private void Finish(object state)
{
GC.KeepAlive(state);
ThreadingHelper.SpinWaitWhile(ref _status, _changing);
if (Interlocked.CompareExchange(ref _status, _executing, _created) == _created)
{
var callback = Volatile.Read(ref Callback);
if (callback != null)
{
callback.Invoke();
Close();
Volatile.Write(ref _status, _executed);
}
}
}
private static void Initialize()
{
var check = Interlocked.CompareExchange(ref _status, _statusPending, _statusNotReady);
switch (check)
{
case _statusNotReady:
GC.KeepAlive(new GCProbe());
Volatile.Write(ref _status, _statusReady);
break;
case _statusPending:
ThreadingHelper.SpinWaitUntil(ref _status, _statusReady);
break;
}
}
public TReturn DisposedConditional <TReturn>(Func <TReturn> whenDisposed, Func <TReturn> whenNotDisposed)
{
if (_status == -1)
{
if (ReferenceEquals(whenDisposed, null))
{
return(default(TReturn));
}
else
{
return(whenDisposed.Invoke());
}
}
else
{
if (ReferenceEquals(whenNotDisposed, null))
{
return(default(TReturn));
}
else
{
if (ThreadingHelper.SpinWaitRelativeSet(ref _status, 1, -1))
{
try
{
return(whenNotDisposed.Invoke());
}
finally
{
global::System.Threading.Interlocked.Decrement(ref _status);
}
}
else
{
if (ReferenceEquals(whenDisposed, null))
{
return(default(TReturn));
}
else
{
return(whenDisposed.Invoke());
}
}
}
}
}
public bool Change(long dueTime)
{
if (Interlocked.CompareExchange(ref _status, _changing, _created) == _created)
{
_startTime = ThreadingHelper.Milliseconds(ThreadingHelper.TicksNow());
_targetTime = _startTime + dueTime;
var wrapped = Interlocked.CompareExchange(ref _wrapped, null, null);
if (wrapped == null)
{
return(false);
}
wrapped.Change(TimeSpan.FromMilliseconds(dueTime), TimeSpan.FromMilliseconds(-1));
Volatile.Write(ref _status, _created);
return(true);
}
return(false);
}
private bool TakeDisposalExecution()
{
return(_status != -1 && ThreadingHelper.SpinWaitSetUnless(ref _status, -1, 0, -1));
}
protected void Start(long dueTime)
{
_startTime = ThreadingHelper.Milliseconds(ThreadingHelper.TicksNow());
_targetTime = _startTime + dueTime;
_wrapped = new Timer(Finish, null, TimeSpan.FromMilliseconds(dueTime), TimeSpan.FromMilliseconds(-1));
}