Repository navigation
Expand file tree
/
Copy pathSDL_quit.c
More file actions
202 lines (170 loc) · 5.03 KB
/
Copy pathSDL_quit.c
File metadata and controls
202 lines (170 loc) · 5.03 KB
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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
Simple DirectMedia Layer
Copyright (C) 1997-2026 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../SDL_internal.h"
#include "SDL_hints.h"
/* General quit handling code for SDL */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include "SDL_events.h"
#include "SDL_events_c.h"
#if defined(HAVE_SIGNAL_H) || defined(HAVE_SIGACTION)
#define HAVE_SIGNAL_SUPPORT 1
#endif
#ifdef HAVE_SIGNAL_SUPPORT
static SDL_bool disable_signals = SDL_FALSE;
static SDL_bool send_quit_pending = SDL_FALSE;
#ifdef SDL_BACKGROUNDING_SIGNAL
static SDL_bool send_backgrounding_pending = SDL_FALSE;
#endif
#ifdef SDL_FOREGROUNDING_SIGNAL
static SDL_bool send_foregrounding_pending = SDL_FALSE;
#endif
static void SDL_HandleSIG(int sig)
{
#ifndef HAVE_SIGACTION
/* Reset the signal handler if it was installed with signal() */
(void)signal(sig, SDL_HandleSIG);
#endif
/* Send a quit event next time the event loop pumps. */
/* We can't send it in signal handler; SDL_malloc() might be interrupted! */
if ((sig == SIGINT) || (sig == SIGTERM)) {
send_quit_pending = SDL_TRUE;
}
#ifdef SDL_BACKGROUNDING_SIGNAL
else if (sig == SDL_BACKGROUNDING_SIGNAL) {
send_backgrounding_pending = SDL_TRUE;
}
#endif
#ifdef SDL_FOREGROUNDING_SIGNAL
else if (sig == SDL_FOREGROUNDING_SIGNAL) {
send_foregrounding_pending = SDL_TRUE;
}
#endif
}
static void SDL_EventSignal_Init(const int sig)
{
#ifdef HAVE_SIGACTION
struct sigaction action;
sigaction(sig, NULL, &action);
#ifdef HAVE_SA_SIGACTION
if (action.sa_handler == SIG_DFL && (void (*)(int))action.sa_sigaction == SIG_DFL) {
#else
if (action.sa_handler == SIG_DFL) {
#endif
action.sa_handler = SDL_HandleSIG;
sigaction(sig, &action, NULL);
}
#elif defined(HAVE_SIGNAL_H)
void (*ohandler)(int) = signal(sig, SDL_HandleSIG);
if (ohandler != SIG_DFL) {
signal(sig, ohandler);
}
#endif
}
static void SDL_EventSignal_Quit(const int sig)
{
#ifdef HAVE_SIGACTION
struct sigaction action;
sigaction(sig, NULL, &action);
if (action.sa_handler == SDL_HandleSIG) {
action.sa_handler = SIG_DFL;
sigaction(sig, &action, NULL);
}
#elif defined(HAVE_SIGNAL_H)
void (*ohandler)(int) = signal(sig, SIG_DFL);
if (ohandler != SDL_HandleSIG) {
signal(sig, ohandler);
}
#endif /* HAVE_SIGNAL_H */
}
/* Public functions */
static int SDL_QuitInit_Internal(void)
{
/* Both SIGINT and SIGTERM are translated into quit interrupts */
/* and SDL can be built to simulate iOS/Android semantics with arbitrary signals. */
SDL_EventSignal_Init(SIGINT);
SDL_EventSignal_Init(SIGTERM);
#ifdef SDL_BACKGROUNDING_SIGNAL
SDL_EventSignal_Init(SDL_BACKGROUNDING_SIGNAL);
#endif
#ifdef SDL_FOREGROUNDING_SIGNAL
SDL_EventSignal_Init(SDL_FOREGROUNDING_SIGNAL);
#endif
/* That's it! */
return 0;
}
static void SDL_QuitQuit_Internal(void)
{
SDL_EventSignal_Quit(SIGINT);
SDL_EventSignal_Quit(SIGTERM);
#ifdef SDL_BACKGROUNDING_SIGNAL
SDL_EventSignal_Quit(SDL_BACKGROUNDING_SIGNAL);
#endif
#ifdef SDL_FOREGROUNDING_SIGNAL
SDL_EventSignal_Quit(SDL_FOREGROUNDING_SIGNAL);
#endif
}
#endif
int SDL_QuitInit(void)
{
#ifdef HAVE_SIGNAL_SUPPORT
if (!SDL_GetHintBoolean(SDL_HINT_NO_SIGNAL_HANDLERS, SDL_FALSE)) {
return SDL_QuitInit_Internal();
}
#endif
return 0;
}
void SDL_QuitQuit(void)
{
#ifdef HAVE_SIGNAL_SUPPORT
if (!disable_signals) {
SDL_QuitQuit_Internal();
}
#endif
}
void SDL_SendPendingSignalEvents(void)
{
#ifdef HAVE_SIGNAL_SUPPORT
if (send_quit_pending) {
SDL_SendQuit();
SDL_assert(!send_quit_pending);
}
#ifdef SDL_BACKGROUNDING_SIGNAL
if (send_backgrounding_pending) {
send_backgrounding_pending = SDL_FALSE;
SDL_OnApplicationWillResignActive();
}
#endif
#ifdef SDL_FOREGROUNDING_SIGNAL
if (send_foregrounding_pending) {
send_foregrounding_pending = SDL_FALSE;
SDL_OnApplicationDidBecomeActive();
}
#endif
#endif
}
/* This function returns 1 if it's okay to close the application window */
int SDL_SendQuit(void)
{
#ifdef HAVE_SIGNAL_SUPPORT
send_quit_pending = SDL_FALSE;
#endif
return SDL_SendAppEvent(SDL_QUIT);
}
/* vi: set ts=4 sw=4 expandtab: */