pthread_kill.c
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上传日期:2007-04-14
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- /* ==== pthread_kill.c =======================================================
- * Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Chris Provenzano.
- * 4. The name of Chris Provenzano may not be used to endorse or promote
- * products derived from this software without specific prior written
- * permission.
- *
- * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO ``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 CHRIS PROVENZANO 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.
- *
- * Description : pthread_kill function.
- *
- * 1.32 94/06/12 proven
- * -Started coding this file.
- */
- #ifndef lint
- static const char rcsid[] = "$Id$";
- #endif
- #include <pthread.h>
- /* Defined in sig.c, a linked list of threads currently
- * blocked in sigwait(): */
- extern struct pthread * pthread_sigwait;
- /* ==========================================================================
- * pthread_kill()
- */
- int pthread_kill(struct pthread * pthread, int sig)
- {
- struct pthread ** pthread_ptr;
- pthread_sched_prevent();
- /* Check who is the current owner of pthread */
- /* if (pthread->kthread != pthread_run->kthread) { */
- if (0) {
- } else {
- if (pthread->state == PS_SIGWAIT) {
- if(sigismember(pthread->data.sigwait, sig)) {
- for (pthread_ptr = &pthread_sigwait;
- (*pthread_ptr);
- pthread_ptr = &((*pthread_ptr)->next)) {
- if ((*pthread_ptr) == pthread) {
- /* Take the thread out of the
- * pthread_sigwait linked list: */
- *pthread_ptr=(*pthread_ptr)->next;
-
- *(int *)(pthread->ret) = sig;
- pthread_sched_other_resume(pthread);
- return(OK);
- }
- }
- /* A thread should not be in the state PS_SIGWAIT
- * without being in the pthread_sigwait linked
- * list: */
- PANIC();
- }
- }
- if (!sigismember(&pthread->sigpending,sig)) /* Added by monty */
- {
- sigaddset(&(pthread->sigpending), sig);
- pthread->sigcount++;
- }
- }
- pthread_sched_resume();
- return(OK);
- }