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;
37 using System.Runtime.ConstrainedExecution;
39 namespace System.Threading
41 public static class Interlocked
43 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
44 [MethodImplAttribute(MethodImplOptions.InternalCall)]
45 public extern static int CompareExchange(ref int location1, int value, int comparand);
47 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
48 [MethodImplAttribute(MethodImplOptions.InternalCall)]
49 public extern static object CompareExchange(ref object location1, object value, object comparand);
51 [MethodImplAttribute(MethodImplOptions.InternalCall)]
52 public extern static float CompareExchange(ref float location1, float value, float comparand);
54 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
55 [MethodImplAttribute(MethodImplOptions.InternalCall)]
56 public extern static int Decrement(ref int location);
58 [MethodImplAttribute(MethodImplOptions.InternalCall)]
59 public extern static long Decrement(ref long location);
61 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
62 [MethodImplAttribute(MethodImplOptions.InternalCall)]
63 public extern static int Increment(ref int location);
65 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
66 [MethodImplAttribute(MethodImplOptions.InternalCall)]
67 public extern static long Increment(ref long location);
69 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
70 [MethodImplAttribute(MethodImplOptions.InternalCall)]
71 public extern static int Exchange(ref int location1, int value);
73 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
74 [MethodImplAttribute(MethodImplOptions.InternalCall)]
75 public extern static object Exchange(ref object location1, object value);
77 [MethodImplAttribute(MethodImplOptions.InternalCall)]
78 public extern static float Exchange(ref float location1, float value);
80 [MethodImplAttribute(MethodImplOptions.InternalCall)]
81 public extern static long CompareExchange(ref long location1, long value, long comparand);
83 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
84 [MethodImplAttribute(MethodImplOptions.InternalCall)]
85 public extern static IntPtr CompareExchange(ref IntPtr location1, IntPtr value, IntPtr comparand);
87 [MethodImplAttribute(MethodImplOptions.InternalCall)]
88 public extern static double CompareExchange(ref double location1, double value, double comparand);
91 [MethodImplAttribute(MethodImplOptions.InternalCall)]
92 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
93 public extern static T CompareExchange<T> (ref T location1, T value, T comparand) where T:class;
95 [MethodImplAttribute(MethodImplOptions.InternalCall)]
96 public extern static long Exchange(ref long location1, long value);
98 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
99 [MethodImplAttribute(MethodImplOptions.InternalCall)]
100 public extern static IntPtr Exchange(ref IntPtr location1, IntPtr value);
102 [MethodImplAttribute(MethodImplOptions.InternalCall)]
103 public extern static double Exchange(ref double location1, double value);
106 [MethodImplAttribute(MethodImplOptions.InternalCall)]
107 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
108 public extern static T Exchange<T> (ref T location1, T value) where T:class;
110 [MethodImplAttribute(MethodImplOptions.InternalCall)]
111 public extern static long Read(ref long location);
113 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
114 [MethodImplAttribute(MethodImplOptions.InternalCall)]
115 public extern static int Add(ref int location1, int value);
117 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
118 [MethodImplAttribute(MethodImplOptions.InternalCall)]
119 public extern static long Add(ref long location1, long value);
122 public static void MemoryBarrier () {
123 Thread.MemoryBarrier ();