Mercurial > sdl-ios-xcode
annotate src/timer/linux/SDL_systimer.c @ 753:b14fdadd8311
Date: Thu, 4 Dec 2003 07:48:40 +0200
From: "Mike Gorchak"
Subject: SDL/QNX6 new patch
Here in attachment my patch for the SDL/QNX6 again :) It contain non-crtitical/cosmetic fixes:
1. Fixed window centering at other than the first consoles.
2. Fixed window centering algorithm in case when window height or width are greater than the desktop resolution.
3. Fixed window positioning on other than the first consoles.
4. Fixed occasional input focus lost when switching to fullscreen.
5. Removed the Photon's default chroma color for the overlays, added RGB(12, 6, 12) color instead (very dark pink).
6. Added more checks to the YUV overlay code (fixed crashes during resolution mode switches).
7. Added support for Enter/Backspace keys in unicode mode (used by Maelstrom and by other games).
8. Fixed window restore/maximize function. It works, finally.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 10 Dec 2003 12:35:56 +0000 |
| parents | 104f32d04cd1 |
| children | b8d311d90021 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information for 2002
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
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20 slouken@libsdl.org |
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21 |
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22 RDTSC stuff by lompik (lompik@voila.fr) 20/03/2002 |
| 0 | 23 */ |
| 24 | |
| 25 #ifdef SAVE_RCSID | |
| 26 static char rcsid = | |
| 27 "@(#) $Id$"; | |
| 28 #endif | |
| 29 | |
| 30 #include <stdio.h> | |
| 31 #include <sys/time.h> | |
| 32 #include <signal.h> | |
| 33 #include <unistd.h> | |
| 34 #include <string.h> | |
| 35 #include <errno.h> | |
| 36 | |
| 37 #include "SDL_error.h" | |
| 38 #include "SDL_timer.h" | |
| 39 #include "SDL_timer_c.h" | |
| 40 | |
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41 #if _POSIX_THREAD_SYSCALL_SOFT |
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42 #include <pthread.h> |
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43 #endif |
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44 #ifdef ENABLE_PTH |
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45 #include <pth.h> |
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46 #endif |
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47 |
| 0 | 48 #if defined(DISABLE_THREADS) || defined(FORK_HACK) |
| 49 #define USE_ITIMER | |
| 50 #endif | |
| 51 | |
| 52 /* The following defines should really be determined at configure time */ | |
| 53 | |
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54 #if defined(linux) |
| 0 | 55 /* Linux select() changes its timeout parameter upon return to contain |
| 56 the remaining time. Most other unixen leave it unchanged or undefined. */ | |
| 57 #define SELECT_SETS_REMAINING | |
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58 #elif defined(__bsdi__) || defined(__FreeBSD__) || defined(__sun) |
| 0 | 59 #define USE_NANOSLEEP |
| 60 #endif | |
| 61 | |
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62 #if defined(i386) || defined(__i386__) |
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63 /* This only works on pentium or newer x86 processors */ |
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64 /* Actually, this isn't reliable on multi-cpu systems, so is disabled */ |
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65 /*#define USE_RDTSC*/ |
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66 #endif |
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67 |
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68 |
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69 #ifdef USE_RDTSC |
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70 |
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71 /* The first ticks value of the application */ |
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72 static unsigned long long start; |
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73 static float cpu_mhz1000 = 0.0f; |
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74 |
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75 #if 1 |
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76 /* This is for old binutils version that don't recognize rdtsc mnemonics. |
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77 But all binutils version supports this. |
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78 */ |
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79 #define rdtsc(t) asm __volatile__ (".byte 0x0f, 0x31; " : "=A" (t)) |
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80 #else |
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81 #define rdtsc(t) asm __volatile__ ("rdtsc" : "=A" (t)) |
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82 #endif |
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83 |
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84 static float calc_cpu_mhz(void) |
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85 { |
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86 float cpu_mhz; |
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87 unsigned long long tsc_start; |
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88 unsigned long long tsc_end; |
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89 struct timeval tv_start, tv_end; |
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90 long usec_delay; |
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91 |
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92 rdtsc(tsc_start); |
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93 gettimeofday(&tv_start, NULL); |
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94 sleep(1); |
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95 rdtsc(tsc_end); |
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96 gettimeofday(&tv_end, NULL); |
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97 usec_delay = 1000000L * (tv_end.tv_sec - tv_start.tv_sec) + |
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98 (tv_end.tv_usec - tv_start.tv_usec); |
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99 cpu_mhz = (float)(tsc_end-tsc_start) / usec_delay; |
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100 #if 0 |
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101 printf("cpu MHz\t\t: %.3f\n", cpu_mhz); |
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102 #endif |
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103 return cpu_mhz; |
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104 } |
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105 |
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106 #else |
| 0 | 107 |
| 108 /* The first ticks value of the application */ | |
| 109 static struct timeval start; | |
| 110 | |
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111 #endif /* USE_RDTSC */ |
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112 |
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113 |
| 0 | 114 void SDL_StartTicks(void) |
| 115 { | |
| 116 /* Set first ticks value */ | |
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117 #ifdef USE_RDTSC |
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118 if ( ! cpu_mhz1000 ) { |
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119 cpu_mhz1000 = calc_cpu_mhz() * 1000.0f; |
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120 } |
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121 rdtsc(start); |
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122 #else |
| 0 | 123 gettimeofday(&start, NULL); |
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124 #endif /* USE_RDTSC */ |
| 0 | 125 } |
| 126 | |
| 127 Uint32 SDL_GetTicks (void) | |
| 128 { | |
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129 #ifdef USE_RDTSC |
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130 unsigned long long now; |
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131 if ( ! cpu_mhz1000 ) { |
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132 return 0; /* Shouldn't happen. BUG!! */ |
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133 } |
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134 rdtsc(now); |
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135 return (Uint32)((now-start)/cpu_mhz1000); |
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136 #else |
| 0 | 137 struct timeval now; |
| 138 Uint32 ticks; | |
| 139 | |
| 140 gettimeofday(&now, NULL); | |
| 141 ticks=(now.tv_sec-start.tv_sec)*1000+(now.tv_usec-start.tv_usec)/1000; | |
| 142 return(ticks); | |
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143 #endif /* USE_RDTSC */ |
| 0 | 144 } |
| 145 | |
| 146 void SDL_Delay (Uint32 ms) | |
| 147 { | |
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148 #ifdef ENABLE_PTH |
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149 pth_time_t tv; |
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150 tv.tv_sec = ms/1000; |
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151 tv.tv_usec = (ms%1000)*1000; |
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152 pth_nap(tv); |
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153 #else |
| 0 | 154 int was_error; |
| 155 | |
| 156 #ifdef USE_NANOSLEEP | |
| 157 struct timespec elapsed, tv; | |
| 158 #else | |
| 159 struct timeval tv; | |
| 160 #ifndef SELECT_SETS_REMAINING | |
| 161 Uint32 then, now, elapsed; | |
| 162 #endif | |
| 163 #endif | |
| 164 | |
| 165 /* Set the timeout interval - Linux only needs to do this once */ | |
| 166 #ifdef SELECT_SETS_REMAINING | |
| 167 tv.tv_sec = ms/1000; | |
| 168 tv.tv_usec = (ms%1000)*1000; | |
| 169 #elif defined(USE_NANOSLEEP) | |
| 170 elapsed.tv_sec = ms/1000; | |
| 171 elapsed.tv_nsec = (ms%1000)*1000000; | |
| 172 #else | |
| 173 then = SDL_GetTicks(); | |
| 174 #endif | |
| 175 do { | |
| 176 errno = 0; | |
| 177 | |
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178 #if _POSIX_THREAD_SYSCALL_SOFT |
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179 pthread_yield_np(); |
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180 #endif |
| 0 | 181 #ifdef USE_NANOSLEEP |
| 182 tv.tv_sec = elapsed.tv_sec; | |
| 183 tv.tv_nsec = elapsed.tv_nsec; | |
| 184 was_error = nanosleep(&tv, &elapsed); | |
| 185 #else | |
| 186 #ifndef SELECT_SETS_REMAINING | |
| 187 /* Calculate the time interval left (in case of interrupt) */ | |
| 188 now = SDL_GetTicks(); | |
| 189 elapsed = (now-then); | |
| 190 then = now; | |
| 191 if ( elapsed >= ms ) { | |
| 192 break; | |
| 193 } | |
| 194 ms -= elapsed; | |
| 195 tv.tv_sec = ms/1000; | |
| 196 tv.tv_usec = (ms%1000)*1000; | |
| 197 #endif | |
| 198 was_error = select(0, NULL, NULL, NULL, &tv); | |
| 199 #endif /* USE_NANOSLEEP */ | |
| 200 } while ( was_error && (errno == EINTR) ); | |
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104f32d04cd1
Fixed building with pthreads and the pth library
Sam Lantinga <slouken@libsdl.org>
parents:
392
diff
changeset
|
201 #endif /* ENABLE_PTH */ |
| 0 | 202 } |
| 203 | |
| 204 #ifdef USE_ITIMER | |
| 205 | |
| 206 static void HandleAlarm(int sig) | |
| 207 { | |
| 208 Uint32 ms; | |
| 209 | |
| 210 if ( SDL_alarm_callback ) { | |
| 211 ms = (*SDL_alarm_callback)(SDL_alarm_interval); | |
| 212 if ( ms != SDL_alarm_interval ) { | |
| 213 SDL_SetTimer(ms, SDL_alarm_callback); | |
| 214 } | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 int SDL_SYS_TimerInit(void) | |
| 219 { | |
| 220 struct sigaction action; | |
| 221 | |
| 222 /* Set the alarm handler (Linux specific) */ | |
| 223 memset(&action, 0, sizeof(action)); | |
| 224 action.sa_handler = HandleAlarm; | |
| 225 action.sa_flags = SA_RESTART; | |
| 226 sigemptyset(&action.sa_mask); | |
| 227 sigaction(SIGALRM, &action, NULL); | |
| 228 return(0); | |
| 229 } | |
| 230 | |
| 231 void SDL_SYS_TimerQuit(void) | |
| 232 { | |
| 233 SDL_SetTimer(0, NULL); | |
| 234 } | |
| 235 | |
| 236 int SDL_SYS_StartTimer(void) | |
| 237 { | |
| 238 struct itimerval timer; | |
| 239 | |
| 240 timer.it_value.tv_sec = (SDL_alarm_interval/1000); | |
| 241 timer.it_value.tv_usec = (SDL_alarm_interval%1000)*1000; | |
| 242 timer.it_interval.tv_sec = (SDL_alarm_interval/1000); | |
| 243 timer.it_interval.tv_usec = (SDL_alarm_interval%1000)*1000; | |
| 244 setitimer(ITIMER_REAL, &timer, NULL); | |
| 245 return(0); | |
| 246 } | |
| 247 | |
| 248 void SDL_SYS_StopTimer(void) | |
| 249 { | |
| 250 struct itimerval timer; | |
| 251 | |
| 252 memset(&timer, 0, (sizeof timer)); | |
| 253 setitimer(ITIMER_REAL, &timer, NULL); | |
| 254 } | |
| 255 | |
| 256 #else /* USE_ITIMER */ | |
| 257 | |
| 258 #include "SDL_thread.h" | |
| 259 | |
| 260 /* Data to handle a single periodic alarm */ | |
| 261 static int timer_alive = 0; | |
| 262 static SDL_Thread *timer = NULL; | |
| 263 | |
| 264 static int RunTimer(void *unused) | |
| 265 { | |
| 266 while ( timer_alive ) { | |
| 267 if ( SDL_timer_running ) { | |
| 268 SDL_ThreadedTimerCheck(); | |
| 269 } | |
| 270 SDL_Delay(1); | |
| 271 } | |
| 272 return(0); | |
| 273 } | |
| 274 | |
| 275 /* This is only called if the event thread is not running */ | |
| 276 int SDL_SYS_TimerInit(void) | |
| 277 { | |
| 278 timer_alive = 1; | |
| 279 timer = SDL_CreateThread(RunTimer, NULL); | |
| 280 if ( timer == NULL ) | |
| 281 return(-1); | |
| 282 return(SDL_SetTimerThreaded(1)); | |
| 283 } | |
| 284 | |
| 285 void SDL_SYS_TimerQuit(void) | |
| 286 { | |
| 287 timer_alive = 0; | |
| 288 if ( timer ) { | |
| 289 SDL_WaitThread(timer, NULL); | |
| 290 timer = NULL; | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 int SDL_SYS_StartTimer(void) | |
| 295 { | |
| 296 SDL_SetError("Internal logic error: Linux uses threaded timer"); | |
| 297 return(-1); | |
| 298 } | |
| 299 | |
| 300 void SDL_SYS_StopTimer(void) | |
| 301 { | |
| 302 return; | |
| 303 } | |
| 304 | |
| 305 #endif /* USE_ITIMER */ |