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 "namespace.h"
33 #include <sys/types.h>
34 #include <sys/signalvar.h>
39 #include "un-namespace.h"
40 #include "thr_private.h"
42 int __sigsuspend(const sigset_t * set);
44 __weak_reference(__sigsuspend, sigsuspend);
47 _sigsuspend(const sigset_t *set)
49 struct pthread *curthread = _get_curthread();
50 sigset_t oldmask, newmask, tempset;
53 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
54 return (__sys_sigsuspend(set));
56 /* Check if a new signal set was provided by the caller: */
59 SIG_CANTMASK(newmask);
60 THR_LOCK_SWITCH(curthread);
62 /* Save current sigmask: */
63 oldmask = curthread->sigmask;
64 curthread->oldsigmask = &oldmask;
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);
75 curthread->check_pending = 1;
76 THR_UNLOCK_SWITCH(curthread);
77 /* check pending signal I can handle: */
78 _thr_sig_check_pending(curthread);
80 if ((curthread->cancelflags & THR_CANCELLING) != 0)
81 curthread->oldsigmask = NULL;
83 THR_ASSERT(curthread->oldsigmask == NULL,
84 "oldsigmask is not cleared");
87 /* Always return an interrupted error: */
90 /* Return an invalid argument error: */
94 /* Return the completion status: */
99 __sigsuspend(const sigset_t * set)
101 struct pthread *curthread = _get_curthread();
104 _thr_cancel_enter(curthread);
105 ret = _sigsuspend(set);
106 _thr_cancel_leave(curthread, 1);