1/* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 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#if defined(SDL_TIMER_DUMMY) || defined(SDL_TIMERS_DISABLED) 25 26#include "SDL_timer.h" 27#include "../SDL_timer_c.h" 28 29void SDL_StartTicks(void) 30{ 31} 32 33Uint32 SDL_GetTicks (void) 34{ 35 SDL_Unsupported(); 36 return 0; 37} 38 39void SDL_Delay (Uint32 ms) 40{ 41 SDL_Unsupported(); 42} 43 44#include "SDL_thread.h" 45 46/* Data to handle a single periodic alarm */ 47static int timer_alive = 0; 48static SDL_Thread *timer = NULL; 49 50static int RunTimer(void *unused) 51{ 52 while ( timer_alive ) { 53 if ( SDL_timer_running ) { 54 SDL_ThreadedTimerCheck(); 55 } 56 SDL_Delay(1); 57 } 58 return(0); 59} 60 61/* This is only called if the event thread is not running */ 62int SDL_SYS_TimerInit(void) 63{ 64 timer_alive = 1; 65 timer = SDL_CreateThread(RunTimer, NULL); 66 if ( timer == NULL ) 67 return(-1); 68 return(SDL_SetTimerThreaded(1)); 69} 70 71void SDL_SYS_TimerQuit(void) 72{ 73 timer_alive = 0; 74 if ( timer ) { 75 SDL_WaitThread(timer, NULL); 76 timer = NULL; 77 } 78} 79 80int SDL_SYS_StartTimer(void) 81{ 82 SDL_SetError("Internal logic error: threaded timer in use"); 83 return(-1); 84} 85 86void SDL_SYS_StopTimer(void) 87{ 88 return; 89} 90 91#endif /* SDL_TIMER_DUMMY || SDL_TIMERS_DISABLED */ 92