Util/ExceptionHandlingThread.cs

   1 //
   2 // ExceptionHandlingThread.cs
   3 //
   4 // Copyright (C) 2005 Novell, Inc.
   5 //
   6
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining a
   9 // copy of this software and associated documentation files (the "Software"),
  10 // to deal in the Software without restriction, including without limitation
  11 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12 // and/or sell copies of the Software, and to permit persons to whom the
  13 // Software is furnished to do so, subject to the following conditions:
  14 //
  15 // The above copyright notice and this permission notice shall be included in
  16 // all copies or substantial portions of the Software.
  17 //
  18 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24 // DEALINGS IN THE SOFTWARE.
  25 //
  26
  27 using System;
  28 using System.Collections;
  29 using System.Runtime.InteropServices;
  30 using System.Threading;
  31
  32 namespace Beagle.Util {
  33
  34         public class ExceptionHandlingThread {
  35
  36                 private static ArrayList live_threads = new ArrayList ();
  37                 private Thread thread;
  38                 private ThreadStart method;
  39
  40                 private ExceptionHandlingThread (ThreadStart method)
  41                 {
  42                         if (method == null)
  43                                 throw new ArgumentNullException ("method");
  44
  45                         this.method = method;
  46                 }
  47
  48                 private void ThreadStarted ()
  49                 {
  50                         this.thread.Name = String.Format ("EHT {0:00000} {1}:{2}", wrap_gettid (), method.Target == null ? "(static)" : method.Target.ToString (), method.Method);
  51
  52                         try {
  53                                 this.method ();
  54                         } catch (ThreadAbortException e) {
  55                                 Logger.Log.Debug ("{0}:\n{1}\n", this.thread.Name, e.StackTrace);
  56                         } catch (Exception e) {
  57                                 Logger.Log.Warn ("Exception caught while executing {0}:{1}",
  58                                                  this.method.Target, this.method.Method);
  59                                 Logger.Log.Warn (e);
  60                         }
  61
  62                         lock (live_threads)
  63                                 live_threads.Remove (this.thread);
  64                 }
  65
  66                 public static Thread Start (ThreadStart method)
  67                 {
  68                         ExceptionHandlingThread eht = new ExceptionHandlingThread (method);
  69
  70                         eht.thread = new Thread (new ThreadStart (eht.ThreadStarted));
  71
  72                         lock (live_threads)
  73                                 live_threads.Add (eht.thread);
  74
  75                         eht.thread.Start ();
  76
  77                         return eht.thread;
  78                 }
  79
  80                 public static void SpewLiveThreads ()
  81                 {
  82                         bool have_live_thread = false;
  83
  84                         lock (live_threads) {
  85                                 foreach (Thread t in live_threads) {
  86                                         Logger.Log.Debug ("Live ExceptionHandlingThread: {0}", t.Name);
  87                                         have_live_thread = true;
  88                                 }
  89                         }
  90
  91                         if (! have_live_thread)
  92                                 Logger.Log.Debug ("No live ExceptionHandlingThreads!");
  93                 }
  94
  95                 public static void AbortThreads ()
  96                 {
  97                         ArrayList cancel_threads = null;
  98
  99                         // Copy the list to avoid recursively locking
 100                         lock (live_threads)
 101                                 cancel_threads = (ArrayList) live_threads.Clone ();
 102
 103                         foreach (Thread t in cancel_threads) {
 104                                 Logger.Log.Debug ("Aborting thread: {0}", t.Name);
 105                                 t.Abort ();
 106                         }
 107                 }
 108
 109                 [DllImport ("libbeagleglue")]
 110                 static extern uint wrap_gettid ();
 111         }
 112 }