diff options
Diffstat (limited to 'apps/plugins/sdl/src/timer/mint/SDL_systimer.c')
-rw-r--r-- | apps/plugins/sdl/src/timer/mint/SDL_systimer.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/timer/mint/SDL_systimer.c b/apps/plugins/sdl/src/timer/mint/SDL_systimer.c new file mode 100644 index 0000000000..01e7a410c1 --- /dev/null +++ b/apps/plugins/sdl/src/timer/mint/SDL_systimer.c | |||
@@ -0,0 +1,149 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 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 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | #ifdef SDL_TIMER_MINT | ||
25 | |||
26 | /* | ||
27 | * TOS/MiNT timer driver | ||
28 | * based on vbl vector | ||
29 | * | ||
30 | * Patrice Mandin | ||
31 | */ | ||
32 | |||
33 | #include <stdio.h> | ||
34 | #include <sys/time.h> | ||
35 | #include <signal.h> | ||
36 | #include <unistd.h> | ||
37 | #include <string.h> | ||
38 | #include <errno.h> | ||
39 | |||
40 | #include <mint/cookie.h> | ||
41 | #include <mint/sysvars.h> | ||
42 | #include <mint/osbind.h> | ||
43 | #include <mint/mintbind.h> | ||
44 | |||
45 | #include "SDL_timer.h" | ||
46 | #include "../SDL_timer_c.h" | ||
47 | #include "SDL_thread.h" | ||
48 | |||
49 | #include "../../video/ataricommon/SDL_atarisuper.h" | ||
50 | |||
51 | #include "SDL_vbltimer_s.h" | ||
52 | |||
53 | /* from audio/mint */ | ||
54 | void SDL_MintAudio_CheckFpu(void); | ||
55 | |||
56 | /* The first ticks value of the application */ | ||
57 | static Uint32 start; | ||
58 | static SDL_bool read_hz200_from_vbl = SDL_FALSE; | ||
59 | static int mint_present; /* can we use Syield() ? */ | ||
60 | |||
61 | void SDL_StartTicks(void) | ||
62 | { | ||
63 | void *old_stack; | ||
64 | long dummy; | ||
65 | |||
66 | /* Set first ticks value */ | ||
67 | old_stack = (void *)Super(0); | ||
68 | start = *((volatile long *)_hz_200); | ||
69 | SuperToUser(old_stack); | ||
70 | |||
71 | start *= 5; /* One _hz_200 tic is 5ms */ | ||
72 | |||
73 | mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND); | ||
74 | } | ||
75 | |||
76 | Uint32 SDL_GetTicks (void) | ||
77 | { | ||
78 | Uint32 now = start; | ||
79 | |||
80 | if (read_hz200_from_vbl) { | ||
81 | now = SDL_Atari_hz200; | ||
82 | } else { | ||
83 | void *old_stack = (void *)Super(0); | ||
84 | now = *((volatile long *)_hz_200); | ||
85 | SuperToUser(old_stack); | ||
86 | } | ||
87 | |||
88 | return((now*5)-start); | ||
89 | } | ||
90 | |||
91 | void SDL_Delay (Uint32 ms) | ||
92 | { | ||
93 | Uint32 now; | ||
94 | |||
95 | now = SDL_GetTicks(); | ||
96 | while ((SDL_GetTicks()-now)<ms){ | ||
97 | if (mint_present) { | ||
98 | Syield(); | ||
99 | } | ||
100 | } | ||
101 | } | ||
102 | |||
103 | /* Data to handle a single periodic alarm */ | ||
104 | static SDL_bool timer_installed=SDL_FALSE; | ||
105 | |||
106 | /* This is only called if the event thread is not running */ | ||
107 | int SDL_SYS_TimerInit(void) | ||
108 | { | ||
109 | void *old_stack; | ||
110 | |||
111 | SDL_MintAudio_CheckFpu(); | ||
112 | |||
113 | /* Install RunTimer in vbl vector */ | ||
114 | old_stack = (void *)Super(0); | ||
115 | timer_installed = !SDL_AtariVblInstall(SDL_ThreadedTimerCheck); | ||
116 | SuperToUser(old_stack); | ||
117 | |||
118 | if (!timer_installed) { | ||
119 | return(-1); | ||
120 | } | ||
121 | |||
122 | read_hz200_from_vbl = SDL_TRUE; | ||
123 | return(SDL_SetTimerThreaded(0)); | ||
124 | } | ||
125 | |||
126 | void SDL_SYS_TimerQuit(void) | ||
127 | { | ||
128 | /* Uninstall RunTimer vbl vector */ | ||
129 | if (timer_installed) { | ||
130 | void *old_stack = (void *)Super(0); | ||
131 | SDL_AtariVblUninstall(SDL_ThreadedTimerCheck); | ||
132 | SuperToUser(old_stack); | ||
133 | timer_installed = SDL_FALSE; | ||
134 | } | ||
135 | read_hz200_from_vbl = SDL_FALSE; | ||
136 | } | ||
137 | |||
138 | int SDL_SYS_StartTimer(void) | ||
139 | { | ||
140 | SDL_SetError("Internal logic error: MiNT uses vbl timer"); | ||
141 | return(-1); | ||
142 | } | ||
143 | |||
144 | void SDL_SYS_StopTimer(void) | ||
145 | { | ||
146 | return; | ||
147 | } | ||
148 | |||
149 | #endif /* SDL_TIMER_MINT */ | ||