mcs/class/corlib/System/MonoType.cs

   1 //
   2 // System.MonoType
   3 //
   4 // Authors:
   5 //      Sean MacIsaac (macisaac@ximian.com)
   6 //      Paolo Molaro (lupus@ximian.com)
   7 //      Patrik Torstensson (patrik.torstensson@labs2.com)
   8 //      Gonzalo Paniagua (gonzalo@ximian.com)
   9 //  Marek Safar (marek.safar@gmail.com)
  10 //
  11 // (c) 2001-2003 Ximian, Inc.
  12 // Copyright (C) 2003-2005 Novell, Inc (http://www.novell.com)
  13 // Copyright (C) 2013 Xamarin Inc (http://www.xamarin.com)
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System.Collections.Generic;
  36 using System.Globalization;
  37 using System.Reflection;
  38 using System.Runtime.InteropServices;
  39 using System.Runtime.CompilerServices;
  40 using System.Runtime.Serialization;
  41 using System.Security;
  42 using System.Diagnostics.Contracts;
  43 using System.Threading;
  44 using System.Diagnostics;
  45 using System.Security.Permissions;
  46 using System.Runtime.Remoting.Activation;
  47 using System.Runtime;
  48
  49 namespace System
  50 {
  51         // Contains information about the type which is expensive to compute
  52         [StructLayout (LayoutKind.Sequential)]
  53         internal class MonoTypeInfo {
  54                 public string full_name;
  55                 public MonoCMethod default_ctor;
  56         }
  57
  58         [Serializable]
  59         [StructLayout (LayoutKind.Sequential)]
  60         class MonoType : RuntimeType, ISerializable
  61         {
  62                 [NonSerialized]
  63                 MonoTypeInfo type_info;
  64
  65                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
  66                 private static extern void type_from_obj (MonoType type, Object obj);
  67
  68                 internal MonoType (Object obj)
  69                 {
  70                         // this should not be used - lupus
  71                         type_from_obj (this, obj);
  72
  73                         throw new NotImplementedException ();
  74                 }
  75
  76                 internal override MonoCMethod GetDefaultConstructor ()
  77                 {
  78                         MonoCMethod ctor = null;
  79
  80                         if (type_info == null)
  81                                 type_info = new MonoTypeInfo ();
  82                         else
  83                                 ctor = type_info.default_ctor;
  84
  85                         if (ctor == null) {
  86                                 var ctors = GetConstructors (BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.DeclaredOnly);
  87
  88                                 for (int i = 0; i < ctors.Length; ++i) {
  89                                         if (ctors [i].GetParametersCount () == 0) {
  90                                                 type_info.default_ctor = ctor = (MonoCMethod) ctors [i];
  91                                                 break;
  92                                         }
  93                                 }
  94                         }
  95
  96                         return ctor;
  97                 }
  98
  99                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 100                 extern MethodInfo GetCorrespondingInflatedMethod (MethodInfo generic);
 101
 102                 [MethodImplAttribute(MethodImplOptions.InternalCall)]
 103                 extern ConstructorInfo GetCorrespondingInflatedConstructor (ConstructorInfo generic);
 104
 105                 internal override MethodInfo GetMethod (MethodInfo fromNoninstanciated)
 106                 {
 107                         if (fromNoninstanciated == null)
 108                                 throw new ArgumentNullException ("fromNoninstanciated");
 109                         return GetCorrespondingInflatedMethod (fromNoninstanciated);
 110                 }
 111
 112                 internal override ConstructorInfo GetConstructor (ConstructorInfo fromNoninstanciated)
 113                 {
 114                         if (fromNoninstanciated == null)
 115                                 throw new ArgumentNullException ("fromNoninstanciated");
 116                         return GetCorrespondingInflatedConstructor (fromNoninstanciated);
 117                 }
 118
 119                 internal override FieldInfo GetField (FieldInfo fromNoninstanciated)
 120                 {
 121                         /* create sensible flags from given FieldInfo */
 122                         BindingFlags flags = fromNoninstanciated.IsStatic ? BindingFlags.Static : BindingFlags.Instance;
 123                         flags |= fromNoninstanciated.IsPublic ? BindingFlags.Public : BindingFlags.NonPublic;
 124                         return GetField (fromNoninstanciated.Name, flags);
 125                 }
 126
 127                 public override int GetHashCode()
 128                 {
 129                         Type t = UnderlyingSystemType;
 130                         if (t != null && t != this)
 131                                 return t.GetHashCode ();
 132                         return (int)_impl.Value;
 133                 }
 134
 135                 public override string FullName {
 136                         get {
 137                                 string fullName;
 138                                 // This doesn't need locking
 139                                 if (type_info == null)
 140                                         type_info = new MonoTypeInfo ();
 141                                 if ((fullName = type_info.full_name) == null)
 142                                         fullName = type_info.full_name = getFullName (true, false);
 143
 144                                 return fullName;
 145                         }
 146                 }
 147
 148                 internal override bool IsUserType {
 149                         get {
 150                                 return false;
 151                         }
 152                 }
 153         }
 154 }