1.1 --- a/Utilities/PInvokeDelegateFactory.cs Thu Aug 05 19:28:50 2010 +0000
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,118 +0,0 @@
1.4 -/*
1.5 -
1.6 - Version: MPL 1.1/GPL 2.0/LGPL 2.1
1.7 -
1.8 - The contents of this file are subject to the Mozilla Public License Version
1.9 - 1.1 (the "License"); you may not use this file except in compliance with
1.10 - the License. You may obtain a copy of the License at
1.11 -
1.12 - http://www.mozilla.org/MPL/
1.13 -
1.14 - Software distributed under the License is distributed on an "AS IS" basis,
1.15 - WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
1.16 - for the specific language governing rights and limitations under the License.
1.17 -
1.18 - The Original Code is the Open Hardware Monitor code.
1.19 -
1.20 - The Initial Developer of the Original Code is
1.21 - Michael Möller <m.moeller@gmx.ch>.
1.22 - Portions created by the Initial Developer are Copyright (C) 2009-2010
1.23 - the Initial Developer. All Rights Reserved.
1.24 -
1.25 - Contributor(s):
1.26 -
1.27 - Alternatively, the contents of this file may be used under the terms of
1.28 - either the GNU General Public License Version 2 or later (the "GPL"), or
1.29 - the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
1.30 - in which case the provisions of the GPL or the LGPL are applicable instead
1.31 - of those above. If you wish to allow use of your version of this file only
1.32 - under the terms of either the GPL or the LGPL, and not to allow others to
1.33 - use your version of this file under the terms of the MPL, indicate your
1.34 - decision by deleting the provisions above and replace them with the notice
1.35 - and other provisions required by the GPL or the LGPL. If you do not delete
1.36 - the provisions above, a recipient may use your version of this file under
1.37 - the terms of any one of the MPL, the GPL or the LGPL.
1.38 -
1.39 -*/
1.40 -
1.41 -using System;
1.42 -using System.Collections.Generic;
1.43 -using System.Reflection;
1.44 -using System.Reflection.Emit;
1.45 -using System.Runtime.InteropServices;
1.46 -
1.47 -namespace OpenHardwareMonitor.Hardware {
1.48 -
1.49 - public sealed class PInvokeDelegateFactory {
1.50 -
1.51 - private static AssemblyBuilder assemblyBuilder;
1.52 - private static ModuleBuilder moduleBuilder;
1.53 -
1.54 - private static IDictionary<DllImportAttribute, Type> wrapperTypes =
1.55 - new Dictionary<DllImportAttribute, Type>();
1.56 -
1.57 - static PInvokeDelegateFactory() {
1.58 -
1.59 - AssemblyName assemblyName = new AssemblyName();
1.60 - assemblyName.Name = "PInvokeDelegateFactoryInternalAssembly";
1.61 -
1.62 - assemblyBuilder =
1.63 - AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName,
1.64 - AssemblyBuilderAccess.Run);
1.65 -
1.66 - moduleBuilder = assemblyBuilder.DefineDynamicModule(
1.67 - "PInvokeDelegateFactoryInternalModule");
1.68 - }
1.69 -
1.70 - private PInvokeDelegateFactory() { }
1.71 -
1.72 - public static void CreateDelegate<T>(DllImportAttribute dllImportAttribute,
1.73 - out T newDelegate) where T : class
1.74 - {
1.75 - Type wrapperType;
1.76 - wrapperTypes.TryGetValue(dllImportAttribute, out wrapperType);
1.77 -
1.78 - if (wrapperType == null) {
1.79 - wrapperType = CreateWrapperType(typeof(T), dllImportAttribute);
1.80 - wrapperTypes.Add(dllImportAttribute, wrapperType);
1.81 - }
1.82 -
1.83 - newDelegate = Delegate.CreateDelegate(typeof(T), wrapperType,
1.84 - dllImportAttribute.EntryPoint) as T;
1.85 - }
1.86 -
1.87 -
1.88 - private static Type CreateWrapperType(Type delegateType,
1.89 - DllImportAttribute dllImportAttribute) {
1.90 -
1.91 - TypeBuilder typeBuilder = moduleBuilder.DefineType(
1.92 - "PInvokeDelegateFactoryInternalWrapperType" + wrapperTypes.Count);
1.93 -
1.94 - MethodInfo methodInfo = delegateType.GetMethod("Invoke");
1.95 -
1.96 - ParameterInfo[] parameterInfos = methodInfo.GetParameters();
1.97 - int parameterCount = parameterInfos.GetLength(0);
1.98 -
1.99 - Type[] parameterTypes = new Type[parameterCount];
1.100 - for (int i = 0; i < parameterCount; i++)
1.101 - parameterTypes[i] = parameterInfos[i].ParameterType;
1.102 -
1.103 - MethodBuilder methodBuilder = typeBuilder.DefinePInvokeMethod(
1.104 - dllImportAttribute.EntryPoint, dllImportAttribute.Value,
1.105 - MethodAttributes.Public | MethodAttributes.Static |
1.106 - MethodAttributes.PinvokeImpl, CallingConventions.Standard,
1.107 - methodInfo.ReturnType, parameterTypes,
1.108 - dllImportAttribute.CallingConvention,
1.109 - dllImportAttribute.CharSet);
1.110 -
1.111 - foreach (ParameterInfo parameterInfo in parameterInfos)
1.112 - methodBuilder.DefineParameter(parameterInfo.Position + 1,
1.113 - parameterInfo.Attributes, parameterInfo.Name);
1.114 -
1.115 - if (dllImportAttribute.PreserveSig)
1.116 - methodBuilder.SetImplementationFlags(MethodImplAttributes.PreserveSig);
1.117 -
1.118 - return typeBuilder.CreateType();
1.119 - }
1.120 - }
1.121 -}