git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 28f540f4 | 1 | /* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version. |
| b0d20a87 | 2 | Copyright (C) 1991, 1992, 1994, 1996 Free Software Foundation, Inc. |
| 28f540f4 RM |
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 Library General Public License as | |
| 7 | published by the Free Software Foundation; either version 2 of the | |
| 8 | 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 | Library General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Library General Public | |
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| b0d20a87 | 17 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
| 28f540f4 RM |
18 | Cambridge, MA 02139, USA. */ |
| 19 | ||
| 20 | #ifndef _SIGSET_H_types | |
| 21 | #define _SIGSET_H_types 1 | |
| 22 | ||
| 23 | typedef int __sig_atomic_t; | |
| 24 | ||
| 25 | /* A `sigset_t' has a bit for each signal. */ | |
| 26 | typedef unsigned long int __sigset_t; | |
| 27 | ||
| 28 | #endif | |
| 29 | ||
| 30 | ||
| 31 | /* We only want to define these functions if <signal.h> was actually | |
| 32 | included; otherwise we were included just to define the types. Since we | |
| 33 | are namespace-clean, it wouldn't hurt to define extra macros. But | |
| 34 | trouble can be caused by functions being defined (e.g., any global | |
| 35 | register vars declared later will cause compilation errors). */ | |
| 36 | ||
| 37 | #if !defined (_SIGSET_H_fns) && defined (_SIGNAL_H) | |
| 38 | #define _SIGSET_H_fns 1 | |
| 39 | ||
| 40 | /* Return a mask that includes SIG only. The cast to `sigset_t' avoids | |
| 41 | overflow if `sigset_t' is wider than `int'. */ | |
| 42 | #define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1)) | |
| 43 | ||
| 44 | #define __sigemptyset(set) ((*(set) = (__sigset_t) 0), 0) | |
| 45 | #define __sigfillset(set) ((*(set) = ~(__sigset_t) 0), 0) | |
| 46 | ||
| 47 | /* These functions must check for a bogus signal number. We detect it by a | |
| 48 | zero sigmask, since a number too low or too high will have shifted the 1 | |
| 49 | off the high end of the mask. If we find an error, we punt to a random | |
| 50 | call we know fails with EINVAL (kludge city!), so as to avoid referring | |
| 51 | to `errno' in this file (sigh). */ | |
| 52 | ||
| 26761c28 UD |
53 | extern int __sigismember (__const __sigset_t *, int); |
| 54 | extern int __sigaddset (__sigset_t *, int); | |
| 55 | extern int __sigdelset (__sigset_t *, int); | |
| 510ca033 | 56 | |
| 28f540f4 RM |
57 | #ifndef _EXTERN_INLINE |
| 58 | #define _EXTERN_INLINE extern __inline | |
| 59 | #endif | |
| 60 | #define __SIGSETFN(NAME, BODY, CONST) \ | |
| 61 | _EXTERN_INLINE int \ | |
| 62 | __##NAME (CONST __sigset_t *__set, int __sig) \ | |
| 63 | { \ | |
| 67a3a8ac | 64 | if (__sig < 1 || __sig > (int) sizeof (__sigset_t) * 8) \ |
| 28f540f4 RM |
65 | { \ |
| 66 | extern int raise (int); \ | |
| 67 | return raise (-1); \ | |
| 68 | } \ | |
| 69 | else \ | |
| 70 | { \ | |
| 71 | __sigset_t __mask = __sigmask (__sig); \ | |
| 72 | return BODY; \ | |
| 73 | } \ | |
| 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 | ||
| 82 | ||
| 83 | #endif /* ! _SIGSET_H_fns. */ |