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090b336154
is system bound thread and when it is blocked, no upcall is generated. o Add ability to libkse to allow it run in pure 1:1 threading mode, defining SYSTEM_SCOPE_ONLY in Makefile can turn on this option. o Eliminate code for installing dummy signal handler for sigwait call. o Add hash table to find thread. Reviewed by: deischen
105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*
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* Copyright (c) 1995 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 <signal.h>
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#include <errno.h>
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#include <pthread.h>
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#include <string.h>
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#include <sys/signalvar.h>
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#include "thr_private.h"
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__weak_reference(__sigsuspend, sigsuspend);
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int
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_sigsuspend(const sigset_t *set)
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{
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struct pthread *curthread = _get_curthread();
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sigset_t oldmask, newmask;
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int ret = -1;
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if (!_kse_isthreaded() ||
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(curthread->attr.flags & PTHREAD_SCOPE_SYSTEM))
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return (__sys_sigsuspend(set));
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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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newmask = *set;
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SIG_CANTMASK(newmask);
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THR_LOCK_SWITCH(curthread);
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/* Save current sigmask */
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memcpy(&oldmask, &curthread->sigmask, sizeof(sigset_t));
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/* Change the caller's mask: */
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memcpy(&curthread->sigmask, &newmask, sizeof(sigset_t));
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THR_SET_STATE(curthread, PS_SIGSUSPEND);
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/* Wait for a signal: */
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_thr_sched_switch_unlocked(curthread);
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/* Always return an interrupted error: */
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errno = EINTR;
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THR_SCHED_LOCK(curthread, curthread);
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/* Restore the signal mask: */
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memcpy(&curthread->sigmask, &oldmask, sizeof(sigset_t));
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THR_SCHED_UNLOCK(curthread, curthread);
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/*
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* signal mask is reloaded, need to check if there is
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* pending proc signal I can handle.
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*/
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_thr_sig_check_pending(curthread);
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} else {
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/* Return an invalid argument error: */
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errno = EINVAL;
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}
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/* Return the completion status: */
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return (ret);
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}
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int
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__sigsuspend(const sigset_t * set)
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{
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struct pthread *curthread = _get_curthread();
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int ret;
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_thr_enter_cancellation_point(curthread);
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ret = _sigsuspend(set);
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_thr_leave_cancellation_point(curthread);
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return (ret);
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}
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