From 9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f Mon Sep 17 00:00:00 2001 From: Jesse Hall Date: Mon, 9 Jul 2012 11:27:07 -0700 Subject: Import SDL release-1.2.15 Change-Id: I505c4aea24325cad475f217db5589814b4c75dbf --- distrib/sdl-1.2.15/src/timer/dc/SDL_systimer.c | 100 +++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 distrib/sdl-1.2.15/src/timer/dc/SDL_systimer.c (limited to 'distrib/sdl-1.2.15/src/timer/dc/SDL_systimer.c') diff --git a/distrib/sdl-1.2.15/src/timer/dc/SDL_systimer.c b/distrib/sdl-1.2.15/src/timer/dc/SDL_systimer.c new file mode 100644 index 0000000..386e158 --- /dev/null +++ b/distrib/sdl-1.2.15/src/timer/dc/SDL_systimer.c @@ -0,0 +1,100 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2012 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +#ifdef SDL_TIMER_DC + +#include + +#include "SDL_thread.h" +#include "SDL_timer.h" +#include "../SDL_timer_c.h" + +static unsigned start; + +/* + jif = ms * HZ /1000 + ms = jif * 1000/HZ +*/ + +void SDL_StartTicks(void) +{ + /* Set first ticks value */ + start = jiffies; +} + +Uint32 SDL_GetTicks(void) +{ + return((jiffies-start)*1000/HZ); +} + +void SDL_Delay(Uint32 ms) +{ + thd_sleep(ms); +} + +/* Data to handle a single periodic alarm */ +static int timer_alive = 0; +static SDL_Thread *timer = NULL; + +static int RunTimer(void *unused) +{ + while ( timer_alive ) { + if ( SDL_timer_running ) { + SDL_ThreadedTimerCheck(); + } + SDL_Delay(10); + } + return(0); +} + +/* This is only called if the event thread is not running */ +int SDL_SYS_TimerInit(void) +{ + timer_alive = 1; + timer = SDL_CreateThread(RunTimer, NULL); + if ( timer == NULL ) + return(-1); + return(SDL_SetTimerThreaded(1)); +} + +void SDL_SYS_TimerQuit(void) +{ + timer_alive = 0; + if ( timer ) { + SDL_WaitThread(timer, NULL); + timer = NULL; + } +} + +int SDL_SYS_StartTimer(void) +{ + SDL_SetError("Internal logic error: DC uses threaded timer"); + return(-1); +} + +void SDL_SYS_StopTimer(void) +{ + return; +} + +#endif /* SDL_TIMER_DC */ -- cgit v1.1