| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 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_DC |
| 25 | |
| 26 | #include <kos.h> |
| 27 | |
| 28 | #include "SDL_thread.h" |
| 29 | #include "SDL_timer.h" |
| 30 | #include "../SDL_timer_c.h" |
| 31 | |
| 32 | static unsigned start; |
| 33 | |
| 34 | /* |
| 35 | jif = ms * HZ /1000 |
| 36 | ms = jif * 1000/HZ |
| 37 | */ |
| 38 | |
| 39 | void SDL_StartTicks(void) |
| 40 | { |
| 41 | /* Set first ticks value */ |
| 42 | start = jiffies; |
| 43 | } |
| 44 | |
| 45 | Uint32 SDL_GetTicks(void) |
| 46 | { |
| 47 | return((jiffies-start)*1000/HZ); |
| 48 | } |
| 49 | |
| 50 | void SDL_Delay(Uint32 ms) |
| 51 | { |
| 52 | thd_sleep(ms); |
| 53 | } |
| 54 | |
| 55 | /* Data to handle a single periodic alarm */ |
| 56 | static int timer_alive = 0; |
| 57 | static SDL_Thread *timer = NULL; |
| 58 | |
| 59 | static int RunTimer(void *unused) |
| 60 | { |
| 61 | while ( timer_alive ) { |
| 62 | if ( SDL_timer_running ) { |
| 63 | SDL_ThreadedTimerCheck(); |
| 64 | } |
| 65 | SDL_Delay(10); |
| 66 | } |
| 67 | return(0); |
| 68 | } |
| 69 | |
| 70 | /* This is only called if the event thread is not running */ |
| 71 | int SDL_SYS_TimerInit(void) |
| 72 | { |
| 73 | timer_alive = 1; |
| 74 | timer = SDL_CreateThread(RunTimer, NULL); |
| 75 | if ( timer == NULL ) |
| 76 | return(-1); |
| 77 | return(SDL_SetTimerThreaded(1)); |
| 78 | } |
| 79 | |
| 80 | void SDL_SYS_TimerQuit(void) |
| 81 | { |
| 82 | timer_alive = 0; |
| 83 | if ( timer ) { |
| 84 | SDL_WaitThread(timer, NULL); |
| 85 | timer = NULL; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | int SDL_SYS_StartTimer(void) |
| 90 | { |
| 91 | SDL_SetError("Internal logic error: DC uses threaded timer"); |
| 92 | return(-1); |
| 93 | } |
| 94 | |
| 95 | void SDL_SYS_StopTimer(void) |
| 96 | { |
| 97 | return; |
| 98 | } |
| 99 | |
| 100 | #endif /* SDL_TIMER_DC */ |