Struct spectrusty::chip::ThreadSyncTimer

impl ThreadSyncTimer

pub fn new(frame_duration_nanos: u32) -> ThreadSyncTimer

Pass the real time duration of a desired synchronization period (usually a duration of a video frame).

pub fn set_frame_duration(&mut self, frame_duration_nanos: u32)

Sets ThreadSyncTimer::frame_duration from the provided frame_duration_nanos.

pub fn restart(&mut self) -> Instant

Restarts the synchronization period. Useful e.g. for resuming paused emulation.

pub fn synchronize_thread_to_frame(&mut self) -> Result<(), u32>

Calculates the difference between the desired duration of a synchronization period and the real time that has passed from the start of the current period and levels the difference by calling std::thread::sleep.

This method may be called at the end of each iteration of an emulation loop to synchronize the running thread with a desired iteration period.

Returns Ok if the thread is in sync with the emulation. In this instance the value of ThreadSyncTimer::frame_duration is being added to ThreadSyncTimer::time to mark the beginning of a new period.

Returns Err(missed_periods) if the elapsed time exceeds the desired period duration. In this intance the start of a new period is set to Instant::now.

pub fn check_frame_elapsed(&mut self) -> Option<Duration>

Returns Some(excess_duration) if the time elapsed from the beginning of the current period exceeds or is equal to the desired duration of a synchronization period. Otherwise returns None.

The value returned is the excess time that has elapsed above the desired duration. If the time elapsed equals to the frame_duration the returned value equals to zero.

In case Some variant is returned the value of ThreadSyncTimer::frame_duration is being added to ThreadSyncTimer::time to mark the beginning of a new period.

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impl UnwindSafe for ThreadSyncTimer

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