1 /* Special use of signals internally. Stub version.
2 Copyright (C) 2014-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #ifndef __INTERNAL_SIGNALS_H
20 # define __INTERNAL_SIGNALS_H
21
22 #include <signal.h>
23 #include <sigsetops.h>
24 #include <stdbool.h>
25 #include <stddef.h>
26
27 /* How many signal numbers need to be reserved for libpthread's private uses
28 (SIGCANCEL and SIGSETXID). */
29 #define RESERVED_SIGRT 0
30
31 static inline bool
__is_internal_signal(int sig)32 __is_internal_signal (int sig)
33 {
34 return false;
35 }
36
37 static inline void
__clear_internal_signals(sigset_t * set)38 __clear_internal_signals (sigset_t *set)
39 {
40 }
41
42 static inline void
__libc_signal_block_all(sigset_t * set)43 __libc_signal_block_all (sigset_t *set)
44 {
45 sigset_t allset;
46 __sigfillset (&allset);
47 __sigprocmask (SIG_BLOCK, &allset, set);
48 }
49
50 static inline void
__libc_signal_block_app(sigset_t * set)51 __libc_signal_block_app (sigset_t *set)
52 {
53 sigset_t allset;
54 __sigfillset (&allset);
55 __clear_internal_signals (&allset);
56 __sigprocmask (SIG_BLOCK, &allset, set);
57 }
58
59 /* Restore current process signal mask. */
60 static inline void
__libc_signal_restore_set(const sigset_t * set)61 __libc_signal_restore_set (const sigset_t *set)
62 {
63 __sigprocmask (SIG_SETMASK, set, NULL);
64 }
65
66
67 #endif /* __INTERNAL_SIGNALS_H */
68