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
|
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include <time.h>
#include <errno.h>
/* Initialization code for SDL */
#include "SDL.h"
#include "haptic/SDL_haptic_c.h"
#include "joystick/SDL_joystick_c.h"
/* The initialized subsystems */
static Uint32 SDL_initialized = 0;
int
SDL_InitSubSystem(Uint32 flags)
{
#ifndef SDL_JOYSTICK_DISABLED
/* Initialize the joystick subsystem */
if ((flags & SDL_INIT_JOYSTICK) && !(SDL_initialized & SDL_INIT_JOYSTICK)) {
if (SDL_JoystickInit() < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_JOYSTICK;
}
/* Initialize the haptic subsystem */
if ((flags & SDL_INIT_HAPTIC) && !(SDL_initialized & SDL_INIT_HAPTIC)) {
if (SDL_HapticInit() < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_HAPTIC;
}
#endif
#ifndef SDL_AUDIO_DISABLED
/* Initialize the audio subsystem */
if ((flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO)) {
if (SDL_AudioInit(NULL) < 0) {
return (-1);
}
SDL_initialized |= SDL_INIT_AUDIO;
}
#endif
return (0);
}
int
SDL_Init(Uint32 flags)
{
/* Clear the error message */
SDL_ClearError();
/* Initialize the desired subsystems */
if (SDL_InitSubSystem(flags) < 0) {
return (-1);
}
return (0);
}
void
SDL_QuitSubSystem(Uint32 flags)
{
#ifndef SDL_JOYSTICK_DISABLED
/* Shut down requested initialized subsystems */
if ((flags & SDL_initialized & SDL_INIT_JOYSTICK)) {
SDL_JoystickQuit();
SDL_initialized &= ~SDL_INIT_JOYSTICK;
}
if ((flags & SDL_initialized & SDL_INIT_HAPTIC)) {
SDL_HapticQuit();
SDL_initialized &= ~SDL_INIT_HAPTIC;
}
#endif
#ifndef SDL_AUDIO_DISABLED
if ((flags & SDL_initialized & SDL_INIT_AUDIO)) {
SDL_AudioQuit();
SDL_initialized &= ~SDL_INIT_AUDIO;
}
#endif
}
Uint32
SDL_WasInit(Uint32 flags)
{
if (!flags) {
flags = SDL_INIT_EVERYTHING;
}
return (SDL_initialized & flags);
}
void
SDL_Quit(void)
{
/* Quit all subsystems */
SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
}
void
SDL_Delay(Uint32 ms)
{
int was_error;
#if HAVE_NANOSLEEP
struct timespec elapsed, tv;
#else
struct timeval tv;
Uint32 then, now, elapsed;
#endif
/* Set the timeout interval */
#if HAVE_NANOSLEEP
elapsed.tv_sec = ms / 1000;
elapsed.tv_nsec = (ms % 1000) * 1000000;
#else
then = SDL_GetTicks();
#endif
do {
errno = 0;
#if HAVE_NANOSLEEP
tv.tv_sec = elapsed.tv_sec;
tv.tv_nsec = elapsed.tv_nsec;
was_error = nanosleep(&tv, &elapsed);
#else
/* Calculate the time interval left (in case of interrupt) */
now = SDL_GetTicks();
elapsed = (now - then);
then = now;
if (elapsed >= ms) {
break;
}
ms -= elapsed;
tv.tv_sec = ms / 1000;
tv.tv_usec = (ms % 1000) * 1000;
was_error = select(0, NULL, NULL, NULL, &tv);
#endif /* HAVE_NANOSLEEP */
} while (was_error && (errno == EINTR));
}
|
