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comparison src/timer/riscos/SDL_systimer.c @ 1895:c121d94672cb

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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 10 Jul 2006 21:04:37 +0000
parents 92947e3a18db
children e27bdcc80744
comparison
equal deleted inserted replaced
1894:c69cee13dd76 1895:c121d94672cb
50 extern void RISCOS_BackgroundTasks(void); 50 extern void RISCOS_BackgroundTasks(void);
51 51
52 /* The first ticks value of the application */ 52 /* The first ticks value of the application */
53 clock_t start; 53 clock_t start;
54 54
55 void SDL_StartTicks(void) 55 void
56 { 56 SDL_StartTicks(void)
57 /* Set first ticks value */ 57 {
58 start = clock(); 58 /* Set first ticks value */
59 } 59 start = clock();
60 60 }
61 Uint32 SDL_GetTicks (void) 61
62 { 62 Uint32
63 clock_t ticks; 63 SDL_GetTicks(void)
64 64 {
65 ticks=clock()-start; 65 clock_t ticks;
66
67 ticks = clock() - start;
66 68
67 69
68 #if CLOCKS_PER_SEC == 1000 70 #if CLOCKS_PER_SEC == 1000
69 71
70 return(ticks); 72 return (ticks);
71 73
72 #elif CLOCKS_PER_SEC == 100 74 #elif CLOCKS_PER_SEC == 100
73 75
74 return (ticks * 10); 76 return (ticks * 10);
75 77
76 #else 78 #else
77 79
78 return ticks*(1000/CLOCKS_PER_SEC); 80 return ticks * (1000 / CLOCKS_PER_SEC);
79 81
80 #endif 82 #endif
81 83
82 } 84 }
83 85
84 void SDL_Delay (Uint32 ms) 86 void
85 { 87 SDL_Delay(Uint32 ms)
86 Uint32 now,then,elapsed; 88 {
89 Uint32 now, then, elapsed;
87 #if !SDL_THREADS_DISABLED 90 #if !SDL_THREADS_DISABLED
88 int is_event_thread; 91 int is_event_thread;
89 if (riscos_using_threads) 92 if (riscos_using_threads) {
90 { 93 is_event_thread = 0;
91 is_event_thread = 0; 94 if (SDL_EventThreadID()) {
92 if (SDL_EventThreadID()) 95 if (SDL_EventThreadID() == SDL_ThreadID())
93 { 96 is_event_thread = 1;
94 if (SDL_EventThreadID() == SDL_ThreadID()) is_event_thread = 1; 97 } else if (SDL_ThreadID() == riscos_main_thread)
95 } else if (SDL_ThreadID() == riscos_main_thread) is_event_thread = 1; 98 is_event_thread = 1;
96 } else is_event_thread = 1; 99 } else
97 #endif 100 is_event_thread = 1;
98 101 #endif
99 /*TODO: Next version of Unixlib may allow us to use usleep here */ 102
100 /* for non event threads */ 103 /*TODO: Next version of Unixlib may allow us to use usleep here */
101 104 /* for non event threads */
102 /* Set the timeout interval - Linux only needs to do this once */ 105
103 then = SDL_GetTicks(); 106 /* Set the timeout interval - Linux only needs to do this once */
104 107 then = SDL_GetTicks();
105 do { 108
106 /* Do background tasks required while sleeping as we are not multithreaded */ 109 do {
110 /* Do background tasks required while sleeping as we are not multithreaded */
107 #if SDL_THREADS_DISABLED 111 #if SDL_THREADS_DISABLED
108 RISCOS_BackgroundTasks(); 112 RISCOS_BackgroundTasks();
109 #else 113 #else
110 /* For threaded build only run background tasks in event thread */ 114 /* For threaded build only run background tasks in event thread */
111 if (is_event_thread) RISCOS_BackgroundTasks(); 115 if (is_event_thread)
112 #endif 116 RISCOS_BackgroundTasks();
113 117 #endif
114 /* Calculate the time interval left (in case of interrupt) */ 118
115 now = SDL_GetTicks(); 119 /* Calculate the time interval left (in case of interrupt) */
116 elapsed = (now-then); 120 now = SDL_GetTicks();
117 then = now; 121 elapsed = (now - then);
118 if ( elapsed >= ms ) { 122 then = now;
119 break; 123 if (elapsed >= ms) {
120 } 124 break;
121 ms -= elapsed; 125 }
126 ms -= elapsed;
122 #if !SDL_THREADS_DISABLED 127 #if !SDL_THREADS_DISABLED
123 /* Need to yield to let other threads have a go */ 128 /* Need to yield to let other threads have a go */
124 if (riscos_using_threads) pthread_yield(); 129 if (riscos_using_threads)
125 #endif 130 pthread_yield();
126 131 #endif
127 } while ( 1 ); 132
133 }
134 while (1);
128 } 135 }
129 136
130 #if SDL_THREADS_DISABLED 137 #if SDL_THREADS_DISABLED
131 138
132 /* Non-threaded version of timer */ 139 /* Non-threaded version of timer */
133 140
134 int SDL_SYS_TimerInit(void) 141 int
135 { 142 SDL_SYS_TimerInit(void)
136 return(0); 143 {
137 } 144 return (0);
138 145 }
139 void SDL_SYS_TimerQuit(void) 146
140 { 147 void
141 SDL_SetTimer(0, NULL); 148 SDL_SYS_TimerQuit(void)
142 } 149 {
143 150 SDL_SetTimer(0, NULL);
144 int SDL_SYS_StartTimer(void) 151 }
145 { 152
146 timerStart = SDL_GetTicks(); 153 int
147 154 SDL_SYS_StartTimer(void)
148 return(0); 155 {
149 } 156 timerStart = SDL_GetTicks();
150 157
151 void SDL_SYS_StopTimer(void) 158 return (0);
152 { 159 }
153 /* Don't need to do anything as we use SDL_timer_running 160
154 to detect if we need to check the timer */ 161 void
155 } 162 SDL_SYS_StopTimer(void)
156 163 {
157 164 /* Don't need to do anything as we use SDL_timer_running
158 void RISCOS_CheckTimer() 165 to detect if we need to check the timer */
159 { 166 }
160 if (SDL_timer_running && SDL_GetTicks() - timerStart >= SDL_alarm_interval) 167
161 { 168
162 Uint32 ms; 169 void
163 170 RISCOS_CheckTimer()
164 ms = SDL_alarm_callback(SDL_alarm_interval); 171 {
165 if ( ms != SDL_alarm_interval ) 172 if (SDL_timer_running
166 { 173 && SDL_GetTicks() - timerStart >= SDL_alarm_interval) {
167 if ( ms ) 174 Uint32 ms;
168 { 175
169 SDL_alarm_interval = ROUND_RESOLUTION(ms); 176 ms = SDL_alarm_callback(SDL_alarm_interval);
170 } else 177 if (ms != SDL_alarm_interval) {
171 { 178 if (ms) {
172 SDL_alarm_interval = 0; 179 SDL_alarm_interval = ROUND_RESOLUTION(ms);
173 SDL_timer_running = 0; 180 } else {
174 } 181 SDL_alarm_interval = 0;
175 } 182 SDL_timer_running = 0;
176 if (SDL_alarm_interval) timerStart = SDL_GetTicks(); 183 }
177 } 184 }
185 if (SDL_alarm_interval)
186 timerStart = SDL_GetTicks();
187 }
178 } 188 }
179 189
180 #else 190 #else
181 191
182 /* Threaded version of timer - based on code for linux */ 192 /* Threaded version of timer - based on code for linux */
185 195
186 /* Data to handle a single periodic alarm */ 196 /* Data to handle a single periodic alarm */
187 static int timer_alive = 0; 197 static int timer_alive = 0;
188 static SDL_Thread *timer = NULL; 198 static SDL_Thread *timer = NULL;
189 199
190 static int RunTimer(void *unused) 200 static int
191 { 201 RunTimer(void *unused)
192 while ( timer_alive ) { 202 {
193 if ( SDL_timer_running ) { 203 while (timer_alive) {
194 SDL_ThreadedTimerCheck(); 204 if (SDL_timer_running) {
195 } 205 SDL_ThreadedTimerCheck();
196 SDL_Delay(1); 206 }
197 } 207 SDL_Delay(1);
198 return(0); 208 }
209 return (0);
199 } 210 }
200 211
201 /* This is only called if the event thread is not running */ 212 /* This is only called if the event thread is not running */
202 int SDL_SYS_TimerInit(void) 213 int
203 { 214 SDL_SYS_TimerInit(void)
204 timer_alive = 1; 215 {
205 timer = SDL_CreateThread(RunTimer, NULL); 216 timer_alive = 1;
206 if ( timer == NULL ) 217 timer = SDL_CreateThread(RunTimer, NULL);
207 return(-1); 218 if (timer == NULL)
208 return(SDL_SetTimerThreaded(1)); 219 return (-1);
209 } 220 return (SDL_SetTimerThreaded(1));
210 221 }
211 void SDL_SYS_TimerQuit(void) 222
212 { 223 void
213 timer_alive = 0; 224 SDL_SYS_TimerQuit(void)
214 if ( timer ) { 225 {
215 SDL_WaitThread(timer, NULL); 226 timer_alive = 0;
216 timer = NULL; 227 if (timer) {
217 } 228 SDL_WaitThread(timer, NULL);
218 } 229 timer = NULL;
219 230 }
220 int SDL_SYS_StartTimer(void) 231 }
221 { 232
222 SDL_SetError("Internal logic error: RISC OS uses threaded timer"); 233 int
223 return(-1); 234 SDL_SYS_StartTimer(void)
224 } 235 {
225 236 SDL_SetError("Internal logic error: RISC OS uses threaded timer");
226 void SDL_SYS_StopTimer(void) 237 return (-1);
227 { 238 }
228 return; 239
240 void
241 SDL_SYS_StopTimer(void)
242 {
243 return;
229 } 244 }
230 245
231 #endif /* SDL_THREADS_DISABLED */ 246 #endif /* SDL_THREADS_DISABLED */
232 247
233 #endif /* SDL_TIMER_RISCOS */ 248 #endif /* SDL_TIMER_RISCOS */
249 /* vi: set ts=4 sw=4 expandtab: */