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 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_AMIGA
25
26 #include <stdio.h>
27 #include <time.h>
28 #include <signal.h>
29 #include <unistd.h>
30 #include <string.h>
31 #include <errno.h>
32 #include <exec/types.h>
33 #ifdef __SASC
34 #include <proto/dos.h>
35 #include <clib/graphics_protos.h>
36 #include <pragmas/graphics.h>
37 #include <clib/exec_protos.h>
38 #include <pragmas/exec.h>
39 #elif defined(STORMC4_WOS)
40 #include <proto/dos.h>
41 #include <proto/exec.h>
42 #include <proto/graphics.h>
43 #else
44 #include <inline/dos.h>
45 #include <inline/exec.h>
46 #include <inline/graphics.h>
47 #endif
48 #include "mydebug.h"
49
50 extern struct DosLibrary *DOSBase;
51 extern struct ExecBase *SysBase;
52 static struct GfxBase *GfxBase;
53
54 #include "SDL_timer.h"
55 #include "../SDL_timer_c.h"
56
57 /* The first ticks value of the application */
58
59 #if !defined(__PPC__) || defined(STORMC4_WOS) || defined(MORPHOS)
60 static clock_t start;
61
SDL_StartTicks(void)62 void SDL_StartTicks(void)
63 {
64 /* Set first ticks value */
65 start=clock();
66 }
67
SDL_GetTicks(void)68 Uint32 SDL_GetTicks (void)
69 {
70 clock_t ticks;
71
72 ticks=clock()-start;
73
74 #ifdef __SASC
75 // CLOCKS_PER_SEC == 1000 !
76
77 return(ticks);
78 #else
79 // CLOCKS_PER_SEC != 1000 !
80
81 return ticks*(1000/CLOCKS_PER_SEC);
82 #endif
83 }
84
SDL_Delay(Uint32 ms)85 void SDL_Delay (Uint32 ms)
86 {
87 // Do a busy wait if time is less than 50ms
88
89 if(ms<50)
90 {
91 clock_t to_wait=clock();
92
93 #ifndef __SASC
94 ms*=(CLOCKS_PER_SEC/1000);
95 #endif
96 to_wait+=ms;
97
98 while(clock()<to_wait);
99 }
100 else
101 {
102 Delay(ms/20);
103 }
104 }
105
106 #else
107
108 ULONG MY_CLOCKS_PER_SEC;
109
110 void PPC_TimerInit(void);
111 APTR MyTimer;
112
113 ULONG start[2];
114
SDL_StartTicks(void)115 void SDL_StartTicks(void)
116 {
117 /* Set first ticks value */
118 if(!MyTimer)
119 PPC_TimerInit();
120
121 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,start);
122 start[1]>>=10;
123 start[1]|=((result[0]&0x3ff)<<22);
124 start[0]>>=10;
125 }
126
SDL_GetTicks(void)127 Uint32 SDL_GetTicks (void)
128 {
129 ULONG result[2];
130 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
131
132 // PPCAsr64p(result,10);
133 // Non va, la emulo:
134
135 result[1]>>=10;
136 result[1]|=((result[0]&0x3ff)<<22);
137
138 // Non mi interessa piu' result[0]
139
140 return result[1]*1000/MY_CLOCKS_PER_SEC;
141 }
142
SDL_Delay(Uint32 ms)143 void SDL_Delay (Uint32 ms)
144 {
145 // Do a busy wait if time is less than 50ms
146
147 if(ms<50)
148 {
149 ULONG to_wait[2],actual[2];
150 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
151 actual[1]=0;
152 to_wait[1]+=ms*1000/MY_CLOCKS_PER_SEC;
153
154 while(actual[1]<to_wait[1])
155 {
156 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,actual);
157 }
158 }
159 else
160 {
161 Delay(ms/50);
162 }
163 }
164
PPC_TimerInit(void)165 void PPC_TimerInit(void)
166 {
167 struct TagItem tags[]=
168 {
169 PPCTIMERTAG_CPU,TRUE,
170 TAG_DONE,0
171 };
172
173
174 if(MyTimer=PPCCreateTimerObject(tags))
175 {
176 ULONG result[2];
177
178 PPCGetTimerObject(MyTimer,PPCTIMERTAG_TICKSPERSEC,result);
179 D(bug("Timer inizializzato, TPS: %lu - %lu\n",result[0],result[1]));
180 // PPCAsr64p(result,10);
181 result[1]>>=10;
182 result[1]|=((result[0]&0x3ff)<<22);
183 result[0]>>=10;
184
185 D(bug("Shiftato TPS: %lu - %lu\n",result[0],result[1]));
186 MY_CLOCKS_PER_SEC=result[1];
187
188 PPCGetTimerObject(MyTimer,PPCTIMERTAG_CURRENTTICKS,result);
189
190 D(bug("Current ticks: %lu - %lu\n",result[0],result[1]));
191 result[1]>>=10;
192 result[1]|=((result[0]&0x3ff)<<22);
193 result[0]>>=10;
194 // PPCAsr64p(result,10);
195 D(bug("Shiftato: %lu - %lu\n",result[0],result[1]));
196 }
197 else
198 {
199 D(bug("Errore nell'inizializzazione del timer!\n"));
200 }
201 }
202
203 #endif
204
205 #include "SDL_thread.h"
206
207 /* Data to handle a single periodic alarm */
208 static int timer_alive = 0;
209 static SDL_Thread *timer_thread = NULL;
210
RunTimer(void * unused)211 static int RunTimer(void *unused)
212 {
213 D(bug("SYSTimer: Entering RunTimer loop..."));
214
215 if(GfxBase==NULL)
216 GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",37);
217
218 while ( timer_alive ) {
219 if ( SDL_timer_running ) {
220 SDL_ThreadedTimerCheck();
221 }
222 if(GfxBase)
223 WaitTOF(); // Check the timer every fifth of seconds. Was SDL_Delay(1)->BusyWait!
224 else
225 Delay(1);
226 }
227 D(bug("SYSTimer: EXITING RunTimer loop..."));
228 return(0);
229 }
230
231 /* This is only called if the event thread is not running */
SDL_SYS_TimerInit(void)232 int SDL_SYS_TimerInit(void)
233 {
234 D(bug("Creating thread for the timer (NOITIMER)...\n"));
235
236 timer_alive = 1;
237 timer_thread = SDL_CreateThread(RunTimer, NULL);
238 if ( timer_thread == NULL )
239 {
240 D(bug("Creazione del thread fallita...\n"));
241
242 return(-1);
243 }
244 return(SDL_SetTimerThreaded(1));
245 }
246
SDL_SYS_TimerQuit(void)247 void SDL_SYS_TimerQuit(void)
248 {
249 timer_alive = 0;
250 if ( timer_thread ) {
251 SDL_WaitThread(timer_thread, NULL);
252 timer_thread = NULL;
253 }
254 }
255
SDL_SYS_StartTimer(void)256 int SDL_SYS_StartTimer(void)
257 {
258 SDL_SetError("Internal logic error: AmigaOS uses threaded timer");
259 return(-1);
260 }
261
SDL_SYS_StopTimer(void)262 void SDL_SYS_StopTimer(void)
263 {
264 return;
265 }
266
267 #endif /* SDL_TIMER_AMIGA */
268