public static void SetState(this CancellationTokenSource source, object state)
{
if (source is CancellationTokenSourceWithState sourceWithState)
{
sourceWithState.State = state;
}
else
{
CancellationTokenSourceStateHolder.Get(source).State = state;
}
}
public static object GetState(this CancellationTokenSource source)
{
if (source is CancellationTokenSourceWithState sourceWithState)
{
return(sourceWithState.State);
}
else
{
return(CancellationTokenSourceStateHolder.Get(source).State);
}
}
public static CancellationTokenSourceStateHolder Get(CancellationTokenSource source)
{
CancellationTokenSourceStateHolder holder;
var timer = source.GetTimer();
if (timer != null)
{
timer.GetCallbackAndState(out var callback, out var state);
holder = state as CancellationTokenSourceStateHolder;
if (holder != null)
{
return(holder);
}
}
holder = new CancellationTokenSourceStateHolder
{
_source = source
};
if (timer != null)
{
timer.SetCallbackAndState(_timerCallback, holder);
}
else
{
#warning SuppressFlow is supported in .NET Standard 2.0, also why is it needed here?
#if NETFX
using (ExecutionContext.SuppressFlow())
#endif
{
timer = new Timer(_timerCallback, holder, -1, -1);
}
source.SetTimer(timer);
}
return(holder);
}
