1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/* __sig_atomic_t, __sigset_t, and related definitions. Linux version.
Copyright (C) 1991, 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SIGSET_H_types
#define _SIGSET_H_types 1
typedef int __sig_atomic_t;
/* A `sigset_t' has a bit for each signal. Having 32 * 4 * 8 bits gives
us up to 1024 signals. */
#define _SIGSET_NWORDS 32
typedef struct
{
unsigned int __val[_SIGSET_NWORDS];
} __sigset_t;
#endif
/* We only want to define these functions if <signal.h> was actually
included; otherwise we were included just to define the types. Since we
are namespace-clean, it wouldn't hurt to define extra macros. But
trouble can be caused by functions being defined (e.g., any global
register vars declared later will cause compilation errors). */
#if !defined (_SIGSET_H_fns) && defined (_SIGNAL_H)
#define _SIGSET_H_fns 1
#ifndef _EXTERN_INLINE
#define _EXTERN_INLINE extern __inline
#endif
/* Return a mask that includes the bit for SIG only. */
#define __sigmask(sig) (((unsigned int) 1) << (((sig) - 1) \
% (8 * sizeof (unsigned int))))
/* Return the word index for SIG. */
#define __sigword(sig) (((sig) - 1) / (8 * sizeof (unsigned int)))
#if defined __GNUC__ && __GNUC__ >= 2
#define __sigemptyset(set) \
(__extension__ ({ unsigned int __cnt; \
for (__cnt = 0; __cnt < _SIGSET_NWORDS; ++__cnt) \
(set)->__val[__cnt] = 0; 0; }))
#define __sigfillset(set) \
(__extension__ ({ unsigned int __cnt; \
for (__cnt = 0; __cnt < _SIGSET_NWORDS; ++__cnt) \
(set)->__val[__cnt] = ~0; 0; }))
#endif
/* These functions needn't check for a bogus signal number -- error
checking is done in the non __ versions. */
extern int __sigismember (__const __sigset_t *, int);
extern int __sigaddset (__sigset_t *, int);
extern int __sigdelset (__sigset_t *, int);
#define __SIGSETFN(NAME, BODY, CONST) \
_EXTERN_INLINE int \
NAME (CONST __sigset_t *__set, int __sig) \
{ \
unsigned int __mask = __sigmask (__sig); \
unsigned int __word = __sigword (__sig); \
return BODY; \
}
__SIGSETFN (__sigismember, (__set->__val[__word] & __mask) ? 1 : 0, __const)
__SIGSETFN (__sigaddset, ((__set->__val[__word] |= __mask), 0), )
__SIGSETFN (__sigdelset, ((__set->__val[__word] &= ~__mask), 0), )
#undef __SIGSETFN
#endif /* ! _SIGSET_H_fns. */
|
