private MethodInfo CreateDecodeDeferredMethod(ProxyClassBuildingContext classContext, string parentMethodName, IReadOnlyList <Type> genericTypeArguments, Type pureRetvalType)
{
var methodBuilder = classContext.Builder.DefineMethod("__rpc_decode_deferred_" + parentMethodName,
MethodAttributes.Private | MethodAttributes.HideBySig);
var genericTypeParameterBuilders = genericTypeArguments.Any()
? methodBuilder.DefineGenericParameters(genericTypeArguments.Select(x => x.Name).ToArray())
: new GenericTypeParameterBuilder[0];
var genericArgumentMap = genericTypeParameterBuilders.ToDictionary(x => x.Name, x => (Type)x);
var retvalType = pureRetvalType.DeepSubstituteGenerics(genericArgumentMap);
methodBuilder.SetParameters(DecodeDeferredParameterTypes);
methodBuilder.SetReturnType(retvalType);
methodBuilder.SetImplementationFlags(MethodImplAttributes.Managed);
var il = new MyILGenerator(methodBuilder.GetILGenerator());
var emittingContext = new ProxyMethodEmittingContext(il, classContext.Fields);
il.Ldarg(1);
il.Call(TaskMethods.GetResult(typeof(byte[])));
EmitPrepareToDecode(emittingContext);
var retvalCodec = new ProxyMethodRetvalCodec(retvalType);
retvalCodec.EmitDecode(emittingContext);
il.Ret();
return(methodBuilder);
}
private void CreateConstructor(ProxyClassBuildingContext classContext, string path, ServiceDescription serviceDescription)
{
const int thisArgIndex = 0;
const int processorArgIndex = 1;
const int scopeArgIndex = 2;
const int timeoutSettingsArgIndex = 3;
const int codecContainerArgIndex = 4;
var constructorBuilder = classContext.Builder.DefineConstructor(
MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.SpecialName | MethodAttributes.RTSpecialName,
CallingConventions.Standard, ConstructorParameterTypes);
var baseConstructor = typeof(object).GetConstructor(Type.EmptyTypes);
var il = new MyILGenerator(constructorBuilder.GetILGenerator());
il.Ldarg(thisArgIndex);
il.Call(baseConstructor);
il.Ldarg(thisArgIndex);
il.Ldarg(processorArgIndex);
il.Stfld(classContext.Fields.Processor);
il.Ldarg(thisArgIndex);
il.Ldarg(scopeArgIndex);
il.Stfld(classContext.Fields.Scope);
il.Ldarg(thisArgIndex);
il.Ldarg(timeoutSettingsArgIndex);
il.Stfld(classContext.Fields.TimeoutSettings);
il.Ldarg(thisArgIndex);
il.Ldarg(codecContainerArgIndex);
il.Stfld(classContext.Fields.CodecContainer);
foreach (var manualCodecField in classContext.Fields.GetAllManualCodecFields())
{
var type = manualCodecField.FieldType.GenericTypeArguments[0];
ValidateManualCodecType(type);
il.Ldarg(thisArgIndex);
il.Ldarg(codecContainerArgIndex);
il.Call(CodecContainerMethods.GetManualCodecFor(type));
il.Stfld(manualCodecField);
}
foreach (var subserviceDesc in serviceDescription.Subservices)
{
var proxyClass = CreateProxyClass(classContext.InterfaceType, subserviceDesc.Type, path + "/" + subserviceDesc.Name);
var fieldBuilder = CreateSubserviceField(classContext, subserviceDesc, proxyClass);
CreateSubserviceProperty(classContext, subserviceDesc, fieldBuilder);
il.Ldarg(thisArgIndex);
il.Ldarg(processorArgIndex);
il.Ldarg(scopeArgIndex);
il.Ldarg(timeoutSettingsArgIndex);
il.Ldarg(codecContainerArgIndex);
il.Newobj(proxyClass.GetConstructor(ConstructorParameterTypes));
il.Stfld(fieldBuilder);
}
il.Ret();
}
private Type CreateProxyClass(Type rootInterfaceType, Type interfaceType, string path)
{
var serviceDescription = serviceDescriptionBuilder.Build(interfaceType);
path = path ?? serviceDescription.Name;
var typeBuilder = DeclareType(interfaceType);
var fieldCache = new ProxyClassFieldCache(typeBuilder);
var classContext = new ProxyClassBuildingContext(rootInterfaceType, path, typeBuilder, fieldCache);
foreach (var methodDesc in serviceDescription.Methods)
{
CreateMethod(classContext, path, methodDesc);
}
CreateConstructor(classContext, path, serviceDescription);
return(typeBuilder.CreateType());
}
private static void CreateSubserviceProperty(ProxyClassBuildingContext classContext, ServiceDescription subserviceDescription, FieldBuilder fieldBuilder)
{
var methodBuilder = classContext.Builder.DefineMethod("get_" + subserviceDescription.Name,
MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.HideBySig |
MethodAttributes.SpecialName | MethodAttributes.NewSlot | MethodAttributes.Virtual,
subserviceDescription.Type, Type.EmptyTypes);
methodBuilder.SetImplementationFlags(MethodImplAttributes.Managed);
var il = new MyILGenerator(methodBuilder.GetILGenerator());
il.Ldarg(0);
il.Ldfld(fieldBuilder);
il.Ret();
var propertyBuilder = classContext.Builder.DefineProperty(subserviceDescription.Name,
PropertyAttributes.None, subserviceDescription.Type, Type.EmptyTypes);
propertyBuilder.SetGetMethod(methodBuilder);
}
private void EmitProcessAsyncWithRetval(ProxyClassBuildingContext classContext, IEmittingContext emittingContext, string parameterMethodName, IReadOnlyList <Type> genericTypeArguments, Type retvalType)
{
var pureRetvalType = retvalType.GetGenericArguments().Single();
var decodeDeferredMethod = CreateDecodeDeferredMethod(classContext, parameterMethodName, genericTypeArguments, pureRetvalType);
if (decodeDeferredMethod.IsGenericMethodDefinition)
{
decodeDeferredMethod = decodeDeferredMethod.MakeGenericMethod(genericTypeArguments.ToArray());
}
var funcConstructor = FuncMethods.Constructor(typeof(Task <byte[]>), pureRetvalType);
var continueWithMethod = TaskMethods.ContinueWith(typeof(byte[]), pureRetvalType);
var il = emittingContext.IL;
il.Callvirt(OutgoingRequestProcessorMethods.ProcessAsync);
il.Ldarg(0);
il.Ldftn(decodeDeferredMethod);
il.Newobj(funcConstructor);
il.Callvirt(continueWithMethod);
}
private void CreateMethod(ProxyClassBuildingContext classContext, string path, MethodDescription methodDesc)
{
var methodBuilder = classContext.Builder.DefineMethod(methodDesc.Name,
MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.HideBySig |
MethodAttributes.NewSlot | MethodAttributes.Virtual);
var genericTypeParameterBuilders = methodDesc.GenericParameters.Any()
? methodBuilder.DefineGenericParameters(methodDesc.GenericParameters.Select(x => x.Name).ToArray())
: new GenericTypeParameterBuilder[0];
var genericTypeParameterCodecs = genericTypeParameterBuilders.Select(x => new ProxyMethodGenericArgumentCodec(x)).ToArray();
var genericArgumentMap = genericTypeParameterBuilders.ToDictionary(x => x.Name, x => (Type)x);
var parameterDescriptions = methodDesc.Parameters.Select(x => x.DeepSubstituteGenerics(genericArgumentMap)).ToArray();
var parameterTypesAdjustedForRefs = parameterDescriptions.Select(x => x.Way == MethodParameterWay.Val ? x.Type : x.Type.MakeByRefType()).ToArray();
var allParameterCodecs = parameterDescriptions.Select(x => new ProxyMethodParameterCodec(x)).ToArray();
var retvalType = methodDesc.ReturnType.DeepSubstituteGenerics(genericArgumentMap);
methodBuilder.SetParameters(parameterTypesAdjustedForRefs);
methodBuilder.SetReturnType(retvalType);
methodBuilder.SetImplementationFlags(MethodImplAttributes.Managed);
var il = new MyILGenerator(methodBuilder.GetILGenerator());
var emittingContext = new ProxyMethodEmittingContext(il, classContext.Fields);
var requestDataArrayVar = il.DeclareLocal(typeof(byte[])); // byte[] dataArray
var requestParametersCodecs = allParameterCodecs.Where(x => x.IsRequestParameter).ToArray();
if (requestParametersCodecs.Any() || genericTypeParameterBuilders.Any())
{
bool haveSizeOnStack = false;
foreach (var codec in genericTypeParameterCodecs)
{
codec.EmitCalculateSize(emittingContext); // stack_0 += CalculateSize(T_i)
EmitAddIf(il, ref haveSizeOnStack);
}
foreach (var parameter in requestParametersCodecs)
{
parameter.EmitCalculateSize(emittingContext); // stack_0 += CalculateSize(arg_i)
EmitAddIf(il, ref haveSizeOnStack);
}
il.Newarr(typeof(byte)); // dataArray = new byte[stack_0]
il.Stloc(requestDataArrayVar);
var pinnedVar = il.PinArray(typeof(byte), requestDataArrayVar); // var pinned dataPointer = pin(dataArray)
il.Ldloc(pinnedVar); // data = dataPointer
il.Stloc(emittingContext.DataPointerVar);
foreach (var codec in genericTypeParameterCodecs)
{
codec.EmitEncode(emittingContext); // Encode(T_i, data)
}
foreach (var codec in requestParametersCodecs)
{
codec.EmitEncode(emittingContext); // Encode(arg_i, data)
}
}
else
{
il.Ldnull(); // dataArray = null
il.Stloc(requestDataArrayVar);
}
il.Ldarg(0); // stack_0 = methodCallProcessor
il.Ldfld(classContext.Fields.Processor);
il.Ldtoken(classContext.InterfaceType); // stack_1 = typeof(T)
il.Call(TypeMethods.GetTypeFromHandle);
il.Ldstr(string.Format("{0}/{1}", path, methodDesc.Name)); // stack_2 = SuperServicePath/ServiceName/MethodName
il.Ldarg(0); // stack_3 = scope
il.Ldfld(classContext.Fields.Scope);
il.Ldloc(requestDataArrayVar); // stack_4 = dataArray
il.Ldarg(0); // stack_5 = timeoutSettings
il.Ldfld(classContext.Fields.TimeoutSettings);
var responseParameterCodecs = allParameterCodecs.Where(x => x.IsResponseParameter).ToArray();
if (responseParameterCodecs.Any() && methodDesc.RemotingType != MethodRemotingType.Direct)
{
throw new ArgumentException(string.Format("Error processing {0} method: only direct methods can have Ref or Out parameters", path));
}
switch (methodDesc.RemotingType)
{
case MethodRemotingType.Direct:
EmitProcessDirect(emittingContext, responseParameterCodecs, retvalType);
break;
case MethodRemotingType.AsyncVoid:
EmitProcessAsyncVoid(il);
break;
case MethodRemotingType.AsyncWithRetval:
EmitProcessAsyncWithRetval(classContext, emittingContext, methodDesc.Name, genericTypeParameterBuilders, retvalType);
break;
default:
throw new ArgumentOutOfRangeException();
}
il.Ret();
}
private static FieldBuilder CreateSubserviceField(ProxyClassBuildingContext classContext, ServiceDescription subserviceDescription, Type proxyClass)
{
return(classContext.Builder.DefineField("_" + subserviceDescription.Name, proxyClass,
FieldAttributes.Private | FieldAttributes.InitOnly));
}