projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 28f540f4 | 1 | /* __sig_atomic_t, __sigset_t, and related definitions. SVR4 version. |
| 54d79e99 UD |
2 | Copyright (C) 1994, 1995, 1996 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 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 not, | |
| 17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 18 | Boston, MA 02111-1307, USA. */ | |
| 28f540f4 RM |
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 struct | |
| 27 | { | |
| 28 | unsigned long int __sigbits[4]; | |
| 29 | } __sigset_t; | |
| 30 | ||
| 31 | #endif /* ! _SIGSET_H_types */ | |
| 32 | ||
| 33 | /* We only want to define these functions if <signal.h> was actually | |
| 34 | included; otherwise we were included just to define the types. Since we | |
| 35 | are namespace-clean, it wouldn't hurt to define extra macros. But | |
| 36 | trouble can be caused by functions being defined (e.g., any global | |
| 37 | register vars declared later will cause compilation errors). */ | |
| 38 | ||
| 39 | #if !defined (_SIGSET_H_fns) && defined (_SIGNAL_H) | |
| 40 | #define _SIGSET_H_fns 1 | |
| 41 | ||
| 42 | /* Return a mask that includes SIG only. */ | |
| 43 | #define __sigmask(sig) (1 << ((sig) - 1)) | |
| 44 | ||
| 45 | ||
| 46 | /* It's easier to assume 8-bit bytes than to get CHAR_BIT. */ | |
| 47 | #define __NSSBITS (sizeof (__sigset_t) * 8) | |
| 48 | #define __SSELT(s) ((s) / __NSSBITS) | |
| 49 | #define __SSMASK(s) (1 << ((s) % __NSSBITS)) | |
| 50 | ||
| 51 | #ifndef _EXTERN_INLINE | |
| 52 | #define _EXTERN_INLINE extern __inline | |
| 53 | #endif | |
| 54 | ||
| 55 | _EXTERN_INLINE int | |
| 56 | __sigemptyset (__sigset_t *__set) | |
| 57 | { | |
| 58 | __set->__sigbits[0] = __set->__sigbits[1] = | |
| 59 | __set->__sigbits[2] = __set->__sigbits[3] = 0L; | |
| 60 | return 0; | |
| 61 | } | |
| 62 | ||
| 63 | _EXTERN_INLINE int | |
| 64 | __sigfillset (__sigset_t *__set) | |
| 65 | { | |
| 66 | /* SVR4 has a system call for `sigfillset' (!), and it only sets the bits | |
| 67 | for signals [1,31]. Setting bits for unimplemented signals seems | |
| 68 | harmless (and we will find out if it really is). */ | |
| 69 | __set->__sigbits[0] = __set->__sigbits[1] = | |
| e627021e | 70 | __set->__sigbits[2] = __set->__sigbits[3] = ~0L; |
| 28f540f4 RM |
71 | return 0; |
| 72 | } | |
| 73 | ||
| 74 | _EXTERN_INLINE int | |
| 75 | __sigaddset (__sigset_t *__set, int __sig) | |
| 76 | { | |
| 77 | __set->__sigbits[__SSELT (__sig)] |= __SSMASK (__sig); | |
| 78 | return 0; | |
| 79 | } | |
| 80 | ||
| 81 | _EXTERN_INLINE int | |
| 82 | __sigdelset (__sigset_t *__set, int __sig) | |
| 83 | { | |
| 84 | __set->__sigbits[__SSELT (__sig)] &= ~__SSMASK (__sig); | |
| 85 | return 0; | |
| 86 | } | |
| 87 | ||
| 88 | _EXTERN_INLINE int | |
| 89 | __sigismember (__const __sigset_t *__set, int __sig) | |
| 90 | { | |
| 91 | if (__set->__sigbits[__SSELT (__sig)] & __SSMASK (__sig)) | |
| 92 | return 1; | |
| 93 | return 0; | |
| 94 | } | |
| 95 | ||
| 96 | #endif /* ! _SIGSET_H_fns */ |