2005-11-15 Zoltan Varga <vargaz@gmail.com>
[mono.git] / mcs / class / corlib / System.Runtime.CompilerServices / RuntimeHelpers.cs
1 // System.Runtime.CompilerServices.RuntimeHelpers
2 //
3 // Sean MacIsaac (macisaac@ximian.com)
4 // Paolo Molaro (lupus@ximian.com)
5 //
6 // (C) Ximian, Inc. 2001
7
8 //
9 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
10 //
11 // Permission is hereby granted, free of charge, to any person obtaining
12 // a copy of this software and associated documentation files (the
13 // "Software"), to deal in the Software without restriction, including
14 // without limitation the rights to use, copy, modify, merge, publish,
15 // distribute, sublicense, and/or sell copies of the Software, and to
16 // permit persons to whom the Software is furnished to do so, subject to
17 // the following conditions:
18 // 
19 // The above copyright notice and this permission notice shall be
20 // included in all copies or substantial portions of the Software.
21 // 
22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 //
30
31 #if NET_2_0
32 using System.Runtime.ConstrainedExecution;
33 #endif
34
35 namespace System.Runtime.CompilerServices
36 {
37 #if !NET_2_0
38         [Serializable]
39 #endif
40         public sealed class RuntimeHelpers
41         {
42 #if NET_2_0
43                 public delegate void TryCode (Object userData);
44
45                 public delegate void CleanupCode (Object userData, bool exceptionThrown);
46 #endif
47                 private RuntimeHelpers () {}
48
49                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
50                 static extern void InitializeArray (Array array, IntPtr fldHandle);
51
52                 public static void InitializeArray (Array array, RuntimeFieldHandle fldHandle)
53                 {
54                         InitializeArray (array, fldHandle.Value);
55                 }
56
57                 public static extern int OffsetToStringData {
58                         [MethodImpl (MethodImplOptions.InternalCall)]
59                         get;
60                 }
61
62 #if NET_1_1
63                 public static int GetHashCode (object o) {
64                         return Object.InternalGetHashCode (o);
65                 }
66
67                 public static new bool Equals (object o1, object o2) {
68                         // LAMESPEC: According to MSDN, this is equivalent to 
69                         // Object::Equals (). But the MS version of Object::Equals()
70                         // includes the functionality of ValueType::Equals(), while
71                         // our version does not.
72                         if (o1 == o2)
73                                 return true;
74                         if ((o1 == null) || (o2 == null))
75                                 return false;
76                         if (o1 is ValueType)
77                                 return ValueType.DefaultEquals (o1, o2);
78                         else
79                                 return Object.Equals (o1, o2);
80                 }
81 #endif
82
83                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
84                 public static extern object GetObjectValue (object obj);
85
86                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
87                 static extern void RunClassConstructor (IntPtr type);
88
89                 public static void RunClassConstructor (RuntimeTypeHandle type)
90                 {
91                         RunClassConstructor (type.Value);
92                 }
93
94 #if NET_2_0
95                 [MonoTODO]
96                 public static void ExecuteCodeWithGuaranteedCleanup (TryCode code, CleanupCode backoutCode, Object userData) {
97                         throw new NotImplementedException ();
98                 }
99
100                 [MonoTODO]
101                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
102                 public static void PrepareConstrainedRegions () {
103                         throw new NotImplementedException ();
104                 }
105
106                 [MonoTODO]
107                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
108                 public static void PrepareConstrainedRegionsNoOP () {
109                         throw new NotImplementedException ();
110                 }
111
112                 [MonoTODO]
113                 [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
114                 public static void ProbeForSufficientStack() {
115                         throw new NotImplementedException ();
116                 }
117
118                 [MonoTODO]
119                 public static void PrepareDelegate (Delegate d) {
120                         if (d == null)
121                                 throw new ArgumentNullException ("d");
122                         throw new NotImplementedException ();
123                 }
124
125                 [MonoTODO]
126                 public static void PrepareMethod (RuntimeMethodHandle method) {
127                         throw new NotImplementedException ();
128                 }
129
130                 [MonoTODO]
131                 public static void PrepareMethod (RuntimeMethodHandle method, RuntimeTypeHandle[] instantiation) {
132                         throw new NotImplementedException ();
133                 }
134
135                 [MonoTODO]
136                 public static void RunModuleConstructor (ModuleHandle module) {
137                         throw new NotImplementedException ();
138                 }
139 #endif
140         }
141 }