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 1.3 2005/05/30 20:50:53 joerg Exp $
35 #include <sys/param.h>
36 #include <sys/types.h>
37 #include <sys/signalvar.h>
41 #include "pthread_private.h"
44 _pthread_sigmask(int how
, const sigset_t
*set
, sigset_t
*oset
)
46 struct pthread
*curthread
= _get_curthread();
50 /* Check if the existing signal process mask is to be returned: */
52 /* Return the current mask: */
53 *oset
= curthread
->sigmask
;
55 /* Check if a new signal set was provided by the caller: */
57 /* Process according to what to do: */
61 /* Add signals to the existing mask: */
62 SIGSETOR(curthread
->sigmask
, *set
);
65 /* Unblock signals: */
67 /* Clear signals from the existing mask: */
68 SIGSETNAND(curthread
->sigmask
, *set
);
71 /* Set the signal process mask: */
73 /* Set the new mask: */
74 curthread
->sigmask
= *set
;
77 /* Trap invalid actions: */
79 /* Return an invalid argument: */
85 /* Increment the sequence number: */
86 curthread
->sigmask_seqno
++;
89 * Check if there are pending signals for the running
90 * thread or process that aren't blocked:
92 sigset
= curthread
->sigpend
;
93 SIGSETOR(sigset
, _process_sigpending
);
94 SIGSETNAND(sigset
, curthread
->sigmask
);
95 if (SIGNOTEMPTY(sigset
))
97 * Call the kernel scheduler which will safely
98 * install a signal frame for the running thread:
100 _thread_kern_sched_sig();
103 /* Return the completion status: */
107 __strong_reference(_pthread_sigmask
, pthread_sigmask
);