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
119
120
121
122
123
124
|
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* General quit handling code for SDL */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include "SDL_events.h"
#include "SDL_events_c.h"
#ifdef HAVE_SIGNAL_H
static void SDL_HandleSIG(int sig)
{
/* Reset the signal handler */
signal(sig, SDL_HandleSIG);
/* Signal a quit interrupt */
SDL_PrivateQuit();
}
#endif /* HAVE_SIGNAL_H */
/* Public functions */
int SDL_QuitInit(void)
{
#ifdef HAVE_SIGACTION
struct sigaction action;
sigaction(SIGINT, NULL, &action);
# ifdef HAVE_SA_SIGACTION
if ( action.sa_handler == SIG_DFL && action.sa_sigaction == (void*)SIG_DFL ) {
# else
if ( action.sa_handler == SIG_DFL ) {
# endif
action.sa_handler = SDL_HandleSIG;
sigaction(SIGINT, &action, NULL);
}
sigaction(SIGTERM, NULL, &action);
# ifdef HAVE_SA_SIGACTION
if ( action.sa_handler == SIG_DFL && action.sa_sigaction == (void*)SIG_DFL ) {
# else
if ( action.sa_handler == SIG_DFL ) {
# endif
action.sa_handler = SDL_HandleSIG;
sigaction(SIGTERM, &action, NULL);
}
#elif HAVE_SIGNAL_H
void (*ohandler)(int);
/* Both SIGINT and SIGTERM are translated into quit interrupts */
ohandler = signal(SIGINT, SDL_HandleSIG);
if ( ohandler != SIG_DFL )
signal(SIGINT, ohandler);
ohandler = signal(SIGTERM, SDL_HandleSIG);
if ( ohandler != SIG_DFL )
signal(SIGTERM, ohandler);
#endif /* HAVE_SIGNAL_H */
/* That's it! */
return(0);
}
void SDL_QuitQuit(void)
{
#ifdef HAVE_SIGACTION
struct sigaction action;
sigaction(SIGINT, NULL, &action);
if ( action.sa_handler == SDL_HandleSIG ) {
action.sa_handler = SIG_DFL;
sigaction(SIGINT, &action, NULL);
}
sigaction(SIGTERM, NULL, &action);
if ( action.sa_handler == SDL_HandleSIG ) {
action.sa_handler = SIG_DFL;
sigaction(SIGTERM, &action, NULL);
}
#elif HAVE_SIGNAL_H
void (*ohandler)(int);
ohandler = signal(SIGINT, SIG_DFL);
if ( ohandler != SDL_HandleSIG )
signal(SIGINT, ohandler);
ohandler = signal(SIGTERM, SIG_DFL);
if ( ohandler != SDL_HandleSIG )
signal(SIGTERM, ohandler);
#endif /* HAVE_SIGNAL_H */
}
/* This function returns 1 if it's okay to close the application window */
int SDL_PrivateQuit(void)
{
int posted;
posted = 0;
if ( SDL_ProcessEvents[SDL_QUIT] == SDL_ENABLE ) {
SDL_Event event;
event.type = SDL_QUIT;
if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
posted = 1;
SDL_PushEvent(&event);
}
}
return(posted);
}
|
