mcs/class/corlib/System/ModuleHandle.cs

   1 //
   2 // System.ModuleHandle.cs
   3 //
   4 // Author:
   5 //   Zoltan Varga (vargaz@gmail.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System.Reflection;
  34 using System.Runtime.Serialization;
  35 using System.Runtime.CompilerServices;
  36 using System.Runtime.InteropServices;
  37
  38 #if NET_2_0
  39
  40 using System.Runtime.ConstrainedExecution;
  41
  42 namespace System
  43 {
  44         [ComVisible (true)]
  45         public struct ModuleHandle
  46         {
  47                 IntPtr value;
  48
  49                 public static readonly ModuleHandle EmptyHandle = new ModuleHandle (IntPtr.Zero);
  50
  51                 internal ModuleHandle (IntPtr v)
  52                 {
  53                         value = v;
  54                 }
  55
  56                 internal IntPtr Value {
  57                         get {
  58                                 return value;
  59                         }
  60                 }
  61
  62                 internal void GetPEKind (out PortableExecutableKinds peKind, out ImageFileMachine machine)
  63                 {
  64                         if (value == IntPtr.Zero)
  65                                 throw new ArgumentNullException (String.Empty, "Invalid handle");
  66                         Module.GetPEKind (value, out peKind, out machine);
  67                 }
  68
  69                 public RuntimeFieldHandle ResolveFieldHandle (int fieldToken)
  70                 {
  71                         ResolveTokenError error;
  72                         if (value == IntPtr.Zero)
  73                                 throw new ArgumentNullException (String.Empty, "Invalid handle");
  74                         IntPtr res = Module.ResolveFieldToken (value, fieldToken, out error);
  75                         if (res == IntPtr.Zero)
  76                                 throw new Exception (String.Format ("Could not load field '0x{0:x}' from assembly '0x{1:x}'", fieldToken, value.ToInt64 ()));
  77                         else
  78                                 return new RuntimeFieldHandle (res);
  79                 }
  80
  81                 public RuntimeMethodHandle ResolveMethodHandle (int methodToken)
  82                 {
  83                         ResolveTokenError error;
  84                         if (value == IntPtr.Zero)
  85                                 throw new ArgumentNullException (String.Empty, "Invalid handle");
  86                         IntPtr res = Module.ResolveMethodToken (value, methodToken, out error);
  87                         if (res == IntPtr.Zero)
  88                                 throw new Exception (String.Format ("Could not load method '0x{0:x}' from assembly '0x{1:x}'", methodToken, value.ToInt64 ()));
  89                         else
  90                                 return new RuntimeMethodHandle (res);
  91                 }
  92
  93                 public RuntimeTypeHandle ResolveTypeHandle (int typeToken)
  94                 {
  95                         ResolveTokenError error;
  96                         if (value == IntPtr.Zero)
  97                                 throw new ArgumentNullException (String.Empty, "Invalid handle");
  98                         IntPtr res = Module.ResolveTypeToken (value, typeToken, out error);
  99                         if (res == IntPtr.Zero)
 100                                 throw new TypeLoadException (String.Format ("Could not load type '0x{0:x}' from assembly '0x{1:x}'", typeToken, value.ToInt64 ()));
 101                         else
 102                                 return new RuntimeTypeHandle (res);
 103                 }
 104
 105                 public RuntimeFieldHandle GetRuntimeFieldHandleFromMetadataToken (int fieldToken) {
 106                         return ResolveFieldHandle (fieldToken);
 107                 }
 108
 109                 public RuntimeMethodHandle GetRuntimeMethodHandleFromMetadataToken (int methodToken)
 110                 {
 111                         return ResolveMethodHandle (methodToken);
 112                 }
 113
 114                 public RuntimeTypeHandle GetRuntimeTypeHandleFromMetadataToken (int typeToken)
 115                 {
 116                         return ResolveTypeHandle (typeToken);
 117                 }
 118
 119 #if NET_2_0
 120                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 121 #endif
 122                 public override bool Equals (object obj)
 123                 {
 124                         if (obj == null || GetType () != obj.GetType ())
 125                                 return false;
 126
 127                         return value == ((ModuleHandle)obj).Value;
 128                 }
 129
 130 #if NET_2_0
 131                 [ReliabilityContractAttribute (Consistency.WillNotCorruptState, Cer.Success)]
 132 #endif
 133                 public bool Equals (ModuleHandle handle)
 134                 {
 135                         return value == handle.Value;
 136                 }
 137
 138                 public override int GetHashCode ()
 139                 {
 140                         return value.GetHashCode ();
 141                 }
 142         }
 143 }
 144
 145 #endif