diff options
Diffstat (limited to 'distrib/sdl-1.2.15/src/timer/wince/SDL_systimer.c')
| -rw-r--r-- | distrib/sdl-1.2.15/src/timer/wince/SDL_systimer.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/timer/wince/SDL_systimer.c b/distrib/sdl-1.2.15/src/timer/wince/SDL_systimer.c new file mode 100644 index 0000000..2b018b0 --- /dev/null +++ b/distrib/sdl-1.2.15/src/timer/wince/SDL_systimer.c @@ -0,0 +1,198 @@ +/* + 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_WINCE + +#define WIN32_LEAN_AND_MEAN +#include <windows.h> +#include <mmsystem.h> + +#include "SDL_thread.h" +#include "SDL_timer.h" +#include "../SDL_timer_c.h" + +static Uint64 start_date; +static Uint64 start_ticks; + +static Uint64 wce_ticks(void) +{ + return((Uint64)GetTickCount()); +} + +static Uint64 wce_date(void) +{ + union + { + FILETIME ftime; + Uint64 itime; + } ftime; + SYSTEMTIME stime; + + GetSystemTime(&stime); + SystemTimeToFileTime(&stime,&ftime.ftime); + ftime.itime/=10000; // Convert 100ns intervals to 1ms intervals + // Remove ms portion, which can't be relied on + ftime.itime -= (ftime.itime % 1000); + return(ftime.itime); +} + +static Sint32 wce_rel_ticks(void) +{ + return((Sint32)(wce_ticks()-start_ticks)); +} + +static Sint32 wce_rel_date(void) +{ + return((Sint32)(wce_date()-start_date)); +} + +/* Return time in ms relative to when SDL was started */ +Uint32 SDL_GetTicks() +{ + Sint32 offset=wce_rel_date()-wce_rel_ticks(); + if((offset < -1000) || (offset > 1000)) + { +// fprintf(stderr,"Time desync(%+d), resyncing\n",offset/1000); + start_ticks-=offset; + } + + return((Uint32)wce_rel_ticks()); +} + +/* Give up approx. givem milliseconds to the OS. */ +void SDL_Delay(Uint32 ms) +{ + Sleep(ms); +} + +/* Recard start-time of application for reference */ +void SDL_StartTicks(void) +{ + start_date=wce_date(); + start_ticks=wce_ticks(); +} + +static UINT WIN_timer; + +#if ( _WIN32_WCE <= 420 ) + +static HANDLE timersThread = 0; +static HANDLE timersQuitEvent = 0; + +DWORD TimersThreadProc(void *data) +{ + while(WaitForSingleObject(timersQuitEvent, 10) == WAIT_TIMEOUT) + { + SDL_ThreadedTimerCheck(); + } + return 0; +} + +int SDL_SYS_TimerInit(void) +{ + // create a thread to process a threaded timers + // SetTimer does not suit the needs because + // TimerCallbackProc will be called only when WM_TIMER occured + + timersQuitEvent = CreateEvent(0, TRUE, FALSE, 0); + if( !timersQuitEvent ) + { + SDL_SetError("Cannot create event for timers thread"); + return -1; + } + timersThread = CreateThread(NULL, 0, TimersThreadProc, 0, 0, 0); + if( !timersThread ) + { + SDL_SetError("Cannot create timers thread, check amount of RAM available"); + return -1; + } + SetThreadPriority(timersThread, THREAD_PRIORITY_HIGHEST); + + return(SDL_SetTimerThreaded(1)); +} + +void SDL_SYS_TimerQuit(void) +{ + SetEvent(timersQuitEvent); + if( WaitForSingleObject(timersThread, 2000) == WAIT_TIMEOUT ) + TerminateThread(timersThread, 0); + CloseHandle(timersThread); + CloseHandle(timersQuitEvent); + return; +} + +#else + +#pragma comment(lib, "mmtimer.lib") + +/* Data to handle a single periodic alarm */ +static UINT timerID = 0; + +static void CALLBACK HandleAlarm(UINT uID, UINT uMsg, DWORD dwUser, + DWORD dw1, DWORD dw2) +{ + SDL_ThreadedTimerCheck(); +} + + +int SDL_SYS_TimerInit(void) +{ + MMRESULT result; + + /* Set timer resolution */ + result = timeBeginPeriod(TIMER_RESOLUTION); + if ( result != TIMERR_NOERROR ) { + SDL_SetError("Warning: Can't set %d ms timer resolution", + TIMER_RESOLUTION); + } + /* Allow 10 ms of drift so we don't chew on CPU */ + timerID = timeSetEvent(TIMER_RESOLUTION,1,HandleAlarm,0,TIME_PERIODIC); + if ( ! timerID ) { + SDL_SetError("timeSetEvent() failed"); + return(-1); + } + return(SDL_SetTimerThreaded(1)); +} + +void SDL_SYS_TimerQuit(void) +{ + if ( timerID ) { + timeKillEvent(timerID); + } + timeEndPeriod(TIMER_RESOLUTION); +} + +#endif + +int SDL_SYS_StartTimer(void) +{ + SDL_SetError("Internal logic error: WinCE uses threaded timer"); + return(-1); +} + +void SDL_SYS_StopTimer(void) +{ + return; +} + +#endif /* SDL_TIMER_WINCE */ |