public static Type DefineDelegateType(string typeName, Type returnType, params Type[] parameterTypes)
{
DelegateInfo info = new DelegateInfo(returnType, parameterTypes);
if (_typeCache.ContainsKey(info))
return _typeCache[info];
AppDomain currentDomain = AppDomain.CurrentDomain;
string assemblyName = string.Format("{0}Assembly", typeName);
string moduleName = string.Format("{0}Module", typeName);
AssemblyName name = new AssemblyName(assemblyName);
AssemblyBuilderAccess access = AssemblyBuilderAccess.RunAndSave;
AssemblyBuilder assemblyBuilder = currentDomain.DefineDynamicAssembly(name, access);
ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule(moduleName, string.Format("{0}.mod", moduleName), true);
TypeAttributes typeAttributes = TypeAttributes.Class | TypeAttributes.Sealed | TypeAttributes.Public | TypeAttributes.AnsiClass | TypeAttributes.AutoClass;
TypeBuilder typeBuilder = moduleBuilder.DefineType(typeName, typeAttributes, typeof(MulticastDelegate));
// Delegate constructor
ConstructorBuilder constructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.RTSpecialName |
MethodAttributes.HideBySig | MethodAttributes.Public | MethodAttributes.SpecialName,
CallingConventions.Standard,
new Type[] { typeof(object), typeof(System.IntPtr) });
constructorBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
// Define the Invoke method with a signature that matches the parameter types
MethodAttributes methodAttributes = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.NewSlot | MethodAttributes.Virtual;
MethodBuilder methodBuilder = typeBuilder.DefineMethod("Invoke", methodAttributes, returnType, parameterTypes);
methodBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
#region Define the Begin/EndInvoke methods for async callback support
methodBuilder = typeBuilder.DefineMethod("BeginInvoke", methodAttributes, typeof(System.IAsyncResult),
new Type[] { typeof(int), typeof(AsyncCallback), typeof(object) });
methodBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
methodBuilder = typeBuilder.DefineMethod("EndInvoke", methodAttributes, typeof(void),
new Type[] { typeof(IAsyncResult) });
methodBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
#endregion
Type result = typeBuilder.CreateType();
// Cache the result
if (result != null)
_typeCache[info] = result;
return result;
}
private static bool CompareParameters(DelegateInfo info, Type[] parameterTypes)
{
if (info.Parameters == null && parameterTypes == null)
return true;
if (info.Parameters.Length != parameterTypes.Length)
return false;
for (int position = 0; position < parameterTypes.Length; position++)
{
if (info.Parameters[position] != parameterTypes[position])
return false;
}
return true;
}
private static bool Compare(DelegateInfo lhs, DelegateInfo rhs)
{
return(lhs.ReturnType == rhs.ReturnType &&
CompareParameters(lhs, rhs.Parameters));
}
public static Type DefineDelegateType(string typeName, Type returnType, params Type[] parameterTypes)
{
var info = new DelegateInfo(returnType, parameterTypes);
if (TypeCache.ContainsKey(info))
{
return(TypeCache[info]);
}
var currentDomain = AppDomain.CurrentDomain;
var assemblyName = string.Format("{0}Assembly", typeName);
var moduleName = string.Format("{0}Module", typeName);
var name = new AssemblyName(assemblyName);
var access = AssemblyBuilderAccess.RunAndSave;
var assemblyBuilder = currentDomain.DefineDynamicAssembly(name, access);
var moduleBuilder = assemblyBuilder.DefineDynamicModule(moduleName, string.Format("{0}.mod", moduleName),
true);
var typeAttributes = TypeAttributes.Class | TypeAttributes.Sealed | TypeAttributes.Public |
TypeAttributes.AnsiClass | TypeAttributes.AutoClass;
var typeBuilder = moduleBuilder.DefineType(typeName, typeAttributes, typeof(MulticastDelegate));
// Delegate constructor
var constructorBuilder = typeBuilder.DefineConstructor(MethodAttributes.RTSpecialName |
MethodAttributes.HideBySig | MethodAttributes.Public |
MethodAttributes.SpecialName,
CallingConventions.Standard,
new[] { typeof(object), typeof(IntPtr) });
constructorBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
// Define the Invoke method with a signature that matches the parameter types
var methodAttributes = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.NewSlot |
MethodAttributes.Virtual;
var methodBuilder = typeBuilder.DefineMethod("Invoke", methodAttributes, returnType, parameterTypes);
methodBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
#region Define the Begin/EndInvoke methods for async callback support
methodBuilder = typeBuilder.DefineMethod("BeginInvoke", methodAttributes, typeof(IAsyncResult),
new[] { typeof(int), typeof(AsyncCallback), typeof(object) });
methodBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
methodBuilder = typeBuilder.DefineMethod("EndInvoke", methodAttributes, typeof(void),
new[] { typeof(IAsyncResult) });
methodBuilder.SetImplementationFlags(MethodImplAttributes.Runtime | MethodImplAttributes.Managed);
#endregion
var result = typeBuilder.CreateType();
// Cache the result
if (result != null)
{
TypeCache[info] = result;
}
return(result);
}
private static bool Compare(DelegateInfo lhs, DelegateInfo rhs)
{
return lhs.ReturnType == rhs.ReturnType &&
CompareParameters(lhs, rhs.Parameters) == true;
}
