private PInvokeILEmitter(MethodDesc targetMethod, PInvokeILEmitterConfiguration pinvokeILEmitterConfiguration)
{
Debug.Assert(targetMethod.IsPInvoke || targetMethod is DelegateMarshallingMethodThunk);
_methodData = new PInvokeMethodData(targetMethod, pinvokeILEmitterConfiguration);
_marshallers = InitializeMarshallers(_methodData);
}
private static Marshaller[] InitializeMarshallers(PInvokeMethodData pInvokeMethodData)
{
MethodDesc targetMethod = pInvokeMethodData.TargetMethod;
bool isDelegate = targetMethod is DelegateMarshallingMethodThunk;
MethodSignature methodSig = isDelegate ? ((DelegateMarshallingMethodThunk)targetMethod).DelegateSignature : targetMethod.Signature;
ParameterMetadata[] parameterMetadataArray = targetMethod.GetParameterMetadata();
Marshaller[] marshallers = new Marshaller[methodSig.Length + 1];
int parameterIndex = 0;
ParameterMetadata parameterMetadata = new ParameterMetadata();
for (int i = 0; i < marshallers.Length; i++)
{
Debug.Assert(parameterIndex == parameterMetadataArray.Length || i <= parameterMetadataArray[parameterIndex].Index);
if (parameterIndex == parameterMetadataArray.Length || i < parameterMetadataArray[parameterIndex].Index)
{
// if we don't have metadata for the parameter, create a dummy one
parameterMetadata = new ParameterMetadata(i, ParameterMetadataAttributes.None, null);
}
else if (i == parameterMetadataArray[parameterIndex].Index)
{
parameterMetadata = parameterMetadataArray[parameterIndex++];
}
TypeDesc parameterType = (i == 0) ? methodSig.ReturnType : methodSig[i - 1]; //first item is the return type
marshallers[i] = Marshaller.CreateMarshaller(parameterType,
pInvokeMethodData,
parameterMetadata,
marshallers,
isDelegate ? MarshalDirection.Reverse : MarshalDirection.Forward);
}
return(marshallers);
}
private PInvokeILEmitter(MethodDesc targetMethod, PInvokeILEmitterConfiguration pinvokeILEmitterConfiguration)
{
Debug.Assert(targetMethod.IsPInvoke);
_methodData = new PInvokeMethodData(targetMethod, pinvokeILEmitterConfiguration, MarshalDirection.Forward);
_marshallers = InitializeMarshallers(_methodData);
}
