aafea422a5
the process as well as pending on the current thread. Reported by: Andrew MacIntyre <andymac@bullseye.apana.org.au>
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 1995 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by John Birrell.
|
|
* 4. 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include <signal.h>
|
|
#include <sys/param.h>
|
|
#include <sys/signalvar.h>
|
|
#include <errno.h>
|
|
#include <pthread.h>
|
|
#include "pthread_private.h"
|
|
|
|
__weak_reference(__sigsuspend, sigsuspend);
|
|
|
|
int
|
|
_sigsuspend(const sigset_t * set)
|
|
{
|
|
struct pthread *curthread = _get_curthread();
|
|
int ret = -1;
|
|
sigset_t oset, sigset;
|
|
|
|
/* Check if a new signal set was provided by the caller: */
|
|
if (set != NULL) {
|
|
/* Save the current signal mask: */
|
|
oset = curthread->sigmask;
|
|
|
|
/* Change the caller's mask: */
|
|
curthread->sigmask = *set;
|
|
|
|
/*
|
|
* Check if there are pending signals for the running
|
|
* thread or process that aren't blocked:
|
|
*/
|
|
sigset = curthread->sigpend;
|
|
SIGSETOR(sigset, _process_sigpending);
|
|
SIGSETNAND(sigset, curthread->sigmask);
|
|
if (SIGNOTEMPTY(sigset)) {
|
|
/*
|
|
* Call the kernel scheduler which will safely
|
|
* install a signal frame for the running thread:
|
|
*/
|
|
_thread_kern_sched_sig();
|
|
} else {
|
|
/* Wait for a signal: */
|
|
_thread_kern_sched_state(PS_SIGSUSPEND,
|
|
__FILE__, __LINE__);
|
|
}
|
|
|
|
/* Always return an interrupted error: */
|
|
errno = EINTR;
|
|
|
|
/* Restore the signal mask: */
|
|
curthread->sigmask = oset;
|
|
} else {
|
|
/* Return an invalid argument error: */
|
|
errno = EINVAL;
|
|
}
|
|
|
|
/* Return the completion status: */
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
__sigsuspend(const sigset_t * set)
|
|
{
|
|
int ret;
|
|
|
|
_thread_enter_cancellation_point();
|
|
ret = _sigsuspend(set);
|
|
_thread_leave_cancellation_point();
|
|
|
|
return ret;
|
|
}
|