private void ImplementSignal(SignalDescription signalDescription, bool isPropertiesChanged)
{
var method = _typeBuilder.ImplementInterfaceMethod(signalDescription.MethodInfo);
ILGenerator ilg = method.GetILGenerator();
// call Watch(...)
// BusObject (this)
ilg.Emit(OpCodes.Ldarg_0);
ilg.Emit(OpCodes.Castclass, s_dbusObjectProxyType);
// Interface
ilg.Emit(OpCodes.Ldstr, signalDescription.Interface.Name);
// Member
ilg.Emit(OpCodes.Ldstr, signalDescription.Name);
// Action<Exception>
if (signalDescription.HasOnError)
{
ilg.Emit(OpCodes.Ldarg_2);
}
else
{
ilg.Emit(OpCodes.Ldnull);
}
// Action/Action<>
ilg.Emit(OpCodes.Ldarg_1);
if (signalDescription.SignalType != null)
{
// ReadMethodDelegate
ilg.Emit(OpCodes.Ldnull);
ilg.Emit(OpCodes.Ldftn, ReadMethodFactory.CreateReadMethodForType(signalDescription.SignalType));
var readDelegateConstructor = s_readMethodDelegateGenericType.MakeGenericType(new[] { signalDescription.SignalType }).GetConstructors()[0];
ilg.Emit(OpCodes.Newobj, readDelegateConstructor);
// isPropertiesChanged
ilg.Emit(isPropertiesChanged ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0);
// Watch
ilg.Emit(OpCodes.Call, s_watchNonVoidSignal.MakeGenericMethod(new[] { signalDescription.SignalType }));
}
else
{
// Watch
ilg.Emit(OpCodes.Call, s_watchVoidSignal);
}
ilg.Emit(OpCodes.Ret);
}
private MethodInfo GenMethodHandler(string key, MethodDescription dbusMethod, bool propertyMethod)
{
// Task<Message> MethodCall(object o(Ldarg_1), Message methodCall(Ldarg_2), IProxyFactory(Ldarg_3));
string methodName = $"Handle{key}".Replace('.', '_');
var method = _typeBuilder.DefineMethod(methodName, MethodAttributes.Private, s_taskOfMessageType, s_methodHandlerParameterTypes);
var ilg = method.GetILGenerator();
// call CreateReply
// this
ilg.Emit(OpCodes.Ldarg_0);
// Message
ilg.Emit(OpCodes.Ldarg_2);
// Task = (IDbusInterface)object.CallMethod(arguments)
{
// (IIinterface)object
ilg.Emit(OpCodes.Ldarg_1);
ilg.Emit(OpCodes.Castclass, dbusMethod.Interface.Type);
// Arguments
if (dbusMethod.InArguments.Count != 0)
{
// create reader for reading the arguments
ilg.Emit(OpCodes.Ldarg_2); // message
ilg.Emit(OpCodes.Ldarg_3); // IProxyFactory
LocalBuilder reader = ilg.DeclareLocal(s_messageReaderType);
ilg.Emit(OpCodes.Newobj, s_messageReaderConstructor); // new MessageReader(message, proxyFactory)
ilg.Emit(OpCodes.Stloc, reader);
if (propertyMethod)
{
ilg.Emit(OpCodes.Ldloc, reader);
ilg.Emit(OpCodes.Call, s_readerSkipString);
}
foreach (var argument in dbusMethod.InArguments)
{
Type parameterType = argument.Type;
ilg.Emit(OpCodes.Ldloc, reader);
ilg.Emit(OpCodes.Call, ReadMethodFactory.CreateReadMethodForType(parameterType));
}
}
// Call method
ilg.Emit(OpCodes.Callvirt, dbusMethod.MethodInfo);
}
if (dbusMethod.OutType != null)
{
// Action<MessageWriter, T>
ilg.Emit(OpCodes.Ldnull);
ilg.Emit(OpCodes.Ldftn, WriteMethodFactory.CreateWriteMethodForType(dbusMethod.OutType, isCompileTimeType: true));
var actionConstructor = s_action2GenericType.MakeGenericType(new[] { s_messageWriterType, dbusMethod.OutType }).GetConstructors()[0];
ilg.Emit(OpCodes.Newobj, actionConstructor);
// signature
if (dbusMethod.OutSignature.HasValue)
{
ilg.Emit(OpCodes.Ldstr, dbusMethod.OutSignature.Value.Value);
ilg.Emit(OpCodes.Newobj, s_signatureConstructor);
ilg.Emit(OpCodes.Newobj, s_nullableSignatureConstructor);
}
else
{
LocalBuilder signature = ilg.DeclareLocal(s_nullableSignatureType);
ilg.Emit(OpCodes.Ldloca_S, signature);
ilg.Emit(OpCodes.Initobj, s_nullableSignatureType);
ilg.Emit(OpCodes.Ldloc, signature);
}
// CreateReply
ilg.Emit(OpCodes.Call, s_createNonVoidReply.MakeGenericMethod(new[] { dbusMethod.OutType }));
}
else
{
// CreateReply
ilg.Emit(OpCodes.Call, s_createVoidReply);
}
ilg.Emit(OpCodes.Ret);
return(method);
}
private void ImplementMethod(MethodDescription methodDescription, bool propertyMethod)
{
var method = _typeBuilder.ImplementInterfaceMethod(methodDescription.MethodInfo);
ILGenerator ilg = method.GetILGenerator();
//CallMethod(...)
// BusObject (this)
ilg.Emit(OpCodes.Ldarg_0);
ilg.Emit(OpCodes.Castclass, s_dbusObjectProxyType);
// Interface
if (propertyMethod)
{
ilg.Emit(OpCodes.Ldstr, "org.freedesktop.DBus.Properties");
}
else
{
ilg.Emit(OpCodes.Ldstr, methodDescription.Interface.Name);
}
// Member
ilg.Emit(OpCodes.Ldstr, methodDescription.Name);
// Signature
if (methodDescription.InSignature.HasValue || propertyMethod)
{
string inSig = methodDescription.InSignature?.Value ?? string.Empty;
if (propertyMethod)
{
inSig = "s" + inSig;
}
ilg.Emit(OpCodes.Ldstr, inSig);
ilg.Emit(OpCodes.Newobj, s_signatureConstructor);
ilg.Emit(OpCodes.Newobj, s_nullableSignatureConstructor);
}
else
{
LocalBuilder signature = ilg.DeclareLocal(s_nullableSignatureType);
ilg.Emit(OpCodes.Ldloca_S, signature);
ilg.Emit(OpCodes.Initobj, s_nullableSignatureType);
ilg.Emit(OpCodes.Ldloc, signature);
}
// MessageWriter
var argumentOffset = 1; //offset by one to account for "this"
if (methodDescription.InArguments.Count != 0 || propertyMethod)
{
LocalBuilder writer = ilg.DeclareLocal(s_messageWriterType);
ilg.Emit(OpCodes.Newobj, s_messageWriterConstructor);
ilg.Emit(OpCodes.Stloc, writer);
if (propertyMethod)
{
// Write parameter
Type parameterType = typeof(string);
ilg.Emit(OpCodes.Ldloc, writer);
ilg.Emit(OpCodes.Ldstr, methodDescription.Interface.Name);
ilg.Emit(OpCodes.Call, WriteMethodFactory.CreateWriteMethodForType(parameterType, isCompileTimeType: true));
}
foreach (var argument in methodDescription.InArguments)
{
// Write parameter
Type parameterType = argument.Type;
ilg.Emit(OpCodes.Ldloc, writer);
ilg.Emit(OpCodes.Ldarg, argumentOffset);
ilg.Emit(OpCodes.Call, WriteMethodFactory.CreateWriteMethodForType(parameterType, isCompileTimeType: true));
argumentOffset++;
}
ilg.Emit(OpCodes.Ldloc, writer);
}
else
{
ilg.Emit(OpCodes.Ldnull);
}
if (methodDescription.OutType != null)
{
// CallMethod
if (methodDescription.IsGenericOut)
{
Type genericParameter = method.GetGenericArguments()[0];
ilg.Emit(OpCodes.Call, s_callGenericOutMethod.MakeGenericMethod(new[] { genericParameter }));
}
else
{
// ReadMethodDelegate
ilg.Emit(OpCodes.Ldnull);
ilg.Emit(OpCodes.Ldftn, ReadMethodFactory.CreateReadMethodForType(methodDescription.OutType));
var readDelegateConstructor = s_readMethodDelegateGenericType.MakeGenericType(new[] { methodDescription.OutType }).GetConstructors()[0];
ilg.Emit(OpCodes.Newobj, readDelegateConstructor);
ilg.Emit(OpCodes.Call, s_callNonVoidMethod.MakeGenericMethod(new[] { methodDescription.OutType }));
}
}
else
{
// CallMethod
ilg.Emit(OpCodes.Call, s_callVoidMethod);
}
ilg.Emit(OpCodes.Ret);
}