1/* 2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 32#include "namespace.h" 33#include <sys/types.h> 34#include <sys/signalvar.h> 35#include <errno.h> 36#include <pthread.h> 37#include <signal.h> 38#include <string.h> 39#include "un-namespace.h" 40#include "thr_private.h" 41 42int __sigsuspend(const sigset_t * set); 43 44__weak_reference(__sigsuspend, sigsuspend); 45 46int 47_sigsuspend(const sigset_t *set) 48{ 49 struct pthread *curthread = _get_curthread(); 50 sigset_t oldmask, newmask, tempset; 51 int ret = -1; 52 53 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) 54 return (__sys_sigsuspend(set)); 55 56 /* Check if a new signal set was provided by the caller: */ 57 if (set != NULL) { 58 newmask = *set; 59 SIG_CANTMASK(newmask); 60 THR_LOCK_SWITCH(curthread); 61 62 /* Save current sigmask: */ 63 oldmask = curthread->sigmask; 64 curthread->oldsigmask = &oldmask; 65 66 /* Change the caller's mask: */ 67 curthread->sigmask = newmask; 68 tempset = curthread->sigpend; 69 SIGSETNAND(tempset, newmask); 70 if (SIGISEMPTY(tempset)) { 71 THR_SET_STATE(curthread, PS_SIGSUSPEND); 72 /* Wait for a signal: */ 73 _thr_sched_switch_unlocked(curthread); 74 } else { 75 curthread->check_pending = 1; 76 THR_UNLOCK_SWITCH(curthread); 77 /* check pending signal I can handle: */ 78 _thr_sig_check_pending(curthread); 79 } 80 if ((curthread->cancelflags & THR_CANCELLING) != 0) 81 curthread->oldsigmask = NULL; 82 else { 83 THR_ASSERT(curthread->oldsigmask == NULL, 84 "oldsigmask is not cleared"); 85 } 86 87 /* Always return an interrupted error: */ 88 errno = EINTR; 89 } else { 90 /* Return an invalid argument error: */ 91 errno = EINVAL; 92 } 93 94 /* Return the completion status: */ 95 return (ret); 96} 97 98int 99__sigsuspend(const sigset_t * set) 100{ 101 struct pthread *curthread = _get_curthread(); 102 int ret; 103 104 _thr_cancel_enter(curthread); 105 ret = _sigsuspend(set); 106 _thr_cancel_leave(curthread, 1); 107 108 return (ret); 109} 110