SmokeObject * SmokeObject::fromPtr(void *ptr, const Class *klass,
bool allocated, bool copy)
{
if (!klass)
error("Attempt to create SmokeObject with NULL class");
if (!ptr)
error("Attempt to create SmokeObject with NULL pointer");
SmokeObject *so = instances[ptr];
if (!so) {
so = new SmokeObject(ptr, klass, allocated);
#ifdef MEM_DEBUG
qDebug("%p: created for %p (%s)", so, ptr, klass->name());
#endif
// record this ASAP, resolveClassId() needs it for virtual callbacks
if (allocated) // do not record unallocated; not informed when deleted
instances[so->ptr()] = so;
#ifdef MEM_DEBUG
else qDebug("%p: unallocated, not registering pointer", so);
#endif
so->cast(Class::fromSmokeId(so->smoke(), so->module()->resolveClassId(so)));
/* it seems that all multiple inheritance in Qt goes through
QObject or QEvent, so we can catch offset pointers at run-time */
// FIXME: what happens with other libraries? take QtRuby approach?
#ifdef MEM_DEBUG
if (allocated && so->klass() != klass)
qDebug("%p: class switch %s::%s -> %s::%s", so,
klass->smokeBase()->smoke()->moduleName(),
klass->name(), so->klass()->smokeBase()->smoke()->moduleName(),
so->klass()->name());
#endif
if (so->ptr() != ptr) { // must be multiple inheritance, recache
SmokeObject *tmp_so = instances[so->ptr()];
#ifdef MEM_DEBUG
qDebug("%p: multiple inheritance detected, switch to %p", so, so->ptr());
#endif
if (tmp_so) {
#ifdef MEM_DEBUG
qDebug("%p: replaced with existing %p", so, tmp_so);
#endif
delete so;
so = tmp_so;
copy = false; // don't think we every want to copy here
} else instances[so->ptr()] = so;
instances.remove(ptr);
}
if (copy) { // copy the data
void *tmp_ptr = so->ptr();
so->_ptr = so->clonePtr();
instances[so->ptr()] = so; // update the instances hash after cloning
instances.remove(tmp_ptr);
#ifdef MEM_DEBUG
qDebug("%p: copied to %p", so, so->ptr());
#endif
so->_allocated = true;
}
}
return so;
}
extern "C" SEXP qt_qmetaInvoke(SEXP x, SEXP s_id, SEXP s_args) {
SmokeObject *so = SmokeObject::fromSexp(x);
int id = from_sexp<int>(s_id);
QObject * qobj = reinterpret_cast<QObject *>(so->castPtr("QObject"));
MocMethod method(so->smoke(), qobj->metaObject(), id);
SEXP ret = method.invoke(x, s_args);
if (method.lastError() > Method::NoError)
error("Meta method invocation failed for: '%s::%s'", so->klass()->name(),
method.name());
return ret;
}
/* We catch all qt_metacall invocations */
extern "C" SEXP qt_qmetacall(SEXP x, SEXP s_call, SEXP s_id, SEXP s_args)
{
SmokeObject *so = SmokeObject::fromSexp(x);
QMetaObject::Call call =
enum_from_sexp<QMetaObject::Call>(s_call, SmokeType());
int id = from_sexp<int>(s_id);
void **args = reinterpret_cast<void **>(from_sexp<void *>(s_args));
// Assume the target slot is a C++ one
Smoke::StackItem i[4];
i[1].s_enum = call;
i[2].s_int = id;
i[3].s_voidp = args;
so->invokeMethod("qt_metacall$$?", i);
int ret = i[0].s_int;
if (ret < 0) {
return ScalarInteger(ret);
}
if (call != QMetaObject::InvokeMetaMethod)
return ScalarInteger(id);
QObject * qobj = reinterpret_cast<QObject *>(so->castPtr("QObject"));
// get obj metaobject with a virtual call
const QMetaObject *metaobject = qobj->metaObject();
// get method count
int count = metaobject->methodCount();
QMetaMethod method = metaobject->method(id);
if (method.methodType() == QMetaMethod::Signal) {
// FIXME: this override of 'activate' is obsolete
metaobject->activate(qobj, id, (void**) args);
return ScalarInteger(id - count);
}
DynamicBinding binding(MocMethod(so->smoke(), metaobject, id));
QVector<SmokeType> stackTypes = binding.types();
MocStack mocStack = MocStack(args, stackTypes.size());
SmokeStack smokeStack = mocStack.toSmoke(stackTypes);
binding.invoke(so, smokeStack.items());
mocStack.returnFromSmoke(smokeStack, stackTypes[0]);
if (binding.lastError() == Method::NoError)
warning("Slot invocation failed for %s::%s", so->klass()->name(),
binding.name());
return ScalarInteger(id - count);
}
Method*
MocClass::findMethod(const MethodCall& call) const {
Method *method = _delegate->findMethod(call);
if (method)
return(method);
SmokeObject *o = call.target();
/* only QObjects have meta methods */
if (o && o->ptr() && o->instanceOf("QObject") && o->klass() == this) {
/* unwrap the call */
QObject * qobject = reinterpret_cast<QObject *>(o->castPtr("QObject"));
const QMetaObject * meta = qobject->metaObject();
/* get the method id */
int id = findMethodId(o->smoke(), meta, call.method()->name(), call.args());
if (id >= 0)
method = new MocMethod(o->smoke(), meta, id);
}
return method;
}
