mcs/class/corlib/System.Threading/SynchronizationContext.cs

   1 //
   2 // System.Threading.SynchronizationContext.cs
   3 //
   4 // Author:
   5 //   Lluis Sanchez (lluis@novell.com)
   6 //
   7 // Copyright (C) 2004-2005 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 #if NET_2_0
  30
  31 using System.Runtime.ConstrainedExecution;
  32 using System.Runtime.InteropServices;
  33
  34 namespace System.Threading
  35 {
  36         public class SynchronizationContext
  37         {
  38                 bool notification_required;
  39
  40                 [ThreadStatic]
  41                 static SynchronizationContext currentContext;
  42
  43                 public SynchronizationContext ()
  44                 {
  45                 }
  46
  47                 internal SynchronizationContext (SynchronizationContext context)
  48                 {
  49                         currentContext = context;
  50                 }
  51
  52                 public static SynchronizationContext Current
  53                 {
  54                         get { return currentContext; }
  55                 }
  56
  57                 public virtual SynchronizationContext CreateCopy ()
  58                 {
  59                         return new SynchronizationContext (this);
  60                 }
  61
  62                 public bool IsWaitNotificationRequired ()
  63                 {
  64                         return notification_required;
  65                 }
  66
  67                 public virtual void OperationCompleted ()
  68                 {
  69                 }
  70
  71                 public virtual void OperationStarted ()
  72                 {
  73                 }
  74
  75                 public virtual void Post (SendOrPostCallback d, object state)
  76                 {
  77                         ThreadPool.QueueUserWorkItem (new WaitCallback (d), state);
  78                 }
  79
  80                 public virtual void Send (SendOrPostCallback d, object state)
  81                 {
  82                         d (state);
  83                 }
  84
  85                 public static void SetSynchronizationContext (SynchronizationContext syncContext)
  86                 {
  87                         currentContext = syncContext;
  88                 }
  89
  90                 [MonoTODO]
  91                 protected void SetWaitNotificationRequired ()
  92                 {
  93                         notification_required = true;
  94                         throw new NotImplementedException ();
  95                 }
  96
  97                 [CLSCompliant (false)]
  98                 [PrePrepareMethod ()]
  99                 public virtual int Wait (IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
 100                 {
 101                         return WaitHelper (waitHandles, waitAll, millisecondsTimeout);
 102                 }
 103
 104                 [MonoTODO]
 105                 [CLSCompliant (false)]
 106                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
 107                 [PrePrepareMethod ()]
 108                 protected static int WaitHelper (IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout)
 109                 {
 110                         throw new NotImplementedException ();
 111                 }
 112         }
 113 }
 114
 115 #endif