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using System;
using System.Threading;
using System.Runtime.InteropServices;
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 " + ar.AsyncState);
}
public static int Main () {
SimpleDelegate d = new SimpleDelegate (F);
AsyncCallback ac = new AsyncCallback (async_callback);
string state1 = "STATE1";
string state2 = "STATE2";
string state3 = "STATE3";
string state4 = "STATE4";
int fin = 0;
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);
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;
}
}
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