2 // System.Threading.Interlocked.cs
5 // Patrik Torstensson (patrik.torstensson@labs2.com)
6 // Dick Porter (dick@ximian.com)
8 // (C) Ximian, Inc. http://www.ximian.com
12 // Copyright (C) 2004, 2005 Novell, Inc (http://www.novell.com)
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:
22 // The above copyright notice and this permission notice shall be
23 // included in all copies or substantial portions of the Software.
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.
35 using System.Runtime.CompilerServices;
36 using System.Runtime.InteropServices;
39 using System.Runtime.ConstrainedExecution;
42 namespace System.Threading
54 private Interlocked () {}
58 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
60 [MethodImplAttribute(MethodImplOptions.InternalCall)]
61 public extern static int CompareExchange(ref int location1, int value, int comparand);
64 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
66 [MethodImplAttribute(MethodImplOptions.InternalCall)]
67 public extern static object CompareExchange(ref object location1, object value, object comparand);
69 [MethodImplAttribute(MethodImplOptions.InternalCall)]
70 public extern static float CompareExchange(ref float location1, float value, float comparand);
73 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
75 [MethodImplAttribute(MethodImplOptions.InternalCall)]
76 public extern static int Decrement(ref int location);
78 [MethodImplAttribute(MethodImplOptions.InternalCall)]
79 public extern static long Decrement(ref long location);
82 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
84 [MethodImplAttribute(MethodImplOptions.InternalCall)]
85 public extern static int Increment(ref int location);
87 [MethodImplAttribute(MethodImplOptions.InternalCall)]
88 public extern static long Increment(ref long location);
91 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
93 [MethodImplAttribute(MethodImplOptions.InternalCall)]
94 public extern static int Exchange(ref int location1, int value);
97 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
99 [MethodImplAttribute(MethodImplOptions.InternalCall)]
100 public extern static object Exchange(ref object location1, object value);
102 [MethodImplAttribute(MethodImplOptions.InternalCall)]
103 public extern static float Exchange(ref float location1, float value);
106 [MethodImplAttribute(MethodImplOptions.InternalCall)]
107 public extern static long CompareExchange(ref long location1, long value, long comparand);
109 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
110 [MethodImplAttribute(MethodImplOptions.InternalCall)]
111 public extern static IntPtr CompareExchange(ref IntPtr location1, IntPtr value, IntPtr comparand);
113 [MethodImplAttribute(MethodImplOptions.InternalCall)]
114 public extern static double CompareExchange(ref double location1, double value, double comparand);
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;
121 [MethodImplAttribute(MethodImplOptions.InternalCall)]
122 public extern static long Exchange(ref long location1, long value);
124 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
125 [MethodImplAttribute(MethodImplOptions.InternalCall)]
126 public extern static IntPtr Exchange(ref IntPtr location1, IntPtr value);
128 [MethodImplAttribute(MethodImplOptions.InternalCall)]
129 public extern static double Exchange(ref double location1, double value);
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;
136 [MethodImplAttribute(MethodImplOptions.InternalCall)]
137 public extern static long Read(ref long location1);
139 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
140 [MethodImplAttribute(MethodImplOptions.InternalCall)]
141 public extern static int Add(ref int location1, int add);
143 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
144 [MethodImplAttribute(MethodImplOptions.InternalCall)]
145 public extern static long Add(ref long location1, long add);