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| 1 | /* Special use of signals internally. Stub version. |
|---|---|
| 2 | Copyright (C) 2014-2022 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 |
| 32 | __is_internal_signal (int sig) |
| 33 | { |
| 34 | return false; |
| 35 | } |
| 36 | |
| 37 | static inline void |
| 38 | __clear_internal_signals (sigset_t *set) |
| 39 | { |
| 40 | } |
| 41 | |
| 42 | static inline void |
| 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 |
| 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 |
| 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 |
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