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Fixed issue with endless waiting for next tic

Browse source 
https://forum.zdoom.org/viewtopic.php?t=58426&p=1028622#p1028547
This commit is contained in:
alexey.lysiuk 2017-11-25 11:03:37 +02:00
parent 0f5ff5a5de
commit 074a8e4895
1 changed files with 14 additions and 3 deletions
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17
src/i_time.cpp
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@ -130,11 +130,22 @@ int I_WaitForTic(int prevtic)
int time; int time;
while ((time = I_GetTime()) <= prevtic) while ((time = I_GetTime()) <= prevtic)
{ {
// Windows-specific note:
// The minimum amount of time a thread can sleep is controlled by timeBeginPeriod. // The minimum amount of time a thread can sleep is controlled by timeBeginPeriod.
// We set this to 1 ms in DoMain. // We set this to 1 ms in DoMain.
uint64_t sleepTime = NSToMS(FirstFrameStartTime + TicToNS(prevtic + 1) - I_nsTime());
if (sleepTime > 2) const uint64_t next = FirstFrameStartTime + TicToNS(prevtic + 1);
std::this_thread::sleep_for(std::chrono::milliseconds(sleepTime - 2)); const uint64_t now = I_nsTime();
if (next > now)
{
const uint64_t sleepTime = NSToMS(next - now);
if (sleepTime > 2)
{
std::this_thread::sleep_for(std::chrono::milliseconds(sleepTime - 2));
}
}
I_SetFrameTime(); I_SetFrameTime();
} }