1/* 2 * Copyright (c) 1997 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/param.h> 34#include <sys/types.h> 35#include <sys/signalvar.h> 36#include <errno.h> 37#include <signal.h> 38#include <string.h> 39#include <pthread.h> 40#include "un-namespace.h" 41#include "thr_private.h" 42 43__weak_reference(_pthread_sigmask, pthread_sigmask); 44 45int 46_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset) 47{ 48 struct pthread *curthread = _get_curthread(); 49 sigset_t oldset, newset; 50 int ret; 51 52 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM) { 53 ret = __sys_sigprocmask(how, set, oset); 54 if (ret != 0) 55 ret = errno; 56 /* Get a fresh copy */ 57 __sys_sigprocmask(SIG_SETMASK, NULL, &curthread->sigmask); 58 return (ret); 59 } 60 61 if (set) 62 newset = *set; 63 64 THR_SCHED_LOCK(curthread, curthread); 65 66 ret = 0; 67 if (oset != NULL) 68 /* Return the current mask: */ 69 oldset = curthread->sigmask; 70 71 /* Check if a new signal set was provided by the caller: */ 72 if (set != NULL) { 73 /* Process according to what to do: */ 74 switch (how) { 75 /* Block signals: */ 76 case SIG_BLOCK: 77 /* Add signals to the existing mask: */ 78 SIGSETOR(curthread->sigmask, newset); 79 break; 80 81 /* Unblock signals: */ 82 case SIG_UNBLOCK: 83 /* Clear signals from the existing mask: */ 84 SIGSETNAND(curthread->sigmask, newset); 85 break; 86 87 /* Set the signal process mask: */ 88 case SIG_SETMASK: 89 /* Set the new mask: */ 90 curthread->sigmask = newset; 91 break; 92 93 /* Trap invalid actions: */ 94 default: 95 /* Return an invalid argument: */ 96 ret = EINVAL; 97 break; 98 } 99 SIG_CANTMASK(curthread->sigmask); 100 THR_SCHED_UNLOCK(curthread, curthread); 101 102 /* 103 * Run down any pending signals: 104 */ 105 if (ret == 0) 106 _thr_sig_check_pending(curthread); 107 } else 108 THR_SCHED_UNLOCK(curthread, curthread); 109 110 if (ret == 0 && oset != NULL) 111 *oset = oldset; 112 return (ret); 113} 114