Fix ldconfig to handle symlinks in chroot correctly.
[glibc.git] / bits / sigset.h
blobd6f9311e710be859ba43c414da879938d61b46dd
1 /* __sig_atomic_t, __sigset_t, and related definitions. Generic/BSD version.
2 Copyright (C) 1991, 1992, 1994, 1996, 1997, 2007
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #ifndef _SIGSET_H_types
22 #define _SIGSET_H_types 1
24 typedef int __sig_atomic_t;
26 /* A `sigset_t' has a bit for each signal. */
27 typedef unsigned long int __sigset_t;
29 #endif
32 /* We only want to define these functions if <signal.h> was actually
33 included; otherwise we were included just to define the types. Since we
34 are namespace-clean, it wouldn't hurt to define extra macros. But
35 trouble can be caused by functions being defined (e.g., any global
36 register vars declared later will cause compilation errors). */
38 #if !defined _SIGSET_H_fns && defined _SIGNAL_H
39 #define _SIGSET_H_fns 1
41 #ifndef _EXTERN_INLINE
42 # define _EXTERN_INLINE __extern_inline
43 #endif
45 /* Return a mask that includes SIG only. The cast to `sigset_t' avoids
46 overflow if `sigset_t' is wider than `int'. */
47 #define __sigmask(sig) (((__sigset_t) 1) << ((sig) - 1))
49 #define __sigemptyset(set) ((*(set) = (__sigset_t) 0), 0)
50 #define __sigfillset(set) ((*(set) = ~(__sigset_t) 0), 0)
52 #ifdef _GNU_SOURCE
53 # define __sigisemptyset(set) (*(set) == (__sigset_t) 0)
54 # define __sigandset(dest, left, right) \
55 ((*(dest) = (*(left) & *(right))), 0)
56 # define __sigorset(dest, left, right) \
57 ((*(dest) = (*(left) | *(right))), 0)
58 #endif
60 /* These functions needn't check for a bogus signal number -- error
61 checking is done in the non __ versions. */
63 extern int __sigismember (__const __sigset_t *, int);
64 extern int __sigaddset (__sigset_t *, int);
65 extern int __sigdelset (__sigset_t *, int);
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; \
76 __SIGSETFN (__sigismember, (*__set & __mask) ? 1 : 0, __const)
77 __SIGSETFN (__sigaddset, ((*__set |= __mask), 0), )
78 __SIGSETFN (__sigdelset, ((*__set &= ~__mask), 0), )
80 # undef __SIGSETFN
81 #endif
84 #endif /* ! _SIGSET_H_fns. */