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e81bbed597
yet, so we can protect some locking code from being interrupted by signal handling. When KSE mode is turned on, reset the thread flag to scope process except we are running in 1:1 mode which we needn't turn it off. Also remove some unused member variables in structure kse. Tested by: deischen
115 lines
3.5 KiB
C
115 lines
3.5 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 AUTHOR 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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/signalvar.h>
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#include <errno.h>
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#include <signal.h>
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#include <string.h>
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#include <pthread.h>
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#include "thr_private.h"
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__weak_reference(_pthread_sigmask, pthread_sigmask);
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int
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_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
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{
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struct pthread *curthread = _get_curthread();
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sigset_t oldset, newset;
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int ret;
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if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) {
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ret = __sys_sigprocmask(how, set, oset);
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if (ret != 0)
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ret = errno;
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/* Get a copy for thread dump */
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__sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask);
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return (ret);
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}
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if (set)
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newset = *set;
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THR_SCHED_LOCK(curthread, curthread);
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ret = 0;
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if (oset != NULL)
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/* Return the current mask: */
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oldset = curthread->sigmask;
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/* Check if a new signal set was provided by the caller: */
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if (set != NULL) {
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/* Process according to what to do: */
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switch (how) {
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/* Block signals: */
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case SIG_BLOCK:
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/* Add signals to the existing mask: */
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SIGSETOR(curthread->sigmask, newset);
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break;
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/* Unblock signals: */
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case SIG_UNBLOCK:
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/* Clear signals from the existing mask: */
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SIGSETNAND(curthread->sigmask, newset);
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break;
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/* Set the signal process mask: */
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case SIG_SETMASK:
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/* Set the new mask: */
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curthread->sigmask = newset;
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break;
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/* Trap invalid actions: */
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default:
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/* Return an invalid argument: */
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errno = EINVAL;
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ret = -1;
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break;
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}
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SIG_CANTMASK(curthread->sigmask);
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THR_SCHED_UNLOCK(curthread, curthread);
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/*
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* Run down any pending signals:
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*/
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if (ret == 0)
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_thr_sig_check_pending(curthread);
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} else
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THR_SCHED_UNLOCK(curthread, curthread);
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if (ret == 0 && oset != NULL)
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*oset = oldset;
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return (ret);
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}
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