117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*
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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 REGENTS 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 <errno.h>
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#include <signal.h>
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#ifdef _THREAD_SAFE
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#include <pthread.h>
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#include "pthread_private.h"
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int
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pthread_kill(pthread_t pthread, int sig)
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{
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int ret;
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/* Check for invalid signal numbers: */
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if (sig < 0 || sig >= NSIG)
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/* Invalid signal: */
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ret = EINVAL;
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/* Ignored signals get dropped on the floor. */
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else if (_thread_sigact[sig - 1].sa_handler == SIG_IGN)
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ret = 0;
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/* Find the thread in the list of active threads: */
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else if ((ret = _find_thread(pthread)) == 0) {
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switch (pthread->state) {
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case PS_SIGSUSPEND:
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/*
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* Only wake up the thread if the signal is unblocked
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* and there is a handler installed for the signal.
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*/
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if (!sigismember(&pthread->sigmask, sig) &&
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_thread_sigact[sig - 1].sa_handler != SIG_DFL) {
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/* Change the state of the thread to run: */
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PTHREAD_NEW_STATE(pthread,PS_RUNNING);
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/* Return the signal number: */
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pthread->signo = sig;
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}
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/* Increment the pending signal count: */
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sigaddset(&pthread->sigpend,sig);
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break;
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case PS_SIGWAIT:
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/* Wake up the thread if the signal is blocked. */
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if (sigismember(pthread->data.sigwait, sig)) {
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/* Change the state of the thread to run: */
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PTHREAD_NEW_STATE(pthread,PS_RUNNING);
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/* Return the signal number: */
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pthread->signo = sig;
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} else
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/* Increment the pending signal count. */
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sigaddset(&pthread->sigpend,sig);
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break;
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case PS_SELECT_WAIT:
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case PS_FDR_WAIT:
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case PS_FDW_WAIT:
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case PS_SLEEP_WAIT:
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if (!sigismember(&pthread->sigmask, sig) &&
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(_thread_sigact[sig - 1].sa_handler != SIG_IGN)) {
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/* Flag the operation as interrupted: */
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pthread->interrupted = 1;
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/* Change the state of the thread to run: */
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PTHREAD_NEW_STATE(pthread,PS_RUNNING);
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/* Return the signal number: */
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pthread->signo = sig;
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} else {
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/* Increment the pending signal count: */
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sigaddset(&pthread->sigpend,sig);
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}
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break;
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default:
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/* Increment the pending signal count: */
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sigaddset(&pthread->sigpend,sig);
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break;
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}
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}
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/* Return the completion status: */
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return (ret);
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}
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#endif
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