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SDL_systimer.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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#ifdef SDL_TIMER_WINCE
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#include "../../core/windows/SDL_windows.h"
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#include "SDL_timer.h"
static Uint64 start_date;
static Uint64 start_ticks;
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static Uint64
wce_ticks(void)
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return ((Uint64) GetTickCount());
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static Uint64
wce_date(void)
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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);
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static Sint32
wce_rel_ticks(void)
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return ((Sint32) (wce_ticks() - start_ticks));
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static Sint32
wce_rel_date(void)
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return ((Sint32) (wce_date() - start_date));
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/* Recard start-time of application for reference */
void
SDL_StartTicks(void)
{
start_date = wce_date();
start_ticks = wce_ticks();
}
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/* Return time in ms relative to when SDL was started */
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Uint32
SDL_GetTicks()
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Sint32 offset = wce_rel_date() - wce_rel_ticks();
if ((offset < -1000) || (offset > 1000)) {
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// fprintf(stderr,"Time desync(%+d), resyncing\n",offset/1000);
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start_ticks -= offset;
}
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return ((Uint32) wce_rel_ticks());
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}
/* Give up approx. givem milliseconds to the OS. */
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void
SDL_Delay(Uint32 ms)
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#endif /* SDL_TIMER_WINCE */
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/* vi: set ts=4 sw=4 expandtab: */