| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version. |
| 2 | Copyright (C) 1991-2016 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 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #ifndef _SIGSET_H_types |
| 20 | #define _SIGSET_H_types 1 |
| 21 | |
| 22 | typedef int __sig_atomic_t; |
| 23 | |
| 24 | /* A `sigset_t' has a bit for each signal. */ |
| 25 | typedef unsigned long int __sigset_t; |
| 26 | |
| 27 | #endif |
| 28 | |
| 29 | |
| 30 | /* We only want to define these functions if <signal.h> was actually |
| 31 | included; otherwise we were included just to define the types. Since we |
| 32 | are namespace-clean, it wouldn't hurt to define extra macros. But |
| 33 | trouble can be caused by functions being defined (e.g., any global |
| 34 | register vars declared later will cause compilation errors). */ |
| 35 | |
| 36 | #if !defined _SIGSET_H_fns && defined _SIGNAL_H |
| 37 | #define _SIGSET_H_fns 1 |
| 38 | |
| 39 | #ifndef _EXTERN_INLINE |
| 40 | # define _EXTERN_INLINE __extern_inline |
| 41 | #endif |
| 42 | |
| 43 | /* Return a mask that includes SIG only. The cast to `sigset_t' avoids |
| 44 | overflow if `sigset_t' is wider than `int'. */ |
| 45 | #define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1)) |
| 46 | |
| 47 | #define __sigemptyset(set) \ |
| 48 | (__extension__ ({ *(set) = (__sigset_t) 0; 0; }) |
| 49 | #define __sigfillset(set) \ |
| 50 | (__extension__ ({ *(set) = ~(__sigset_t) 0; 0; })) |
| 51 | |
| 52 | #ifdef _GNU_SOURCE |
| 53 | # define __sigisemptyset(set) (*(set) == (__sigset_t) 0) |
| 54 | # define __sigandset(dest, left, right) \ |
| 55 | (__extension__ ({ *(dest) = *(left) & *(right); 0; })) |
| 56 | # define __sigorset(dest, left, right) \ |
| 57 | (__extension__ ({ *(dest) = *(left) | *(right); 0; })) |
| 58 | #endif |
| 59 | |
| 60 | /* These functions needn't check for a bogus signal number -- error |
| 61 | checking is done in the non __ versions. */ |
| 62 | |
| 63 | extern int __sigismember (const __sigset_t *, int); |
| 64 | extern int __sigaddset (__sigset_t *, int); |
| 65 | extern int __sigdelset (__sigset_t *, int); |
| 66 | |
| 67 | #ifdef __USE_EXTERN_INLINES |
| 68 | # define __SIGSETFN(NAME, BODY, CONST) \ |
| 69 | _EXTERN_INLINE int \ |
| 70 | NAME (CONST __sigset_t *__set, int __sig) \ |
| 71 | { \ |
| 72 | __sigset_t __mask = __sigmask (__sig); \ |
| 73 | return BODY; \ |
| 74 | } |
| 75 | |
| 76 | __SIGSETFN (__sigismember, (*__set & __mask) ? 1 : 0, const) |
| 77 | __SIGSETFN (__sigaddset, ((*__set |= __mask), 0), ) |
| 78 | __SIGSETFN (__sigdelset, ((*__set &= ~__mask), 0), ) |
| 79 | |
| 80 | # undef __SIGSETFN |
| 81 | #endif |
| 82 | |
| 83 | |
| 84 | #endif /* ! _SIGSET_H_fns. */ |