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QueryPerformanceCounter() is reliable these days, and setting the timer frequency higher can have adverse power consequences.

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dd757624%28v=vs.85%29.aspx
This commit is contained in:
Sam Lantinga 2013-05-02 16:54:03 -07:00
parent 0e9ba88315
commit 98819d0d8d
1 changed files with 4 additions and 4 deletions
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8
src/timer/windows/SDL_systimer.c
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@ -48,13 +48,13 @@ SDL_StartTicks(void)
#ifdef USE_GETTICKCOUNT #ifdef USE_GETTICKCOUNT
start = GetTickCount(); start = GetTickCount();
#else #else
#if 0 /* Apparently there are problems with QPC on Win2K */ /* QueryPerformanceCounter has had problems in the past, but lots of games
use it, so we'll rely on it here.
*/
if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) { if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) {
hires_timer_available = TRUE; hires_timer_available = TRUE;
QueryPerformanceCounter(&hires_start_ticks); QueryPerformanceCounter(&hires_start_ticks);
} else } else {
#endif
{
hires_timer_available = FALSE; hires_timer_available = FALSE;
timeBeginPeriod(1); /* use 1 ms timer precision */ timeBeginPeriod(1); /* use 1 ms timer precision */
start = timeGetTime(); start = timeGetTime();