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