main/src/addins/Mono.Texteditor/Mono.TextEditor.Highlighting/WorkerThread.cs

   1 //
   2 // WorkerThread.cs
   3 //
   4 // Author:
   5 //   Mike Krüger <mkrueger@novell.com>
   6 //
   7 // Copyright (C) 2008 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 using System;
  30 using System.Threading;
  31
  32 namespace Mono.TextEditor
  33 {
  34         public abstract class WorkerThread
  35         {
  36                 readonly object syncObject = new object();
  37
  38                 bool isStopping = false;
  39                 bool isStopped  = false;
  40
  41                 public bool IsStopping {
  42                         get {
  43                                 lock (syncObject) {
  44                                         return isStopping;
  45                                 }
  46                         }
  47                 }
  48
  49                 public bool IsStopped {
  50                         get {
  51                                 lock (syncObject) {
  52                                         return isStopped;
  53                                 }
  54                         }
  55                 }
  56 //              Thread thread;
  57
  58                 public void Start ()
  59                 {
  60                         ThreadPool.QueueUserWorkItem (new WaitCallback (Run));
  61 /*
  62                         thread = new Thread (new ThreadStart (Run));
  63                         thread.Priority = ThreadPriority.Lowest;
  64                         thread.IsBackground = true;
  65                         thread.Start ();*/
  66                 }
  67
  68                 public void Stop ()
  69                 {
  70                         lock (syncObject) {
  71                                 isStopping = true;
  72                         }
  73                 }
  74
  75                 public void WaitForFinish ()
  76                 {
  77                         int i = 0;
  78                         while (i < 100 && !IsStopped) {
  79                                 Thread.Sleep (10);
  80                                 i++;
  81                         }
  82                         //if (thread != null && !IsStopped)
  83                         //      thread.Join (500);
  84                 }
  85
  86                 void SetStopped ()
  87                 {
  88                         lock (syncObject) {
  89                                 isStopped = true;
  90                         }
  91                 }
  92
  93                 protected abstract void InnerRun ();
  94
  95                 void Run (object stateInfo)
  96                 {
  97                         try {
  98                                 while (!IsStopping) {
  99                                         InnerRun ();
 100                                 }
 101                         } catch (Exception ex) {
 102                                 System.Console.WriteLine ("Exception in highlighting worker thread:", ex);
 103                         } finally {
 104                                 SetStopped ();
 105                         }
 106                 }
 107         }
 108 }