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136 lines
4.2 KiB
C
Executable File
136 lines
4.2 KiB
C
Executable File
/* ==== pthread_atexit.c =====================================================
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* Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
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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 Chris Provenzano.
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* 4. The name of Chris Provenzano may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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* Description : Pthread attribute functions.
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*
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* 1.20 94/02/13 proven
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* -Started coding this file.
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*/
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#ifndef lint
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static const char rcsid[] = "$Id$";
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#endif
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#define PTHREAD_KERNEL
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "pthreadutil.h"
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static int pthread_atexit_inited = 0;
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static pthread_key_t pthread_atexit_key;
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static pthread_mutex_t pthread_atexit_mutex = PTHREAD_MUTEX_INITIALIZER;
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/* ==========================================================================
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* pthread_atexit_done()
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*/
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static void pthread_atexit_done(void * arg)
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{
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pthread_atexit_t id, id_next;
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for (id = arg; id; id = id_next) {
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id_next = id->next;
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id->rtn(id->arg);
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free(id);
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}
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}
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/* ==========================================================================
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* pthread_atexit_add()
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*/
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int pthread_atexit_add(pthread_atexit_t *id, void (*rtn)(void *), void * arg)
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{
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int ret;
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if (ret = pthread_mutex_lock(&pthread_atexit_mutex)) {
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return(ret);
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}
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if (!pthread_atexit_inited) {
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if (ret = pthread_key_create(&pthread_atexit_key, pthread_atexit_done)){
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pthread_mutex_unlock(&pthread_atexit_mutex);
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return(ret);
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}
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pthread_atexit_inited++;
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}
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pthread_mutex_unlock(&pthread_atexit_mutex);
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if ((*id) = (pthread_atexit_t)malloc(sizeof(struct pthread_atexit))) {
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if ((*id)->next = pthread_getspecific(pthread_atexit_key)) {
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(*id)->next->prev = (*id);
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}
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pthread_setspecific(pthread_atexit_key, (void *)*id);
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(*id)->prev = NULL;
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(*id)->rtn = rtn;
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(*id)->arg = arg;
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return(OK);
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}
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return(ENOMEM);
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}
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/* ==========================================================================
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* pthread_atexit_remove()
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*/
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int pthread_atexit_remove(pthread_atexit_t * id, int execute)
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{
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pthread_atexit_t old;
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if (old = pthread_getspecific(pthread_atexit_key)) {
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if (old == *id) {
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old = old->next;
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old->prev = NULL;
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pthread_setspecific(pthread_atexit_key, old);
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} else {
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if ((*id)->next) {
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(*id)->next->prev = (*id)->prev;
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}
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(*id)->prev->next = (*id)->next;
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}
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if (execute) {
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(*id)->rtn((*id)->arg);
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}
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free((*id));
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return(OK);
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}
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return(EINVAL);
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}
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/* ==========================================================================
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* A few non void functions that are often used as void functions
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*/
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void fflush_nrv(void * fp) { fflush((FILE *)fp); }
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void fclose_nrv(void * fp) { fclose((FILE *)fp); }
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void pthread_attr_destroy_nrv(void * attr)
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{
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pthread_attr_destroy((pthread_attr_t *)attr);
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}
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