mcs/class/corlib/System/RuntimeMethodHandle.cs

   1 //
   2 // System.RuntimeMethodHandle.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //   Andreas Nahr (ClassDevelopment@A-SoftTech.com)
   7 //
   8 // (C) Ximian, Inc.  http://www.ximian.com
   9 // Copyright (C) 2004-2005 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 using System.Reflection;
  32 using System.Runtime.Serialization;
  33 using System.Runtime.CompilerServices;
  34 using System.Runtime.InteropServices;
  35 using System.Security.Permissions;
  36
  37 #if NET_2_0
  38 using System.Runtime.ConstrainedExecution;
  39 #endif
  40
  41 namespace System
  42 {
  43 #if NET_2_0
  44         [ComVisible (true)]
  45 #endif
  46         [MonoTODO ("Serialization needs tests")]
  47         [Serializable]
  48         public struct RuntimeMethodHandle : ISerializable
  49         {
  50                 IntPtr value;
  51
  52                 internal RuntimeMethodHandle (IntPtr v)
  53                 {
  54                         value = v;
  55                 }
  56
  57                 RuntimeMethodHandle (SerializationInfo info, StreamingContext context)
  58                 {
  59                         if (info == null)
  60                                 throw new ArgumentNullException ("info");
  61
  62                         MonoMethod mm = ((MonoMethod) info.GetValue ("MethodObj", typeof (MonoMethod)));
  63                         value = mm.MethodHandle.Value;
  64                         if (value == IntPtr.Zero)
  65                                 throw new SerializationException (Locale.GetText ("Insufficient state."));
  66                 }
  67
  68                 public IntPtr Value {
  69                         get {
  70                                 return value;
  71                         }
  72                 }
  73
  74                 // This is from ISerializable
  75                 public void GetObjectData (SerializationInfo info, StreamingContext context)
  76                 {
  77                         if (info == null)
  78                                 throw new ArgumentNullException ("info");
  79
  80                         info.AddValue ("MethodObj", (MonoMethod) MethodBase.GetMethodFromHandle (this), typeof (MonoMethod));
  81                 }
  82
  83                 [MethodImpl (MethodImplOptions.InternalCall)]
  84                 static extern IntPtr GetFunctionPointer (IntPtr m);
  85
  86                 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
  87                 public IntPtr GetFunctionPointer ()
  88                 {
  89                         return GetFunctionPointer (value);
  90                 }
  91
  92 #if NET_2_0
  93                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  94                 public override bool Equals (object obj)
  95                 {
  96                         if (obj == null || GetType () != obj.GetType ())
  97                                 return false;
  98
  99                         return value == ((RuntimeMethodHandle)obj).Value;
 100                 }
 101
 102                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 103                 public bool Equals (RuntimeMethodHandle handle)
 104                 {
 105                         return value == handle.Value;
 106                 }
 107
 108                 public override int GetHashCode ()
 109                 {
 110                         return value.GetHashCode ();
 111                 }
 112
 113                 public static bool operator == (RuntimeMethodHandle left, RuntimeMethodHandle right)
 114                 {
 115                         return left.Equals (right);
 116                 }
 117
 118                 public static bool operator != (RuntimeMethodHandle left, RuntimeMethodHandle right)
 119                 {
 120                         return !left.Equals (right);
 121                 }
 122 #endif
 123         }
 124 }