sigsuspend.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 1994-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/fault.h>
#include <sys/procset.h>
#include <sys/signal.h>
#include <sys/schedctl.h>
#include <sys/debug.h>
int
sigsuspend(sigset_t *setp)
{
sigset_t set;
k_sigset_t kset;
proc_t *p = curproc;
if (copyin((caddr_t)setp, (caddr_t)&set, sizeof (sigset_t)))
return (set_errno(EFAULT));
sigutok(&set, &kset);
mutex_enter(&p->p_lock);
schedctl_finish_sigblock(curthread);
ttolwp(curthread)->lwp_sigoldmask = curthread->t_hold;
curthread->t_hold = kset;
curthread->t_sig_check = 1; /* so post-syscall will re-evaluate */
curthread->t_flag |= T_TOMASK;
/* pause() */
while (cv_wait_sig_swap(&curthread->t_delay_cv, &p->p_lock))
;
mutex_exit(&p->p_lock);
return (set_errno(EINTR));
}