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

   1 //
   2 // System.Threading.ThreadPool
   3 //
   4 // Author:
   5 //   Patrik Torstensson
   6 //   Dick Porter (dick@ximian.com)
   7 //   Maurer Dietmar (dietmar@ximian.com)
   8 //
   9 // (C) Ximian, Inc.  http://www.ximian.com
  10 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System.Collections;
  33 using System.Globalization;
  34 using System.Runtime.CompilerServices;
  35 using System.Runtime.Remoting.Messaging;
  36 using System.Security.Permissions;
  37
  38 namespace System.Threading {
  39
  40 #if NET_2_0
  41         public static class ThreadPool {
  42 #else
  43         public sealed class ThreadPool {
  44
  45                 private ThreadPool ()
  46                 {
  47                         /* nothing to do */
  48                 }
  49 #endif
  50                 public static bool BindHandle (IntPtr osHandle)
  51                 {
  52                         return true;
  53                 }
  54
  55                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  56                 public static extern void GetAvailableThreads (out int workerThreads, out int completionPortThreads);
  57
  58                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  59                 public static extern void GetMaxThreads (out int workerThreads, out int completionPortThreads);
  60
  61                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  62                 public static extern void GetMinThreads (out int workerThreads, out int completionPortThreads);
  63
  64                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  65                 [SecurityPermission (SecurityAction.Demand, ControlThread=true)]
  66                 public static extern bool SetMinThreads (int workerThreads, int completionPortThreads);
  67
  68                 public static bool QueueUserWorkItem (WaitCallback callback)
  69                 {
  70                         IAsyncResult ar = callback.BeginInvoke (null, null, null);
  71                         if (ar == null)
  72                                 return false;
  73                         return true;
  74                 }
  75
  76                 public static bool QueueUserWorkItem (WaitCallback callback, object state)
  77                 {
  78                         IAsyncResult ar = callback.BeginInvoke (state, null, null);
  79                         if (ar == null)
  80                                 return false;
  81                         return true;
  82                 }
  83
  84                 public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
  85                                                                                 WaitOrTimerCallback callBack,
  86                                                                                 object state,
  87                                                                                 int millisecondsTimeOutInterval,
  88                                                                                 bool executeOnlyOnce)
  89                 {
  90                         return RegisterWaitForSingleObject (waitObject, callBack, state,
  91                                                             (long) millisecondsTimeOutInterval, executeOnlyOnce);
  92                 }
  93
  94                 public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
  95                                                                                 WaitOrTimerCallback callBack,
  96                                                                                 object state,
  97                                                                                 long millisecondsTimeOutInterval,
  98                                                                                 bool executeOnlyOnce)
  99                 {
 100                         if (millisecondsTimeOutInterval < -1)
 101                                 throw new ArgumentOutOfRangeException ("timeout", "timeout < -1");
 102
 103                         if (millisecondsTimeOutInterval > Int32.MaxValue)
 104                                 throw new NotSupportedException ("Timeout is too big. Maximum is Int32.MaxValue");
 105
 106                         TimeSpan timeout = new TimeSpan (0, 0, 0, 0, (int) millisecondsTimeOutInterval);
 107
 108                         RegisteredWaitHandle waiter = new RegisteredWaitHandle (waitObject, callBack, state,
 109                                                                                 timeout, executeOnlyOnce);
 110                         QueueUserWorkItem (new WaitCallback (waiter.Wait), null);
 111                         return waiter;
 112                 }
 113
 114                 public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
 115                                                                                 WaitOrTimerCallback callBack,
 116                                                                                 object state,
 117                                                                                 TimeSpan timeout,
 118                                                                                 bool executeOnlyOnce)
 119                 {
 120                         return RegisterWaitForSingleObject (waitObject, callBack, state,
 121                                                             (long) timeout.TotalMilliseconds, executeOnlyOnce);
 122
 123                 }
 124
 125                 [CLSCompliant(false)]
 126                 public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
 127                                                                                 WaitOrTimerCallback callBack,
 128                                                                                 object state,
 129                                                                                 uint millisecondsTimeOutInterval,
 130                                                                                 bool executeOnlyOnce)
 131                 {
 132                         return RegisterWaitForSingleObject (waitObject, callBack, state,
 133                                                             (long) millisecondsTimeOutInterval, executeOnlyOnce);
 134                 }
 135
 136                 [SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
 137                 public static bool UnsafeQueueUserWorkItem (WaitCallback callback, object state)
 138                 {
 139                         // no stack propagation here (that's why it's unsafe and requires extra security permissions)
 140                         IAsyncResult ar = null;
 141                         try {
 142                                 if (!ExecutionContext.IsFlowSuppressed ())
 143                                         ExecutionContext.SuppressFlow (); // on current thread only
 144
 145                                 ar = callback.BeginInvoke (state, null, null);
 146                         }
 147                         finally {
 148                                 if (ExecutionContext.IsFlowSuppressed ())
 149                                         ExecutionContext.RestoreFlow ();
 150                         }
 151                         return (ar != null);
 152                 }
 153
 154                 [MonoTODO]
 155                 [SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
 156                 public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
 157                         WaitOrTimerCallback callBack, object state, int millisecondsTimeOutInterval,
 158                         bool executeOnlyOnce)
 159                 {
 160                         throw new NotImplementedException ();
 161                 }
 162
 163                 [MonoTODO]
 164                 [SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
 165                 public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
 166                         WaitOrTimerCallback callBack, object state, long millisecondsTimeOutInterval,
 167                         bool executeOnlyOnce)
 168                 {
 169                         throw new NotImplementedException ();
 170                 }
 171
 172                 [MonoTODO]
 173                 [SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
 174                 public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
 175                         WaitOrTimerCallback callBack, object state, TimeSpan timeout,
 176                         bool executeOnlyOnce)
 177                 {
 178                         throw new NotImplementedException ();
 179                 }
 180
 181                 [MonoTODO]
 182                 [CLSCompliant (false)]
 183                 [SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
 184                 public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
 185                         WaitOrTimerCallback callBack, object state, uint millisecondsTimeOutInterval,
 186                         bool executeOnlyOnce)
 187                 {
 188                         throw new NotImplementedException ();
 189                 }
 190         }
 191 }