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
|
/* ****************************************************************************
* signal.h -- Signals.
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'all/core' module in libcarrot, an experimental
* modular libc project.
*
* This file is governed by the CeCILL-C license under French law and abiding
* by the rules of distribution of free software. You can use, modify and or
* redistribute it under the terms of the CeCILL-C license as circulated by
* CEA, CNRS and INRIA at the following URL: http://www.cecill.info
*
* As a counterpart to the access to the source code and rights to copy, modify
* and redistribute granted by the license, users are provided only with a
* limited warranty and the software's author, the holder of the economic
* rights, and the successive licensors have only limited liability.
*
* In this respect, the user's attention is drawn to the risks associated with
* loading, using, modifying and/or developing and reproducing the software by
* the user in light of its specific status of free software, that may mean
* that it is complicated to manipulate, and that also therefore means that it
* is reserved for developers and experienced professionals having in-depth
* computer knowledge. Users are therefore encouraged to load and test the
* software's suitability as regards their requirements in conditions enabling
* the security of their systems and/or data to be ensured and, more generally,
* to use and operate it in the same conditions as regards security.
*
* The fact that you are presently reading this means you have had knowledge of
* the CeCILL-C license and that you accept its terms.
* ************************************************************************* */
#include <cdefs.h>
__BEGIN_NAMESPACE_STD
/* ************************************************************************* */
/* Types and macros */
/* ************************************************************************* */
/* `sig_atomic_t` is the standard type describing an integer that can be
* accessed as an atomic entity, even in the presence of asynchronous
* interrupts. */
typedef volatile int sig_atomic_t;
/* `__sighandler_t` is the type of a signal callback.
* To the functions taking a pointer, instead of sending a real function,
* you can send one of the `SIG_*` macros to make special actions. */
typedef void __sighandler_t _OF((int __sig));
/* `SIG_ERR`: produce an error;
* `SIG_DFL`: do the default action for the signal;
* `SIG_IGN`: ignore the signal. */
#define SIG_ERR ((__sighandler_t*)-1)
#define SIG_DFL ((__sighandler_t*) 0)
#define SIG_IGN ((__sighandler_t*) 1)
/* Here are the different signals you can interact with:
* `SIGABRT`: abnormal termination (e.g. caused by `abort`);
* `SIGFPE`: erroneous arithmetic operation (e.g. zero divide);
* `SIGILL`: illegal instruction;
* `SIGINT`: interrupt;
* `SIGSEGV`: invalid access to storage;
* `SIGTERM`: program termination request. */
#define SIGABRT 1
#define SIGFPE 2
#define SIGILL 3
#define SIGINT 4
#define SIGSEGV 5
#define SIGTERM 6
/* ************************************************************************* */
/* Main functions */
/* ************************************************************************* */
__BEGIN_DECLS
/* Register a signal handler. */
extern __sighandler_t signal _OF((int __sig,
__sighandler_t *__handler)) __THROW;
/* Raise a signal. */
extern int raise _OF((int __sig)) __THROW;
__END_DECLS
__END_NAMESPACE_STD
|