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| Rev | Author | Line No. | Line |
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| 5131 | clevermous | 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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| 29 | #include |
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| 30 | #include |
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| 31 | #include |
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| 32 | #include |
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| 33 | #include |
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| 6356 | ashmew2 | 34 | #include |
| 5131 | clevermous | 35 | |
| 36 | #include "SDL_error.h" |
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| 37 | #include "SDL_timer.h" |
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| 38 | #include "SDL_timer_c.h" |
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| 39 | |||
| 40 | #if _POSIX_THREAD_SYSCALL_SOFT |
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| 41 | #include |
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| 42 | #endif |
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| 43 | |||
| 44 | #if defined(DISABLE_THREADS) || defined(FORK_HACK) |
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| 45 | #define USE_ITIMER |
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| 46 | #endif |
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| 47 | |||
| 48 | |||
| 49 | /* The first ticks value of the application */ |
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| 50 | //static struct timeval start; |
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| 51 | //static unsigned startlo,starthi; |
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| 52 | //static unsigned clockrate; |
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| 53 | static unsigned starttime; |
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| 54 | |||
| 55 | void SDL_StartTicks(void) |
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| 56 | { |
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| 57 | // gettimeofday(&start, NULL); |
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| 58 | // __asm__ ("int $0x40" : "=a"(clockrate) : "a"(18),"b"(5)); |
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| 59 | // __asm__ ("rdtsc" : "=a"(startlo),"=d"(starthi)); |
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| 60 | __asm__ ("int $0x40" : "=a"(starttime) : "a"(26),"b"(9)); |
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| 61 | } |
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| 62 | |||
| 63 | |||
| 64 | Uint32 SDL_GetTicks (void) |
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| 65 | { |
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| 66 | /* struct timeval now; |
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| 67 | Uint32 ticks; |
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| 68 | gettimeofday(&now, NULL); |
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| 69 | ticks=(now.tv_sec-start.tv_sec)*1000+(now.tv_usec-start.tv_usec)/1000; |
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| 70 | return(ticks);*/ |
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| 71 | /*int res; |
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| 72 | __asm__ ("rdtsc\n\t" |
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| 73 | "sub (_startlo),%%eax\n\t" |
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| 74 | "sbb (_starthi),%%edx\n\t" |
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| 75 | "push %%eax\n\t" |
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| 76 | "mov %%edx,%%eax\n\t" |
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| 77 | "mov $1000,%%ecx\n\t" |
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| 78 | "mul %%ecx\n\t" |
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| 79 | "xchg (%%esp),%%eax\n\t" |
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| 80 | "mul %%ecx\n\t" |
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| 81 | "add %%edx,(%%esp)\n\t" |
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| 82 | "pop %%edx\n\t" |
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| 83 | "divl (_clockrate)\n\t" : "=a"(res)); |
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| 84 | return res;*/ |
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| 85 | unsigned curtime; |
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| 86 | __asm__ ("int $0x40" : "=a"(curtime) : "a"(26),"b"(9)); |
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| 87 | return (curtime-starttime)*10; |
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| 88 | } |
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| 89 | |||
| 90 | void SDL_Delay (Uint32 ms) |
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| 91 | { |
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| 6356 | ashmew2 | 92 | delay(ms * 100); |
| 5131 | clevermous | 93 | /* Uint32 start = SDL_GetTicks(); |
| 94 | do |
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| 95 | __asm__("int $0x40" :: "a"(68),"b"(1)); |
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| 96 | while (SDL_GetTicks()-start < ms);*/ |
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| 97 | } |
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| 98 | |||
| 99 | int SDL_SYS_TimerInit(void) |
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| 100 | { |
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| 101 | return(0); |
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| 102 | } |
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| 103 | |||
| 104 | void SDL_SYS_TimerQuit(void) |
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| 105 | { |
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| 106 | } |
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| 107 | |||
| 108 | int SDL_SYS_StartTimer(void) |
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| 109 | { |
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| 110 | return(0); |
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| 111 | } |
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| 112 | |||
| 113 | void SDL_SYS_StopTimer(void) |
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| 114 | { |
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| 115 | } |