C# MethodBuilder.SetImplementationFlags方法代码示例

		static TypeBuilder DefineDelegate () {
		   TypeBuilder typeBuilder = module.DefineType( "MyDelegate", 
				TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.Sealed, 
				typeof (object) );
			args = typeBuilder.DefineGenericParameters ("TIn", "TOut");

			delegate_ctor = typeBuilder.DefineConstructor( 
				MethodAttributes.Public | MethodAttributes.HideBySig | 
				MethodAttributes.RTSpecialName | MethodAttributes.SpecialName, 
				CallingConventions.Standard, 
				new Type[] { typeof(Object), typeof (IntPtr) } ); 

			delegate_ctor.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed ); 

			invoke_mb = typeBuilder.DefineMethod( 
				"Invoke", 
				MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig, 
				args [1], 
				new Type[] { args [0] } ); 

			invoke_mb.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed ); 

			MethodBuilder mb = typeBuilder.DefineMethod( 
				"BeginInvoke", 
				MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig, 
				typeof (IAsyncResult), 
				new Type[] { args [0], typeof (AsyncCallback), typeof (object) } ); 

			mb.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed ); 

			mb = typeBuilder.DefineMethod( 
				"EndInvoke", 
				MethodAttributes.Public | MethodAttributes.Virtual | MethodAttributes.HideBySig, 
				args [1], 
				new Type[] {  typeof (IAsyncResult) } ); 

			mb.SetImplementationFlags( MethodImplAttributes.Runtime | MethodImplAttributes.Managed ); 

			return typeBuilder;
		}

 		public override bool Define ()
		{
			if (IsGeneric) {
				foreach (TypeParameter type_param in TypeParameters) {
					if (!type_param.Resolve (this))
						return false;
				}

				foreach (TypeParameter type_param in TypeParameters) {
					if (!type_param.DefineType (this))
						return false;
				}
			}

			member_cache = new MemberCache (TypeManager.multicast_delegate_type, this);

			// FIXME: POSSIBLY make this static, as it is always constant
			//
			Type [] const_arg_types = new Type [2];
			const_arg_types [0] = TypeManager.object_type;
			const_arg_types [1] = TypeManager.intptr_type;

			const MethodAttributes ctor_mattr = MethodAttributes.RTSpecialName | MethodAttributes.SpecialName |
				MethodAttributes.HideBySig | MethodAttributes.Public;

			ConstructorBuilder = TypeBuilder.DefineConstructor (ctor_mattr,
									    CallingConventions.Standard,
									    const_arg_types);

			ConstructorBuilder.DefineParameter (1, ParameterAttributes.None, "object");
			ConstructorBuilder.DefineParameter (2, ParameterAttributes.None, "method");
			//
			// HACK because System.Reflection.Emit is lame
			//
			IParameterData [] fixed_pars = new IParameterData [] {
				new ParameterData ("object", Parameter.Modifier.NONE),
				new ParameterData ("method", Parameter.Modifier.NONE)
			};

			AParametersCollection const_parameters = new ParametersImported (
				fixed_pars,
				new Type[] { TypeManager.object_type, TypeManager.intptr_type });
			
			TypeManager.RegisterMethod (ConstructorBuilder, const_parameters);
			member_cache.AddMember (ConstructorBuilder, this);
			
			ConstructorBuilder.SetImplementationFlags (MethodImplAttributes.Runtime);

			//
			// Here the various methods like Invoke, BeginInvoke etc are defined
			//
			// First, call the `out of band' special method for
			// defining recursively any types we need:
			
			if (!Parameters.Resolve (this))
				return false;

			//
			// Invoke method
			//

			// Check accessibility
			foreach (Type partype in Parameters.Types){
				if (!IsAccessibleAs (partype)) {
					Report.SymbolRelatedToPreviousError (partype);
					Report.Error (59, Location,
						      "Inconsistent accessibility: parameter type `{0}' is less accessible than delegate `{1}'",
						      TypeManager.CSharpName (partype),
						      GetSignatureForError ());
					return false;
				}
			}
			
			ReturnType = ReturnType.ResolveAsTypeTerminal (this, false);
			if (ReturnType == null)
				return false;

			ret_type = ReturnType.Type;
            
			if (!IsAccessibleAs (ret_type)) {
				Report.SymbolRelatedToPreviousError (ret_type);
				Report.Error (58, Location,
					      "Inconsistent accessibility: return type `" +
					      TypeManager.CSharpName (ret_type) + "' is less " +
					      "accessible than delegate `" + GetSignatureForError () + "'");
				return false;
			}

			CheckProtectedModifier ();

			if (RootContext.StdLib && TypeManager.IsSpecialType (ret_type)) {
				Method.Error1599 (Location, ret_type, Report);
				return false;
			}

			TypeManager.CheckTypeVariance (ret_type, Variance.Covariant, this);

			//
			// We don't have to check any others because they are all
			// guaranteed to be accessible - they are standard types.
//.........这里部分代码省略.........

		void DefineAsyncMethods (CallingConventions cc)
		{
			//
			// BeginInvoke
			//
			ParametersCompiled async_parameters = ParametersCompiled.MergeGenerated (Parameters, false,
				new Parameter [] {
					new Parameter (null, "callback", Parameter.Modifier.NONE, null, Location),
					new Parameter (null, "object", Parameter.Modifier.NONE, null, Location)
				},
				new Type [] {
					TypeManager.asynccallback_type,
					TypeManager.object_type
				}
			);

			BeginInvokeBuilder = TypeBuilder.DefineMethod ("BeginInvoke",
				mattr, cc, TypeManager.iasyncresult_type, async_parameters.GetEmitTypes ());

			BeginInvokeBuilder.SetImplementationFlags (MethodImplAttributes.Runtime);
			TypeManager.RegisterMethod (BeginInvokeBuilder, async_parameters);
			member_cache.AddMember (BeginInvokeBuilder, this);

			//
			// EndInvoke is a bit more interesting, all the parameters labeled as
			// out or ref have to be duplicated here.
			//

			//
			// Define parameters, and count out/ref parameters
			//
			ParametersCompiled end_parameters;
			int out_params = 0;

			foreach (Parameter p in Parameters.FixedParameters) {
				if ((p.ModFlags & Parameter.Modifier.ISBYREF) != 0)
					++out_params;
			}

			if (out_params > 0) {
				Type [] end_param_types = new Type [out_params];
				Parameter[] end_params = new Parameter [out_params];

				int param = 0;
				for (int i = 0; i < Parameters.FixedParameters.Length; ++i) {
					Parameter p = Parameters [i];
					if ((p.ModFlags & Parameter.Modifier.ISBYREF) == 0)
						continue;

					end_param_types [param] = Parameters.Types [i];
					end_params [param] = p;
					++param;
				}
				end_parameters = ParametersCompiled.CreateFullyResolved (end_params, end_param_types);
			} else {
				end_parameters = ParametersCompiled.EmptyReadOnlyParameters;
			}

			end_parameters = ParametersCompiled.MergeGenerated (end_parameters, false,
				new Parameter (null, "result", Parameter.Modifier.NONE, null, Location), TypeManager.iasyncresult_type);

			//
			// Create method, define parameters, register parameters with type system
			//
			EndInvokeBuilder = TypeBuilder.DefineMethod ("EndInvoke", mattr, cc, ret_type, end_parameters.GetEmitTypes ());
			EndInvokeBuilder.SetImplementationFlags (MethodImplAttributes.Runtime);

			end_parameters.ApplyAttributes (EndInvokeBuilder);
			TypeManager.RegisterMethod (EndInvokeBuilder, end_parameters);
			member_cache.AddMember (EndInvokeBuilder, this);
		}