private EventHandle OpenEvent(Frame frame)
{
var now = DateTime.UtcNow;
return(this.EnsureNotFrozen(
() =>
{
var handle = new EventHandle(this, frame, now);
var addResult = this.EventHandles.TryAdd(handle, true);
Debug.Assert(addResult);
return handle;
}));
}
public void CloseEvent(EventHandle eventHandle)
{
var now = DateTime.UtcNow;
this.EnsureNotFrozen(
() =>
{
var frameIndex = this.ProfileContext.TryAddFrame(eventHandle.Frame);
var openEvent = new OpenFrameEvent(
this.GetTimeValue(eventHandle.StartTime),
frameIndex
);
this.Events.Add(openEvent);
var removeResult = this.EventHandles.TryRemove(eventHandle, out var value);
Debug.Assert(removeResult && value);
var epsilon = (long)(1 / this.TickFactor * 0.001); // 0.001 units
if (now.Ticks - eventHandle.StartTime.Ticks <= epsilon)
{
// too close, pretend as if it was never happened
return;
}
// make some gap between this event and whatever event which may be open in the
// same time, otherwise speedscope may (mistakenly) treat this event as the parent
// of the upcoming event
now = now.AddTicks(-epsilon);
var closeEvent = new CloseFrameEvent(
this.GetTimeValue(now),
frameIndex);
this.Events.Add(closeEvent);
});
}