SignalBase::SignalBase(const qi::Signature& sig, OnSubscribers onSubscribers)
: _p(new SignalBasePrivate)
{
//Dynamic mean AnyArguments here.
if (sig.type() != qi::Signature::Type_Dynamic && sig.type() != qi::Signature::Type_Tuple)
throw std::runtime_error("Signal signature should be tuple, or AnyArguments");
_p->onSubscribers = onSubscribers;
_p->signature = sig;
}
//convert args then call setValues
void Message::setValues(const std::vector<qi::AnyReference>& in, const qi::Signature& expectedSignature, ObjectHost* context, StreamContext* streamContext) {
qi::Signature argsSig = qi::makeTupleSignature(in, false);
if (expectedSignature == argsSig) {
setValues(in, context, streamContext);
return;
}
if (expectedSignature == "m")
{
/* We need to send a dynamic containing the value tuple to push the
* signature. This wraps correctly without copying the data.
*/
std::vector<qi::TypeInterface*> types;
std::vector<void*> values;
types.resize(in.size());
values.resize(in.size());
for (unsigned i=0; i<in.size(); ++i)
{
types[i] = in[i].type();
values[i] = in[i].rawValue();
}
AnyReference tuple = makeGenericTuplePtr(types, values);
AnyValue val(tuple, false, false);
encodeBinary(&_p->buffer, AnyReference::from(val), boost::bind(serializeObject, _1, context), streamContext);
return;
}
/* This check does not makes sense for this transport layer who does not care,
* But it checks a general rule that is true for all the messages we use and
* it can help catch many mistakes.
*/
if (expectedSignature.type() != Signature::Type_Tuple)
throw std::runtime_error("Expected a tuple, got " + expectedSignature.toString());
AnyReferenceVector nargs(in);
SignatureVector src = argsSig.children();
SignatureVector dst = expectedSignature.children();
if (src.size() != dst.size())
throw std::runtime_error("remote call: signature size mismatch");
SignatureVector::iterator its = src.begin(), itd = dst.begin();
boost::dynamic_bitset<> allocated(nargs.size());
for (unsigned i = 0; i< nargs.size(); ++i, ++its, ++itd)
{
if (*its != *itd)
{
::qi::TypeInterface* target = ::qi::TypeInterface::fromSignature(*itd);
if (!target)
throw std::runtime_error("remote call: Failed to obtain a type from signature " + (*itd).toString());
std::pair<AnyReference, bool> c = nargs[i].convert(target);
if (!c.first.type())
{
throw std::runtime_error(
_QI_LOG_FORMAT("remote call: failed to convert argument %s from %s to %s", i, (*its).toString(), (*itd).toString()));
}
nargs[i] = c.first;
allocated[i] = c.second;
}
}
setValues(nargs, context, streamContext);
for (unsigned i = 0; i< nargs.size(); ++i)
if (allocated[i])
nargs[i].destroy();
}
void SignatureConvertor::visit(const qi::Signature& sig) {
switch(sig.type()) {
case '[':
visitList(sig);
break;
case '{':
visitMap(sig);
break;
case '(':
visitTuple(sig);
break;
case '#':
visitVarArgs(sig);
break;
default:
visitSimple(sig);
break;
}
}