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 using System.Text;
  38
  39 namespace System
  40 {
  41         [ComVisible (true)]
  42         [Serializable]
  43         public struct RuntimeMethodHandle : ISerializable
  44         {
  45                 IntPtr value;
  46
  47                 internal RuntimeMethodHandle (IntPtr v)
  48                 {
  49                         value = v;
  50                 }
  51
  52                 RuntimeMethodHandle (SerializationInfo info, StreamingContext context)
  53                 {
  54                         if (info == null)
  55                                 throw new ArgumentNullException ("info");
  56
  57                         MonoMethod mm = ((MonoMethod) info.GetValue ("MethodObj", typeof (MonoMethod)));
  58                         value = mm.MethodHandle.Value;
  59                         if (value == IntPtr.Zero)
  60                                 throw new SerializationException (Locale.GetText ("Insufficient state."));
  61                 }
  62
  63                 public IntPtr Value {
  64                         get {
  65                                 return value;
  66                         }
  67                 }
  68
  69                 // This is from ISerializable
  70                 public void GetObjectData (SerializationInfo info, StreamingContext context)
  71                 {
  72                         if (info == null)
  73                                 throw new ArgumentNullException ("info");
  74
  75                         if (value == IntPtr.Zero)
  76                                 throw new SerializationException ("Object fields may not be properly initialized");
  77
  78                         info.AddValue ("MethodObj", (MonoMethod) MethodBase.GetMethodFromHandle (this), typeof (MonoMethod));
  79                 }
  80
  81                 [MethodImpl (MethodImplOptions.InternalCall)]
  82                 static extern IntPtr GetFunctionPointer (IntPtr m);
  83
  84                 [SecurityPermission (SecurityAction.Demand, UnmanagedCode = true)]
  85                 public IntPtr GetFunctionPointer ()
  86                 {
  87                         return GetFunctionPointer (value);
  88                 }
  89
  90                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
  91                 public override bool Equals (object obj)
  92                 {
  93                         if (obj == null || GetType () != obj.GetType ())
  94                                 return false;
  95
  96                         return value == ((RuntimeMethodHandle)obj).Value;
  97                 }
  98
  99                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 100                 public bool Equals (RuntimeMethodHandle handle)
 101                 {
 102                         return value == handle.Value;
 103                 }
 104
 105                 public override int GetHashCode ()
 106                 {
 107                         return value.GetHashCode ();
 108                 }
 109
 110                 public static bool operator == (RuntimeMethodHandle left, RuntimeMethodHandle right)
 111                 {
 112                         return left.Equals (right);
 113                 }
 114
 115                 public static bool operator != (RuntimeMethodHandle left, RuntimeMethodHandle right)
 116                 {
 117                         return !left.Equals (right);
 118                 }
 119
 120                 internal static string ConstructInstantiation (RuntimeMethodInfo method, TypeNameFormatFlags format)
 121                 {
 122                         var sb = new StringBuilder ();
 123                         var gen_params = method.GetGenericArguments ();
 124                         sb.Append ("[");
 125                         for (int j = 0; j < gen_params.Length; j++) {
 126                                 if (j > 0)
 127                                         sb.Append (",");
 128                                 sb.Append (gen_params [j].Name);
 129                         }
 130                         sb.Append ("]");
 131                         return sb.ToString ();
 132                 }
 133
 134                 internal bool IsNullHandle ()
 135                 {
 136                         return value == IntPtr.Zero;
 137                 }
 138         }
 139 }