mono/tests/async_read.cs

   1 using System;
   2 using System.IO;
   3 using System.Threading;
   4
   5 class Test {
   6
   7         static int sum = 0;
   8         static int count = 0;
   9
  10         static void async_callback (IAsyncResult ar)
  11         {
  12                 byte [] buf = (byte [])ar.AsyncState;
  13                 Interlocked.Add (ref sum, buf [0]);
  14                 Interlocked.Increment (ref count);
  15         }
  16
  17         static int Main () {
  18                 byte [] buf = new byte [1];
  19                 AsyncCallback ac = new AsyncCallback (async_callback);
  20                 IAsyncResult ar;
  21                 int sum0 = 0;
  22                 int count0 = 0;
  23
  24                 FileStream s = new FileStream ("async_read.exe",  FileMode.Open, FileAccess.Read);
  25
  26                 s.Position = 0;
  27                 while (s.Read (buf, 0, 1) == 1) {
  28                         sum0 += buf [0];
  29                         count0 ++;
  30                 }
  31
  32                 s.Position = 0;
  33
  34                 do {
  35                         buf = new byte [1];
  36                         ar = s.BeginRead (buf, 0, 1, ac, buf);
  37                 } while (s.EndRead (ar) == 1);
  38
  39                 Thread.Sleep (100);
  40
  41                 s.Close ();
  42
  43                 count0 ++;  // async_callback is invoked for the "finished reading" case too
  44                 Console.WriteLine ("CSUM: " + sum + " " + sum0);
  45                 Console.WriteLine ("Count: " + count + " " + count0);
  46                 if (sum != sum0 || count != count0)
  47                         return 1;
  48
  49                 return 0;
  50         }
  51 }