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Make delay_usec more precise

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Comment fix
This commit is contained in:
mrsaturnsan 2024-11-13 10:19:21 -06:00 committed by mrsaturnsan
parent ef8d981267
commit df3367f334
1 changed files with 16 additions and 4 deletions
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20
platform/windows/os_windows.cpp
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@ -769,10 +769,22 @@ double OS_Windows::get_unix_time() const {
}
void OS_Windows::delay_usec(uint32_t p_usec) const {
if (p_usec < 1000) {
Sleep(1);
} else {
Sleep(p_usec / 1000);
constexpr uint32_t tolerance = 1000 + 20;
uint64_t t0 = get_ticks_usec();
uint64_t target_time = t0 + p_usec;
// Calculate sleep duration with a tolerance for fine-tuning.
if (p_usec > tolerance) {
uint32_t coarse_sleep_usec = p_usec - tolerance;
if (coarse_sleep_usec >= 1000) {
Sleep(coarse_sleep_usec / 1000);
}
}
// Spin-wait until we reach the precise target time.
while (get_ticks_usec() < target_time) {
YieldProcessor();
}
}