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libobs/util: Use integer math for Windows timing

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Cleaner and faster than double math.
This commit is contained in:
jpark37 2022-02-28 09:19:11 -08:00 committed by Jim
parent 4e5906d2b0
commit fbcb053cfa
1 changed files with 5 additions and 9 deletions
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14
libobs/util/platform-windows.c
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@ -26,6 +26,7 @@
#include "platform.h"
#include "darray.h"
#include "dstr.h"
#include "util_uint64.h"
#include "windows/win-registry.h"
#include "windows/win-version.h"
@ -332,9 +333,9 @@ void os_cpu_usage_info_destroy(os_cpu_usage_info_t *info)
bool os_sleepto_ns(uint64_t time_target)
{
const double freq = (double)get_clockfreq();
const uint64_t freq = get_clockfreq();
const LONGLONG count_target =
(LONGLONG)(round((double)time_target * freq / 1000000000.0));
util_mul_div64(time_target, freq, 1000000000);
LARGE_INTEGER count;
QueryPerformanceCounter(&count);
@ -371,14 +372,9 @@ void os_sleep_ms(uint32_t duration)
uint64_t os_gettime_ns(void)
{
LARGE_INTEGER current_time;
double time_val;
QueryPerformanceCounter(&current_time);
time_val = (double)current_time.QuadPart;
time_val *= 1000000000.0;
time_val /= (double)get_clockfreq();
return (uint64_t)time_val;
return util_mul_div64(current_time.QuadPart, 1000000000,
get_clockfreq());
}
/* returns [folder]\[name] on windows */