9ad4b64459
to make it work, turnstile like mechanism to support priority propagating and other realtime scheduling options in kernel should be available to userland mutex, for the moment, I just want to make libthr be simple and efficient thread library. Discussed with: deischen, julian
259 lines
7.4 KiB
C
259 lines
7.4 KiB
C
/*
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* Copyright (c) 1996 Jeffrey Hsu <hsu@freebsd.org>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Copyright (c) 1997 John Birrell <jb@cimlogic.com.au>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <pthread.h>
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#include "thr_private.h"
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__weak_reference(_pthread_mutexattr_init, pthread_mutexattr_init);
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__weak_reference(_pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np);
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__weak_reference(_pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np);
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__weak_reference(_pthread_mutexattr_gettype, pthread_mutexattr_gettype);
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__weak_reference(_pthread_mutexattr_settype, pthread_mutexattr_settype);
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__weak_reference(_pthread_mutexattr_destroy, pthread_mutexattr_destroy);
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__weak_reference(_pthread_mutexattr_getpshared, pthread_mutexattr_getpshared);
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__weak_reference(_pthread_mutexattr_setpshared, pthread_mutexattr_setpshared);
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__weak_reference(_pthread_mutexattr_getprotocol, pthread_mutexattr_getprotocol);
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__weak_reference(_pthread_mutexattr_setprotocol, pthread_mutexattr_setprotocol);
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__weak_reference(_pthread_mutexattr_getprioceiling, pthread_mutexattr_getprioceiling);
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__weak_reference(_pthread_mutexattr_setprioceiling, pthread_mutexattr_setprioceiling);
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int
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_pthread_mutexattr_init(pthread_mutexattr_t *attr)
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{
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int ret;
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pthread_mutexattr_t pattr;
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if ((pattr = (pthread_mutexattr_t)
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malloc(sizeof(struct pthread_mutex_attr))) == NULL) {
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ret = ENOMEM;
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} else {
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memcpy(pattr, &_pthread_mutexattr_default,
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sizeof(struct pthread_mutex_attr));
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*attr = pattr;
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ret = 0;
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}
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return (ret);
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}
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int
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_pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind)
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{
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int ret;
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if (attr == NULL || *attr == NULL) {
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errno = EINVAL;
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ret = -1;
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} else {
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(*attr)->m_type = kind;
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ret = 0;
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}
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return(ret);
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}
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int
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_pthread_mutexattr_getkind_np(pthread_mutexattr_t attr)
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{
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int ret;
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if (attr == NULL) {
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errno = EINVAL;
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ret = -1;
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} else {
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ret = attr->m_type;
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}
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return(ret);
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}
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int
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_pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
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{
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int ret;
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if (attr == NULL || *attr == NULL || type >= PTHREAD_MUTEX_TYPE_MAX) {
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errno = EINVAL;
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ret = -1;
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} else {
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(*attr)->m_type = type;
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ret = 0;
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}
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return(ret);
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}
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int
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_pthread_mutexattr_gettype(pthread_mutexattr_t *attr, int *type)
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{
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int ret;
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if (attr == NULL || *attr == NULL || (*attr)->m_type >=
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PTHREAD_MUTEX_TYPE_MAX) {
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ret = EINVAL;
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} else {
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*type = (*attr)->m_type;
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ret = 0;
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}
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return ret;
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}
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int
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_pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
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{
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int ret;
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if (attr == NULL || *attr == NULL) {
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ret = EINVAL;
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} else {
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free(*attr);
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*attr = NULL;
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ret = 0;
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}
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return(ret);
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}
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int
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_pthread_mutexattr_getpshared(const pthread_mutexattr_t *attr,
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int *pshared)
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{
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if (attr == NULL || *attr == NULL)
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return (EINVAL);
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*pshared = PTHREAD_PROCESS_PRIVATE;
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return (0);
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}
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int
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_pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int pshared)
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{
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if (attr == NULL || *attr == NULL)
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return (EINVAL);
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/* Only PTHREAD_PROCESS_PRIVATE is supported. */
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if (pshared != PTHREAD_PROCESS_PRIVATE)
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return (EINVAL);
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return (0);
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}
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int
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_pthread_mutexattr_getprotocol(pthread_mutexattr_t *mattr, int *protocol)
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{
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int ret = 0;
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if ((mattr == NULL) || (*mattr == NULL))
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ret = EINVAL;
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else
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*protocol = (*mattr)->m_protocol;
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return(ret);
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}
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int
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_pthread_mutexattr_setprotocol(pthread_mutexattr_t *mattr, int protocol)
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{
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int ret = 0;
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if ((mattr == NULL) || (*mattr == NULL) ||
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(protocol < PTHREAD_PRIO_NONE) || (protocol > PTHREAD_PRIO_PROTECT))
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ret = EINVAL;
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else {
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(*mattr)->m_protocol = protocol;
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(*mattr)->m_ceiling = THR_MAX_PRIORITY;
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}
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return(ret);
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}
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int
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_pthread_mutexattr_getprioceiling(pthread_mutexattr_t *mattr, int *prioceiling)
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{
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int ret = 0;
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if ((mattr == NULL) || (*mattr == NULL))
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ret = EINVAL;
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else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
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ret = EINVAL;
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else
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*prioceiling = (*mattr)->m_ceiling;
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return(ret);
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}
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int
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_pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mattr, int prioceiling)
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{
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int ret = 0;
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if ((mattr == NULL) || (*mattr == NULL))
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ret = EINVAL;
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else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
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ret = EINVAL;
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else
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(*mattr)->m_ceiling = prioceiling;
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return(ret);
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}
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