2 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/param.h>
33 #include <sys/signalvar.h>
36 #include "pthread_private.h"
38 __weak_reference(__sigsuspend, sigsuspend);
41 _sigsuspend(const sigset_t * set)
43 struct pthread *curthread = _get_curthread();
45 sigset_t oset, sigset;
47 /* Check if a new signal set was provided by the caller: */
49 /* Save the current signal mask: */
50 oset = curthread->sigmask;
52 /* Change the caller's mask: */
53 curthread->sigmask = *set;
56 * Check if there are pending signals for the running
57 * thread or process that aren't blocked:
59 sigset = curthread->sigpend;
60 SIGSETOR(sigset, _process_sigpending);
61 SIGSETNAND(sigset, curthread->sigmask);
62 if (SIGNOTEMPTY(sigset)) {
64 * Call the kernel scheduler which will safely
65 * install a signal frame for the running thread:
67 _thread_kern_sched_sig();
69 /* Wait for a signal: */
70 _thread_kern_sched_state(PS_SIGSUSPEND,
74 /* Always return an interrupted error: */
77 /* Restore the signal mask: */
78 curthread->sigmask = oset;
80 /* Return an invalid argument error: */
84 /* Return the completion status: */
89 __sigsuspend(const sigset_t * set)
93 _thread_enter_cancellation_point();
94 ret = _sigsuspend(set);
95 _thread_leave_cancellation_point();