public void Trivial()
{
var implementationInfo = new ServiceImplementationInfo();
var path = new ServicePath("MyService", "MyMethod");
var handler = (ServiceMethodHandler)((i, d) => new byte[0]);
factory.CreateMethodHandler(implementationInfo, path).Returns(handler);
var handler1 = container.GetMethodHandler(implementationInfo, path);
var handler2 = container.GetMethodHandler(implementationInfo, path);
Assert.That(handler1, Is.EqualTo(handler2));
}
public ServiceMethodHandler CreateMethodHandler(ServiceImplementationInfo serviceImplementationInfo, ServicePath servicePath)
{
var serviceInterface = serviceImplementationInfo.Interface;
var dynamicMethod = new DynamicMethod(
"__srpc__handle__" + serviceInterface.FullName + "__" + string.Join("_", servicePath),
typeof(byte[]), ParameterTypes, Assembly.GetExecutingAssembly().ManifestModule);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, true);
il.Emit(OpCodes.Ldarg_0); // stack_0 = (TServiceImplementation) arg_0
il.Emit(OpCodes.Castclass, serviceInterface);
var serviceDesc = serviceImplementationInfo.Description;
for (int i = 1; i < servicePath.Length - 1; i++)
{
var propertyInfo = serviceDesc.Type.GetProperty(servicePath[i]);
il.Emit(OpCodes.Callvirt, propertyInfo.GetGetMethod()); // stack_0 = stack_0.Property
SubserviceDescription subserviceDescription;
if (!serviceDesc.TryGetSubservice(servicePath[i], out subserviceDescription))
throw new InvalidPathException();
serviceDesc = subserviceDescription.Service;
}
var methodName = servicePath.MethodName;
var methodInfo = serviceDesc.Type.GetMethod(methodName);
MethodDescription methodDesc;
if (!serviceDesc.TryGetMethod(methodName, out methodDesc))
throw new InvalidPathException();
bool hasRetval = methodDesc.ReturnType != typeof(void);
var parameters = methodDesc.Parameters.Select((x, i) => new ParameterNecessity
{
Description = x,
Codec = codecContainer.GetEmittingCodecFor(x.Type),
LocalVariable = x.Way != MethodParameterWay.Val ? il.DeclareLocal(x.Type) : null,
ArgumentIndex = i
})
.ToArray();
var requestParameters = parameters
.Where(x => x.Description.Way == MethodParameterWay.Val || x.Description.Way == MethodParameterWay.Ref)
.ToArray();
var responseParameters = parameters
.Where(x => x.Description.Way == MethodParameterWay.Ref || x.Description.Way == MethodParameterWay.Out)
.ToArray();
LocalBuilder requestDataPointerVar = null;
if (requestParameters.Any())
{
il.Emit(OpCodes.Ldarg_1); // remainingBytes = arg_1.Length
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Stloc, locals.RemainingBytes);
requestDataPointerVar = // var pinned dataPointer = pin(arg_1)
il.Emit_PinArray(typeof(byte), locals, 1);
il.Emit(OpCodes.Ldloc, requestDataPointerVar); // data = dataPointer
il.Emit(OpCodes.Stloc, locals.DataPointer);
}
foreach (var parameter in parameters)
{
switch (parameter.Description.Way)
{
case MethodParameterWay.Val:
parameter.Codec.EmitDecode(il, locals, false); // stack_i = decode(data, remainingBytes, false)
break;
case MethodParameterWay.Ref:
parameter.Codec.EmitDecode(il, locals, false); // param_i = decode(data, remainingBytes, false)
il.Emit(OpCodes.Stloc, parameter.LocalVariable);
il.Emit(OpCodes.Ldloca, parameter.LocalVariable); // stack_i = *param_i
break;
case MethodParameterWay.Out:
il.Emit(OpCodes.Ldloca, parameter.LocalVariable); // stack_i = *param_i
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (requestParameters.Any())
{
il.Emit_UnpinArray(requestDataPointerVar); // unpin(dataPointer)
}
il.Emit(OpCodes.Callvirt, methodInfo); // stack_0 = stack_0.Method(stack_1, stack_2, ...)
if (hasRetval || responseParameters.Any())
{
IEmittingCodec retvalCodec = null;
LocalBuilder retvalVar = null;
if (hasRetval)
{
retvalCodec = codecContainer.GetEmittingCodecFor(methodDesc.ReturnType);
retvalVar = il.DeclareLocal(methodDesc.ReturnType); // var ret = stack_0
il.Emit(OpCodes.Stloc, retvalVar);
retvalCodec.EmitCalculateSize(il, retvalVar); // stack_0 = calculateSize(ret)
}
bool hasSizeOnStack = hasRetval;
foreach (var parameter in responseParameters)
{
parameter.Codec.EmitCalculateSize(il, parameter.LocalVariable); // stack_0 += calculateSize(param_i)
if (hasSizeOnStack)
il.Emit(OpCodes.Add);
else
hasSizeOnStack = true;
}
var dataArrayVar = il.DeclareLocal(typeof(byte[])); // var dataArray = new byte[size of retval]
il.Emit(OpCodes.Newarr, typeof(byte));
il.Emit(OpCodes.Stloc, dataArrayVar);
var responseDataPointerVar = // var pinned dataPointer = pin(dataArrayVar)
il.Emit_PinArray(typeof(byte), locals, dataArrayVar);
il.Emit(OpCodes.Ldloc, responseDataPointerVar); // data = dataPointer
il.Emit(OpCodes.Stloc, locals.DataPointer);
foreach (var parameter in responseParameters)
parameter.Codec.EmitEncode(il, locals, parameter.LocalVariable);// encode(data, param_i)
if (hasRetval)
retvalCodec.EmitEncode(il, locals, retvalVar); // encode(data, ret)
il.Emit_UnpinArray(responseDataPointerVar); // unpin(dataPointer)
il.Emit(OpCodes.Ldloc, dataArrayVar); // stack_0 = dataArray
}
else
{
il.Emit(OpCodes.Ldc_I4, 0); // stack_0 = new byte[0]
il.Emit(OpCodes.Newarr, typeof(byte));
}
il.Emit(OpCodes.Ret);
return (ServiceMethodHandler)dynamicMethod.CreateDelegate(typeof(ServiceMethodHandler));
}
public ServiceMethodHandler CreateMethodHandler(ServiceImplementationInfo serviceImplementationInfo, ServicePath servicePath)
{
var serviceInterface = serviceImplementationInfo.Description.Type;
var dynamicMethod = new DynamicMethod(
"__srpc__handle__" + serviceInterface.FullName + "__" + string.Join("_", servicePath),
typeof(byte[]), ParameterTypes, Assembly.GetExecutingAssembly().ManifestModule, true);
var il = dynamicMethod.GetILGenerator();
var locals = new LocalVariableCollection(il, true);
il.Emit(OpCodes.Ldarg_0); // stack_0 = (TServiceImplementation) arg_0
il.Emit(OpCodes.Castclass, serviceInterface);
var serviceDesc = serviceImplementationInfo.Description;
for (int i = 1; i < servicePath.Length - 1; i++)
{
var propertyInfo = serviceDesc.Type.GetProperty(servicePath[i]);
il.Emit(OpCodes.Callvirt, propertyInfo.GetGetMethod()); // stack_0 = stack_0.Property
SubserviceDescription subserviceDescription;
if (!serviceDesc.TryGetSubservice(servicePath[i], out subserviceDescription))
{
throw new InvalidPathException();
}
serviceDesc = subserviceDescription.Service;
}
var methodName = servicePath.MethodName;
MethodDescription methodDesc;
if (!serviceDesc.TryGetMethod(methodName, out methodDesc))
{
throw new InvalidPathException();
}
bool hasRetval = methodDesc.ReturnType != typeof(void);
var parameters = methodDesc.Parameters.Select((x, i) => new ParameterNecessity
{
Description = x,
Codec = codecContainer.GetEmittingCodecFor(x.Type),
LocalVariable = x.Way != MethodParameterWay.Val ? il.DeclareLocal(x.Type) : null,
ArgumentIndex = i
})
.ToArray();
var requestParameters = parameters
.Where(x => x.Description.Way == MethodParameterWay.Val || x.Description.Way == MethodParameterWay.Ref)
.ToArray();
var responseParameters = parameters
.Where(x => x.Description.Way == MethodParameterWay.Ref || x.Description.Way == MethodParameterWay.Out)
.ToArray();
LocalBuilder requestDataPointerVar = null;
if (requestParameters.Any())
{
il.Emit(OpCodes.Ldarg_1); // remainingBytes = arg_1.Length
il.Emit(OpCodes.Ldlen);
il.Emit(OpCodes.Stloc, locals.RemainingBytes);
requestDataPointerVar = // var pinned dataPointer = pin(arg_1)
il.Emit_PinArray(typeof(byte), 1);
il.Emit(OpCodes.Ldloc, requestDataPointerVar); // data = dataPointer
il.Emit(OpCodes.Stloc, locals.DataPointer);
}
foreach (var parameter in parameters)
{
switch (parameter.Description.Way)
{
case MethodParameterWay.Val:
parameter.Codec.EmitDecode(il, locals, false); // stack_i = decode(data, remainingBytes, false)
break;
case MethodParameterWay.Ref:
parameter.Codec.EmitDecode(il, locals, false); // param_i = decode(data, remainingBytes, false)
il.Emit(OpCodes.Stloc, parameter.LocalVariable);
il.Emit(OpCodes.Ldloca, parameter.LocalVariable); // stack_i = *param_i
break;
case MethodParameterWay.Out:
il.Emit(OpCodes.Ldloca, parameter.LocalVariable); // stack_i = *param_i
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (requestParameters.Any())
{
il.Emit_UnpinArray(requestDataPointerVar); // unpin(dataPointer)
}
il.Emit(OpCodes.Callvirt, methodDesc.MethodInfo); // stack_0 = stack_0.Method(stack_1, stack_2, ...)
if (hasRetval || responseParameters.Any())
{
IEmittingCodec retvalCodec = null;
LocalBuilder retvalVar = null;
if (hasRetval)
{
retvalCodec = codecContainer.GetEmittingCodecFor(methodDesc.ReturnType);
retvalVar = il.DeclareLocal(methodDesc.ReturnType); // var ret = stack_0
il.Emit(OpCodes.Stloc, retvalVar);
retvalCodec.EmitCalculateSize(il, retvalVar); // stack_0 = calculateSize(ret)
}
bool hasSizeOnStack = hasRetval;
foreach (var parameter in responseParameters)
{
parameter.Codec.EmitCalculateSize(il, parameter.LocalVariable); // stack_0 += calculateSize(param_i)
if (hasSizeOnStack)
{
il.Emit(OpCodes.Add);
}
else
{
hasSizeOnStack = true;
}
}
var dataArrayVar = il.DeclareLocal(typeof(byte[])); // var dataArray = new byte[size of retval]
il.Emit(OpCodes.Newarr, typeof(byte));
il.Emit(OpCodes.Stloc, dataArrayVar);
var responseDataPointerVar = // var pinned dataPointer = pin(dataArrayVar)
il.Emit_PinArray(typeof(byte), dataArrayVar);
il.Emit(OpCodes.Ldloc, responseDataPointerVar); // data = dataPointer
il.Emit(OpCodes.Stloc, locals.DataPointer);
foreach (var parameter in responseParameters)
{
parameter.Codec.EmitEncode(il, locals, parameter.LocalVariable);// encode(data, param_i)
}
if (hasRetval)
{
retvalCodec.EmitEncode(il, locals, retvalVar); // encode(data, ret)
}
il.Emit_UnpinArray(responseDataPointerVar); // unpin(dataPointer)
il.Emit(OpCodes.Ldloc, dataArrayVar); // stack_0 = dataArray
}
else
{
il.Emit(OpCodes.Ldc_I4, 0); // stack_0 = new byte[0]
il.Emit(OpCodes.Newarr, typeof(byte));
}
il.Emit(OpCodes.Ret);
return((ServiceMethodHandler)dynamicMethod.CreateDelegate(typeof(ServiceMethodHandler)));
}
public ServiceMethodHandler GetMethodHandler(ServiceImplementationInfo serviceImplementationInfo, ServicePath servicePath)
{
return(handlers.GetOrAdd(servicePath, p => factory.CreateMethodHandler(serviceImplementationInfo, p)));
}
public void Setup()
{
codecContainer = new CodecContainer();
factory = new ServiceMethodHandlerFactory(codecContainer);
service = Substitute.For<IGlobalServiceImplementation>();
var serviceDescriptionBuilder = new ServiceDescriptionBuilder(new MethodDescriptionBuilder());
var globalServiceDescription = serviceDescriptionBuilder.Build(typeof(IGlobalService));
globalServiceImplementationInfo =
new ServiceImplementationInfo(typeof(IGlobalService), globalServiceDescription, service);
}
public ServiceMethodHandler GetMethodHandler(ServiceImplementationInfo serviceImplementationInfo, ServicePath servicePath)
{
return handlers.GetOrAdd(servicePath, p => factory.CreateMethodHandler(serviceImplementationInfo, p));
}
