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