *attr == NULL) {
ret = EINVAL;
} else {
free(*attr);
*attr = NULL;
ret = 0;
}
return (ret);
}
int
_pthread_mutexattr_getpshared(const pthread_mutexattr_t *attr,
int *pshared)
{
if (attr == NULL || *attr == NULL)
return (EINVAL);
*pshared = (*attr)->m_pshared;
return (0);
}
int
_pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int pshared)
{
if (attr == NULL || *attr == NULL ||
(pshared != PTHREAD_PROCESS_PRIVATE &&
pshared != PTHREAD_PROCESS_SHARED))
return (EINVAL);
(*attr)->m_pshared = pshared;
return (0);
}
int
_pthread_mutexattr_getprotocol(const pthread_mutexattr_t * __restrict mattr,
int * __restrict protocol)
{
int ret = 0;
if (mattr == NULL || *mattr == NULL)
ret = EINVAL;
else
*protocol = (*mattr)->m_protocol;
return (ret);
}
int
_pthread_mutexattr_setprotocol(pthread_mutexattr_t *mattr, int protocol)
{
int ret = 0;
if (mattr == NULL || *mattr == NULL ||
protocol < PTHREAD_PRIO_NONE || protocol > PTHREAD_PRIO_PROTECT)
ret = EINVAL;
else {
(*mattr)->m_protocol = protocol;
(*mattr)->m_ceiling = THR_MAX_RR_PRIORITY;
}
return (ret);
}
int
_pthread_mutexattr_getprioceiling(const pthread_mutexattr_t * __restrict mattr,
int * __restrict prioceiling)
{
int ret = 0;
if (mattr == NULL || *mattr == NULL)
ret = EINVAL;
else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
ret = EINVAL;
else
*prioceiling = (*mattr)->m_ceiling;
return (ret);
}
int
_pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mattr, int prioceiling)
{
int ret = 0;
if (mattr == NULL || *mattr == NULL)
ret = EINVAL;
else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
ret = EINVAL;
else
(*mattr)->m_ceiling = prioceiling;
return (ret);
}
int
_pthread_mutexattr_getrobust(pthread_mutexattr_t *mattr, int *robust)
{
int ret;
if (mattr == NULL || *mattr == NULL) {
ret = EINVAL;
} else {
ret = 0;
*robust = (*mattr)->m_robust;
}
return (ret);
}
int
_pthread_mutexattr_setrobust(pthread_mutexattr_t *mattr, int robust)
{
int ret;
if (mattr == NULL || *mattr == NULL) {
ret = EINVAL;
} else if (robust != PTHREAD_MUTEX_STALLED &&
robust != PTHREAD_MUTEX_ROBUST) {
ret = EINVAL;
} else {
ret = 0;
(*mattr)->m_robust = robust;
}
return (ret);
}