using System;
+using System.Threading;
using System.Runtime.InteropServices;
-namespace Bah {
class Test {
delegate int SimpleDelegate (int a);
static int F (int a) {
Console.WriteLine ("Test.F from delegate: " + a);
+ Thread.Sleep (200);
return a;
}
static void async_callback (IAsyncResult ar)
{
- Console.WriteLine ("Async Callback");
+ Console.WriteLine ("Async Callback " + ar.AsyncState);
}
static int Main () {
SimpleDelegate d = new SimpleDelegate (F);
AsyncCallback ac = new AsyncCallback (async_callback);
- string state = "STATE OBJECT";
+ string state1 = "STATE1";
+ string state2 = "STATE2";
+ string state3 = "STATE3";
+ string state4 = "STATE4";
+ int fin = 0;
- IAsyncResult ar = d.BeginInvoke (3, ac, state);
+ IAsyncResult ar1 = d.BeginInvoke (1, ac, state1);
+ IAsyncResult ar2 = d.BeginInvoke (2, ac, state2);
+ IAsyncResult ar3 = d.BeginInvoke (3, ac, state3);
+ IAsyncResult ar4 = d.BeginInvoke (4, ac, state4);
- d.EndInvoke (ar);
+ int res = d.EndInvoke (ar1);
+
+ Console.WriteLine ("Result = " + res);
+
+ try {
+ d.EndInvoke (ar1);
+ } catch (InvalidOperationException) {
+ Console.WriteLine ("cant execute EndInvoke twice ... OK");
+ }
+
+ ar1.AsyncWaitHandle.WaitOne ();
+ if (ar1.IsCompleted) fin++;
+ Console.WriteLine ("completed1: " + ar1.IsCompleted);
+ ar2.AsyncWaitHandle.WaitOne ();
+ if (ar2.IsCompleted) fin++;
+ Console.WriteLine ("completed2: " + ar2.IsCompleted);
+ ar3.AsyncWaitHandle.WaitOne ();
+ if (ar3.IsCompleted) fin++;
+ Console.WriteLine ("completed3: " + ar3.IsCompleted);
+ ar4.AsyncWaitHandle.WaitOne ();
+ if (ar4.IsCompleted) fin++;
+ Console.WriteLine ("completed4: " + ar4.IsCompleted);
+
+ if (fin != 4)
+ return 1;
return 0;
}
}
-}