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. 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
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/signalvar.h>
37 #include "pthread_private.h"
39 __weak_reference(_pthread_sigmask, pthread_sigmask);
42 _pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
44 struct pthread *curthread = _get_curthread();
48 /* Check if the existing signal process mask is to be returned: */
50 /* Return the current mask: */
51 *oset = curthread->sigmask;
53 /* Check if a new signal set was provided by the caller: */
55 /* Process according to what to do: */
59 /* Add signals to the existing mask: */
60 SIGSETOR(curthread->sigmask, *set);
63 /* Unblock signals: */
65 /* Clear signals from the existing mask: */
66 SIGSETNAND(curthread->sigmask, *set);
69 /* Set the signal process mask: */
71 /* Set the new mask: */
72 curthread->sigmask = *set;
75 /* Trap invalid actions: */
77 /* Return an invalid argument: */
83 /* Increment the sequence number: */
84 curthread->sigmask_seqno++;
87 * Check if there are pending signals for the running
88 * thread or process that aren't blocked:
90 sigset = curthread->sigpend;
91 SIGSETOR(sigset, _process_sigpending);
92 SIGSETNAND(sigset, curthread->sigmask);
93 if (SIGNOTEMPTY(sigset))
95 * Call the kernel scheduler which will safely
96 * install a signal frame for the running thread:
98 _thread_kern_sched_sig();
101 /* Return the completion status: */