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/*
* Copyright (c) 1997 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 <sys/param.h>
#include <sys/types.h>
#include <sys/signalvar.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <pthread.h>
#include "thr_private.h"
__weak_reference(_pthread_sigmask, pthread_sigmask);
int
_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
{
struct pthread *curthread = _get_curthread();
sigset_t oldset, newset;
int ret;
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
ret = __sys_sigprocmask(how, set, oset);
if (ret != 0)
ret = errno;
/* Get a fresh copy */
__sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask);
return (ret);
}
if (set)
newset = *set;
THR_SCHED_LOCK(curthread, curthread);
ret = 0;
if (oset != NULL)
/* Return the current mask: */
oldset = curthread->sigmask;
/* Check if a new signal set was provided by the caller: */
if (set != NULL) {
/* Process according to what to do: */
switch (how) {
/* Block signals: */
case SIG_BLOCK:
/* Add signals to the existing mask: */
SIGSETOR(curthread->sigmask, newset);
break;
/* Unblock signals: */
case SIG_UNBLOCK:
/* Clear signals from the existing mask: */
SIGSETNAND(curthread->sigmask, newset);
break;
/* Set the signal process mask: */
case SIG_SETMASK:
/* Set the new mask: */
curthread->sigmask = newset;
break;
/* Trap invalid actions: */
default:
/* Return an invalid argument: */
ret = EINVAL;
break;
}
SIG_CANTMASK(curthread->sigmask);
THR_SCHED_UNLOCK(curthread, curthread);
/*
* Run down any pending signals:
*/
if (ret == 0)
_thr_sig_check_pending(curthread);
} else
THR_SCHED_UNLOCK(curthread, curthread);
if (ret == 0 && oset != NULL)
*oset = oldset;
return (ret);
}
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