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

   1 //
   2 // System.Threading.Interlocked.cs
   3 //
   4 // Author:
   5 //        Patrik Torstensson (patrik.torstensson@labs2.com)
   6 //   Dick Porter (dick@ximian.com)
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 //
  12 // Copyright (C) 2004, 2005 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.Runtime.CompilerServices;
  36 using System.Runtime.InteropServices;
  37
  38 #if NET_2_0
  39 using System.Runtime.ConstrainedExecution;
  40 #endif
  41
  42 namespace System.Threading
  43 {
  44         public
  45 #if NET_2_0
  46         static
  47 #else
  48         sealed
  49 #endif
  50         class Interlocked
  51         {
  52
  53 #if !NET_2_0
  54                 private Interlocked () {}
  55 #endif
  56
  57 #if NET_2_0
  58                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  59 #endif
  60                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  61                 public extern static int CompareExchange(ref int location1, int value, int comparand);
  62
  63 #if NET_2_0
  64                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  65 #endif
  66                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  67                 public extern static object CompareExchange(ref object location1, object value, object comparand);
  68
  69                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  70                 public extern static float CompareExchange(ref float location1, float value, float comparand);
  71
  72 #if NET_2_0
  73                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  74 #endif
  75                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  76                 public extern static int Decrement(ref int location);
  77
  78                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  79                 public extern static long Decrement(ref long location);
  80
  81 #if NET_2_0
  82                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  83 #endif
  84                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  85                 public extern static int Increment(ref int location);
  86
  87                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  88                 public extern static long Increment(ref long location);
  89
  90 #if NET_2_0
  91                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  92 #endif
  93                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  94                 public extern static int Exchange(ref int location1, int value);
  95
  96 #if NET_2_0
  97                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  98 #endif
  99                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 100                 public extern static object Exchange(ref object location1, object value);
 101
 102                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 103                 public extern static float Exchange(ref float location1, float value);
 104
 105 #if NET_2_0
 106                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 107                 public extern static long CompareExchange(ref long location1, long value, long comparand);
 108
 109                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 110                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 111                 public extern static IntPtr CompareExchange(ref IntPtr location1, IntPtr value, IntPtr comparand);
 112
 113                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 114                 public extern static double CompareExchange(ref double location1, double value, double comparand);
 115
 116                 [ComVisible (false)]
 117                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 118                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
 119                 public extern static T CompareExchange<T> (ref T location, T value, T comparand) where T:class;
 120
 121                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 122                 public extern static long Exchange(ref long location1, long value);
 123
 124                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 125                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 126                 public extern static IntPtr Exchange(ref IntPtr location1, IntPtr value);
 127
 128                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 129                 public extern static double Exchange(ref double location1, double value);
 130
 131                 [ComVisible (false)]
 132                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 133                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
 134                 public extern static T Exchange<T> (ref T location1, T value) where T:class;
 135
 136                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 137                 public extern static long Read(ref long location1);
 138
 139                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 140                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 141                 public extern static int Add(ref int location1, int add);
 142
 143                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 144                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 145                 public extern static long Add(ref long location1, long add);
 146 #endif
 147         }
 148 }
 149