SDL_quit.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
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
13
Lesser General Public License for more details.
15
16
17
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
18
19
Sam Lantinga
20
slouken@libsdl.org
21
22
23
24
*/
/* General quit handling code for SDL */
25
#include "SDL_config.h"
27
#ifdef HAVE_SIGNAL_H
28
29
30
31
32
33
34
#include <signal.h>
#endif
#include "SDL_events.h"
#include "SDL_events_c.h"
35
#ifdef HAVE_SIGNAL_H
36
37
38
39
40
41
42
43
static void SDL_HandleSIG(int sig)
{
/* Reset the signal handler */
signal(sig, SDL_HandleSIG);
/* Signal a quit interrupt */
SDL_PrivateQuit();
}
44
#endif /* HAVE_SIGNAL_H */
45
46
47
48
/* Public functions */
int SDL_QuitInit(void)
{
49
#ifdef HAVE_SIGNAL_H
50
51
52
void (*ohandler)(int);
/* Both SIGINT and SIGTERM are translated into quit interrupts */
53
ohandler = signal(SIGINT, SDL_HandleSIG);
54
55
56
57
58
if ( ohandler != SIG_DFL )
signal(SIGINT, ohandler);
ohandler = signal(SIGTERM, SDL_HandleSIG);
if ( ohandler != SIG_DFL )
signal(SIGTERM, ohandler);
59
#endif /* HAVE_SIGNAL_H */
60
61
62
63
/* That's it! */
return(0);
}
64
65
void SDL_QuitQuit(void)
{
66
#ifdef HAVE_SIGNAL_H
67
68
69
70
71
72
73
74
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);
75
#endif /* HAVE_SIGNAL_H */
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
/* 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);
}