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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright (c) 2009 Marko Kreen
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/** @file
* Signals compat.
*
* general
* - sigaction() -> signal()
*
* win32:
* - SIGALRM, alarm(), signal(SIGALRM), sigaction(SIGALRM)
* - kill(pid, 0)
*/
#ifndef _USUAL_SIGNAL_H_
#define _USUAL_SIGNAL_H_
#include <usual/base.h>
#include <signal.h>
/*
* Compat sigval, detect based on siginfo_t.si_code.
*/
#if !defined(SI_QUEUE) && !defined(HAVE_SIGQUEUE)
union sigval {
int sival_int;
void *sival_ptr;
};
#endif
/*
* Compat sigevent
*/
#ifndef SIGEV_NONE
#define SIGEV_NONE 0
#define SIGEV_SIGNAL 1
#define SIGEV_THREAD 2
struct sigevent {
int sigev_notify;
int sigev_signo;
union sigval sigev_value;
void (*sigev_notify_function)(union sigval);
};
#endif
/*
* Compat sigaction()
*/
#ifndef HAVE_SIGACTION
#define SA_SIGINFO 1
#define SA_RESTART 2
typedef struct siginfo_t siginfo_t;
struct sigaction {
union {
void (*sa_handler)(int);
void (*sa_sigaction)(int, siginfo_t *, void *);
};
int sa_flags;
int sa_mask;
};
#define sigemptyset(s)
#define sigfillset(s)
#define sigaddset(s, sig)
#define sigdelset(s, sig)
#define sigaction(a,b,c) compat_sigaction(a,b,c)
int sigaction(int sig, const struct sigaction *sa, struct sigaction *old);
#endif
/*
* win32 compat:
* kill(), alarm, SIGALRM
*/
#ifdef WIN32
#define SIGALRM 1023
#define SIGBUS 1022
unsigned alarm(unsigned);
int kill(int pid, int sig);
typedef void (*_sighandler_t)(int);
static inline _sighandler_t wrap_signal(int sig, _sighandler_t func)
{
/* sigaction has custom handling for SIGALRM */
if (sig == SIGALRM) {
struct sigaction sa, oldsa;
sa.sa_handler = func;
sa.sa_flags = sa.sa_mask = 0;
sigaction(SIGALRM, &sa, &oldsa);
return oldsa.sa_handler;
} else if (sig == SIGBUS) {
return NULL;
}
return signal(sig, func);
}
#define signal(a,b) wrap_signal(a,b)
#endif
#endif
|
