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LIBRETRO: fix delayMillis regular method

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This commit is contained in:
Giovanni Cascione 2023-05-07 15:24:22 +02:00
parent c6164fcf4a
commit 842a52fd42
1 changed files with 23 additions and 15 deletions
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38
backends/platform/libretro/src/libretro-os.cpp
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@ -678,27 +678,35 @@ public:
virtual void delayMillis(uint msecs) {
uint32 start_time = getMillis();
uint32 elapsed_time = 0;
_threadSwitchCaller = THREAD_SWITCH_DELAY;
uint32 elapsed_time = 0;
uint32 time_remaining = msecs;
while (time_remaining > 0) {
/* if remaining delay is lower than last amount of time spent on main thread, burn it in emu thread
to improve accuracy */
if (time_remaining >= ((LibretroTimerManager *)_timerManager)->spentOnMainThread()) {
/* If timing inaccuracies is enabled, when remaining delay would take us past the next
thread switch time, we switch immediately in order to burn as much as possible delay time in the main RetroArch
thread as soon as possible. */
if (timing_inaccuracies_is_enabled() && time_remaining >= ((LibretroTimerManager *)_timerManager)->timeToNextSwitch())
if (timing_inaccuracies_is_enabled()) {
while (elapsed_time < msecs) {
/* When remaining delay would take us past the next thread switch time, we switch immediately
in order to burn as much as possible delay time in the main RetroArch thread as soon as possible. */
if (msecs - elapsed_time >= ((LibretroTimerManager *)_timerManager)->timeToNextSwitch())
((LibretroTimerManager *)_timerManager)->switchThread();
else
((LibretroTimerManager *)_timerManager)->checkThread();
} else
usleep(1000);
usleep(1000);
elapsed_time = getMillis() - start_time;
time_remaining = time_remaining > elapsed_time ? time_remaining - elapsed_time : 0;
/* Actual delay provided will be lower than requested: elapsed time is calculated cumulatively.
i.e. the higher the requested delay, the higher the actual delay reduction */
elapsed_time += getMillis() - start_time;
}
} else {
while (elapsed_time < msecs) {
/* if remaining delay is lower than last amount of time spent on main thread, burn it in emu thread
to avoid exceeding requested delay */
if (msecs - elapsed_time >= ((LibretroTimerManager *)_timerManager)->spentOnMainThread() && !((LibretroTimerManager *)_timerManager)->timeToNextSwitch())
((LibretroTimerManager *)_timerManager)->switchThread();
else
usleep(1000);
elapsed_time = getMillis() - start_time;
}
}
((LibretroTimerManager *)_timerManager)->handler();
}