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 using System.Runtime.ConstrainedExecution;
  37
  38 namespace System
  39 {
  40         [ComVisible (true)]
  41         [Serializable]
  42         public struct RuntimeMethodHandle : ISerializable
  43         {
  44                 IntPtr value;
  45
  46                 internal RuntimeMethodHandle (IntPtr v)
  47                 {
  48                         value = v;
  49                 }
  50
  51                 RuntimeMethodHandle (SerializationInfo info, StreamingContext context)
  52                 {
  53                         if (info == null)
  54                                 throw new ArgumentNullException ("info");
  55
  56                         MonoMethod mm = ((MonoMethod) info.GetValue ("MethodObj", typeof (MonoMethod)));
  57                         value = mm.MethodHandle.Value;
  58                         if (value == IntPtr.Zero)
  59                                 throw new SerializationException (Locale.GetText ("Insufficient state."));
  60                 }
  61
  62                 public IntPtr Value {
  63                         get {
  64                                 return value;
  65                         }
  66                 }
  67
  68                 // This is from ISerializable
  69                 public void GetObjectData (SerializationInfo info, StreamingContext context)
  70                 {
  71                         if (info == null)
  72                                 throw new ArgumentNullException ("info");
  73
  74                         if (value == IntPtr.Zero)
  75                                 throw new SerializationException ("Object fields may not be properly initialized");
  76
  77                         info.AddValue ("MethodObj", (MonoMethod) MethodBase.GetMethodFromHandle (this), typeof (MonoMethod));
  78                 }
  79
  80                 [MethodImpl (MethodImplOptions.InternalCall)]
  81                 static extern IntPtr GetFunctionPointer (IntPtr m);
  82
  83                 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
  84                 public IntPtr GetFunctionPointer ()
  85                 {
  86                         return GetFunctionPointer (value);
  87                 }
  88
  89                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  90                 public override bool Equals (object obj)
  91                 {
  92                         if (obj == null || GetType () != obj.GetType ())
  93                                 return false;
  94
  95                         return value == ((RuntimeMethodHandle)obj).Value;
  96                 }
  97
  98                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  99                 public bool Equals (RuntimeMethodHandle handle)
 100                 {
 101                         return value == handle.Value;
 102                 }
 103
 104                 public override int GetHashCode ()
 105                 {
 106                         return value.GetHashCode ();
 107                 }
 108
 109                 public static bool operator == (RuntimeMethodHandle left, RuntimeMethodHandle right)
 110                 {
 111                         return left.Equals (right);
 112                 }
 113
 114                 public static bool operator != (RuntimeMethodHandle left, RuntimeMethodHandle right)
 115                 {
 116                         return !left.Equals (right);
 117                 }
 118         }
 119 }