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8211 | maxcodehac | 1 | /* |
2 | SDL - Simple DirectMedia Layer |
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3 | Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga |
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4 | |||
5 | This library is free software; you can redistribute it and/or |
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6 | modify it under the terms of the GNU Library General Public |
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7 | License as published by the Free Software Foundation; either |
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8 | version 2 of the License, or (at your option) any later version. |
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9 | |||
10 | This library is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | Library General Public License for more details. |
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14 | |||
15 | You should have received a copy of the GNU Library General Public |
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16 | License along with this library; if not, write to the Free |
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17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 | |||
19 | Sam Lantinga |
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20 | slouken@devolution.com |
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21 | */ |
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22 | |||
23 | #ifdef SAVE_RCSID |
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24 | static char rcsid = |
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25 | "@(#) $Id: SDL_systimer.c,v 1.2 2001/04/26 16:50:18 hercules Exp $"; |
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26 | #endif |
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27 | |||
28 | #include |
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9202 | turbocat | 29 | #include |
8211 | maxcodehac | 30 | #include |
31 | #include |
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32 | |||
33 | #include "SDL_error.h" |
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34 | #include "SDL_timer.h" |
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35 | #include "SDL_timer_c.h" |
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9288 | turbocat | 36 | #include "kos32sys.h" |
8211 | maxcodehac | 37 | |
38 | #if _POSIX_THREAD_SYSCALL_SOFT |
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39 | #include |
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40 | #endif |
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41 | |||
42 | #if defined(DISABLE_THREADS) || defined(FORK_HACK) |
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43 | #define USE_ITIMER |
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44 | #endif |
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45 | |||
46 | |||
47 | /* The first ticks value of the application */ |
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48 | //static struct timeval start; |
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49 | //static unsigned startlo,starthi; |
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50 | //static unsigned clockrate; |
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51 | static unsigned starttime; |
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52 | |||
53 | void SDL_StartTicks(void) |
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54 | { |
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55 | // gettimeofday(&start, NULL); |
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56 | // __asm__ ("int $0x40" : "=a"(clockrate) : "a"(18),"b"(5)); |
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57 | // __asm__ ("rdtsc" : "=a"(startlo),"=d"(starthi)); |
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58 | __asm__ ("int $0x40" : "=a"(starttime) : "a"(26),"b"(9)); |
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59 | } |
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60 | |||
61 | |||
62 | Uint32 SDL_GetTicks (void) |
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63 | { |
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64 | /* struct timeval now; |
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65 | Uint32 ticks; |
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66 | gettimeofday(&now, NULL); |
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67 | ticks=(now.tv_sec-start.tv_sec)*1000+(now.tv_usec-start.tv_usec)/1000; |
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68 | return(ticks);*/ |
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69 | /*int res; |
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70 | __asm__ ("rdtsc\n\t" |
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71 | "sub (_startlo),%%eax\n\t" |
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72 | "sbb (_starthi),%%edx\n\t" |
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73 | "push %%eax\n\t" |
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74 | "mov %%edx,%%eax\n\t" |
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75 | "mov $1000,%%ecx\n\t" |
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76 | "mul %%ecx\n\t" |
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77 | "xchg (%%esp),%%eax\n\t" |
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78 | "mul %%ecx\n\t" |
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79 | "add %%edx,(%%esp)\n\t" |
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80 | "pop %%edx\n\t" |
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81 | "divl (_clockrate)\n\t" : "=a"(res)); |
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82 | return res;*/ |
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83 | unsigned curtime; |
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84 | __asm__ ("int $0x40" : "=a"(curtime) : "a"(26),"b"(9)); |
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85 | return (curtime-starttime)*10; |
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86 | } |
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87 | |||
9211 | turbocat | 88 | void SDL_Delay(unsigned ms){ |
89 | unsigned start = SDL_GetTicks(); |
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90 | do{ |
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9288 | turbocat | 91 | delay(1); |
9211 | turbocat | 92 | }while (SDL_GetTicks()-start < ms); |
8211 | maxcodehac | 93 | } |
94 | |||
95 | int SDL_SYS_TimerInit(void) |
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96 | { |
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97 | return(0); |
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98 | } |
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99 | |||
100 | void SDL_SYS_TimerQuit(void) |
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101 | { |
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102 | } |
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103 | |||
104 | int SDL_SYS_StartTimer(void) |
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105 | { |
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106 | return(0); |
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107 | } |
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108 | |||
109 | void SDL_SYS_StopTimer(void) |
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110 | { |
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111 | }> |