freebsd-skq/lib/libkse/thread/thr_sigmask.c

76 lines
2.7 KiB
C

/*
* 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 <pthread.h>
#include "thr_private.h"
__weak_reference(_pthread_sigmask, pthread_sigmask);
int
_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
{
int i;
struct pthread *curthread = _get_curthread();
if (oset != NULL)
bcopy(&curthread->mailbox.tm_context.uc_sigmask, oset,
sizeof(sigset_t));
if (set == NULL)
return (0);
switch (how) {
case SIG_BLOCK:
for (i = 0; i < _SIG_WORDS; i++)
curthread->mailbox.tm_context.uc_sigmask.__bits[i] |=
set->__bits[i];
break;
case SIG_UNBLOCK:
for (i = 0; i < _SIG_WORDS; i++)
curthread->mailbox.tm_context.uc_sigmask.__bits[i] &=
~set->__bits[i];
break;
case SIG_SETMASK:
bcopy(set, &curthread->mailbox.tm_context.uc_sigmask,
sizeof(sigset_t));
break;
default:
errno = EINVAL;
return (-1);
}
return (0);
}