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fix a risk of overflow on a time counter on Windows

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closes #4126
This commit is contained in:
Yann Collet 2025-03-23 11:42:41 -07:00
parent 6775af5b2e
commit 33f4d40d1e
1 changed files with 3 additions and 1 deletions
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4
programs/timefn.c
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@ -28,18 +28,20 @@
UTIL_time_t UTIL_getTime(void)
{
static LARGE_INTEGER ticksPerSecond;
static double nsFactor = 1.0;
static int init = 0;
if (!init) {
if (!QueryPerformanceFrequency(&ticksPerSecond)) {
perror("timefn::QueryPerformanceFrequency");
abort();
}
nsFactor = 1000000000.0 / (double)ticksPerSecond.QuadPart;
init = 1;
}
{ UTIL_time_t r;
LARGE_INTEGER x;
QueryPerformanceCounter(&x);
r.t = (PTime)(x.QuadPart * 1000000000ULL / ticksPerSecond.QuadPart);
r.t = (PTime)((double)x.QuadPart * nsFactor);
return r;
}
}