mcs/class/corlib/System.Reflection.Emit/UnmanagedMarshal.cs

   1
   2 //
   3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 //
  26 // System.Reflection.Emit/UnmanagedMarshal.cs
  27 //
  28 // Author:
  29 //   Paolo Molaro (lupus@ximian.com)
  30 //
  31 // (C) 2001-2002 Ximian, Inc.  http://www.ximian.com
  32 //
  33
  34 #if !FULL_AOT_RUNTIME
  35 using System.Reflection.Emit;
  36 using System.Runtime.InteropServices;
  37 using System;
  38
  39 namespace System.Reflection.Emit {
  40
  41         [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
  42         [ComVisible (true)]
  43         [Serializable]
  44         [StructLayout (LayoutKind.Sequential)]
  45         public sealed class UnmanagedMarshal {
  46 #pragma warning disable 169, 414
  47                 private int count;
  48                 private UnmanagedType t;
  49                 private UnmanagedType tbase;
  50                 string guid;
  51                 string mcookie;
  52                 string marshaltype;
  53                 Type marshaltyperef;
  54                 private int param_num;
  55                 private bool has_size;
  56 #pragma warning restore 169, 414
  57
  58                 private UnmanagedMarshal (UnmanagedType maint, int cnt) {
  59                         count = cnt;
  60                         t = maint;
  61                         tbase = maint;
  62                 }
  63                 private UnmanagedMarshal (UnmanagedType maint, UnmanagedType elemt) {
  64                         count = 0;
  65                         t = maint;
  66                         tbase = elemt;
  67                 }
  68
  69                 public UnmanagedType BaseType {
  70                         get {
  71                                 if (t == UnmanagedType.LPArray || t == UnmanagedType.SafeArray)
  72                                         throw new ArgumentException ();
  73                                 return tbase;
  74                         }
  75                 }
  76
  77                 public int ElementCount {
  78                         get {return count;}
  79                 }
  80
  81                 public UnmanagedType GetUnmanagedType {
  82                         get {return t;}
  83                 }
  84
  85                 public Guid IIDGuid {
  86                         get {return new Guid (guid);}
  87                 }
  88
  89                 public static UnmanagedMarshal DefineByValArray( int elemCount) {
  90                         return new UnmanagedMarshal (UnmanagedType.ByValArray, elemCount);
  91                 }
  92
  93                 public static UnmanagedMarshal DefineByValTStr( int elemCount) {
  94                         return new UnmanagedMarshal (UnmanagedType.ByValTStr, elemCount);
  95                 }
  96
  97                 public static UnmanagedMarshal DefineLPArray( UnmanagedType elemType) {
  98                         return new UnmanagedMarshal (UnmanagedType.LPArray, elemType);
  99                 }
 100
 101                 public static UnmanagedMarshal DefineSafeArray( UnmanagedType elemType) {
 102                         return new UnmanagedMarshal (UnmanagedType.SafeArray, elemType);
 103                 }
 104
 105                 public static UnmanagedMarshal DefineUnmanagedMarshal( UnmanagedType unmanagedType) {
 106                         return new UnmanagedMarshal (unmanagedType, unmanagedType);
 107                 }
 108
 109                 internal static UnmanagedMarshal DefineCustom (Type typeref, string cookie, string mtype, Guid id) {
 110                         UnmanagedMarshal res = new UnmanagedMarshal (UnmanagedType.CustomMarshaler, UnmanagedType.CustomMarshaler);
 111                         res.mcookie = cookie;
 112                         res.marshaltype = mtype;
 113                         res.marshaltyperef = typeref;
 114                         if (id == Guid.Empty)
 115                                 res.guid = String.Empty;
 116                         else
 117                                 res.guid = id.ToString ();
 118                         return res;
 119                 }
 120
 121                 // sizeConst and sizeParamIndex can be -1 meaning they are not specified
 122                 internal static UnmanagedMarshal DefineLPArrayInternal (UnmanagedType elemType, int sizeConst, int sizeParamIndex) {
 123                         UnmanagedMarshal res = new UnmanagedMarshal (UnmanagedType.LPArray, elemType);
 124                         res.count = sizeConst;
 125                         res.param_num = sizeParamIndex;
 126                         res.has_size = true;
 127
 128                         return res;
 129                 }
 130         }
 131 }
 132 #endif