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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by John Birrell.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/signalvar.h>
39 #include "thr_private.h"
41 __weak_reference(__sigsuspend, sigsuspend);
44 _sigsuspend(const sigset_t *set)
46 struct pthread *curthread = _get_curthread();
47 sigset_t oldmask, newmask, tempset;
50 if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
51 return (__sys_sigsuspend(set));
53 /* Check if a new signal set was provided by the caller: */
56 SIG_CANTMASK(newmask);
57 THR_LOCK_SWITCH(curthread);
59 /* Save current sigmask: */
60 oldmask = curthread->sigmask;
61 curthread->oldsigmask = &oldmask;
63 /* Change the caller's mask: */
64 curthread->sigmask = newmask;
65 tempset = curthread->sigpend;
66 SIGSETNAND(tempset, newmask);
67 if (SIGISEMPTY(tempset)) {
68 THR_SET_STATE(curthread, PS_SIGSUSPEND);
69 /* Wait for a signal: */
70 _thr_sched_switch_unlocked(curthread);
72 curthread->check_pending = 1;
73 THR_UNLOCK_SWITCH(curthread);
74 /* check pending signal I can handle: */
75 _thr_sig_check_pending(curthread);
77 THR_ASSERT(curthread->oldsigmask == NULL,
78 "oldsigmask is not cleared");
79 /* Always return an interrupted error: */
82 /* Return an invalid argument error: */
86 /* Return the completion status: */
91 __sigsuspend(const sigset_t * set)
93 struct pthread *curthread = _get_curthread();
96 _thr_cancel_enter(curthread);
97 ret = _sigsuspend(set);
98 _thr_cancel_leave(curthread, 1);