2 * Copyright (c) 1997 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
32 * $FreeBSD: src/lib/libc_r/uthread/uthread_sigmask.c,v 1.5.2.3 2002/10/22 14:44:03 fjoe Exp $
33 * $DragonFly: src/lib/libc_r/uthread/uthread_sigmask.c,v 1.2 2003/06/17 04:26:48 dillon Exp $
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/signalvar.h>
41 #include "pthread_private.h"
43 __weak_reference(_pthread_sigmask, pthread_sigmask);
46 _pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
48 struct pthread *curthread = _get_curthread();
52 /* Check if the existing signal process mask is to be returned: */
54 /* Return the current mask: */
55 *oset = curthread->sigmask;
57 /* Check if a new signal set was provided by the caller: */
59 /* Process according to what to do: */
63 /* Add signals to the existing mask: */
64 SIGSETOR(curthread->sigmask, *set);
67 /* Unblock signals: */
69 /* Clear signals from the existing mask: */
70 SIGSETNAND(curthread->sigmask, *set);
73 /* Set the signal process mask: */
75 /* Set the new mask: */
76 curthread->sigmask = *set;
79 /* Trap invalid actions: */
81 /* Return an invalid argument: */
87 /* Increment the sequence number: */
88 curthread->sigmask_seqno++;
91 * Check if there are pending signals for the running
92 * thread or process that aren't blocked:
94 sigset = curthread->sigpend;
95 SIGSETOR(sigset, _process_sigpending);
96 SIGSETNAND(sigset, curthread->sigmask);
97 if (SIGNOTEMPTY(sigset))
99 * Call the kernel scheduler which will safely
100 * install a signal frame for the running thread:
102 _thread_kern_sched_sig();
105 /* Return the completion status: */