public static Action <Action> ForEach <T>(this IEnumerable <T> source, Action <Action> ready, Action <T, int, Action> handler, Action done)
{
var c = new FutureStream();
var e = default(IEnumerator <T>);
var i = -1;
var r = new Future();
var MoveNext = default(Action <Action>);
//Console.WriteLine("ForEach");
MoveNext =
SignalNext =>
{
if (e.MoveNext())
{
//Console.WriteLine("ForEach handler");
i++;
c.Continue(MoveNext);
//Console.WriteLine("ForEach handler invoke");
handler(e.Current, i, SignalNext);
}
else
{
//Console.WriteLine("ForEach done");
e.Dispose();
e = null;
c = null;
MoveNext = null;
if (done != null)
{
done();
}
r.Signal();
}
};
var SignalFirst = c.Continue(
SignalNext =>
{
//Console.WriteLine("ForEach SignalFirst");
e = source.AsEnumerable().GetEnumerator();
MoveNext(SignalNext);
}
);
if (ready != null)
{
ready(SignalFirst);
}
else
{
SignalFirst();
}
return(r.Continue);
}
public FutureStream()
{
this.Gate = new Future();
}