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/types.h>
33 #include <sys/signalvar.h>
39 #include "thr_private.h"
41 LT10_COMPAT_PRIVATE(__sigsuspend);
42 LT10_COMPAT_PRIVATE(_sigsuspend);
43 LT10_COMPAT_DEFAULT(sigsuspend);
45 __weak_reference(__sigsuspend, sigsuspend);
48 _sigsuspend(const sigset_t *set)
50 struct pthread *curthread = _get_curthread();
51 sigset_t oldmask, newmask, tempset;
54 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
55 return (__sys_sigsuspend(set));
57 /* Check if a new signal set was provided by the caller: */
60 SIG_CANTMASK(newmask);
61 THR_LOCK_SWITCH(curthread);
63 /* Save current sigmask: */
64 oldmask = curthread->sigmask;
65 curthread->oldsigmask = &oldmask;
67 /* Change the caller's mask: */
68 curthread->sigmask = newmask;
69 tempset = curthread->sigpend;
70 SIGSETNAND(tempset, newmask);
71 if (SIGISEMPTY(tempset)) {
72 THR_SET_STATE(curthread, PS_SIGSUSPEND);
73 /* Wait for a signal: */
74 _thr_sched_switch_unlocked(curthread);
76 curthread->check_pending = 1;
77 THR_UNLOCK_SWITCH(curthread);
78 /* check pending signal I can handle: */
79 _thr_sig_check_pending(curthread);
81 if ((curthread->cancelflags & THR_CANCELLING) != 0)
82 curthread->oldsigmask = NULL;
84 THR_ASSERT(curthread->oldsigmask == NULL,
85 "oldsigmask is not cleared");
88 /* Always return an interrupted error: */
91 /* Return an invalid argument error: */
95 /* Return the completion status: */
100 __sigsuspend(const sigset_t * set)
102 struct pthread *curthread = _get_curthread();
105 _thr_cancel_enter(curthread);
106 ret = _sigsuspend(set);
107 _thr_cancel_leave(curthread, 1);