void ObservableHandler::_handleAddObserver(
BMessage* message) {
#if DEBUG
BLooper* l = Looper();
ASSERT(l);
ASSERT(l->IsLocked());
#endif
BMessage reply;
BMessenger observer;
status_t err = message->FindMessenger(
"observer", &observer);
if(err < B_OK) {
PRINT((
"* ObservableHandler::_handleAddObserver(): no observer specified!\n"));
// send reply? +++++
return;
}
if(m_released) {
// already quitting
reply.what = M_BAD_TARGET;
reply.AddMessenger("target", BMessenger(this));
reply.AddMessenger("observer", observer);
message->SendReply(&reply);
return;
}
else if(IndexOfTarget(observer.Target(0)) != -1) {
// observer already added
reply.what = M_BAD_OBSERVER;
reply.AddMessenger("target", BMessenger(this));
reply.AddMessenger("observer", observer);
message->SendReply(&reply);
return;
}
// valid observer given
// add it
err = AddTarget(observer.Target(0));
ASSERT(err == B_OK);
// call hook
observerAdded(observer);
}
void ObservableLooper::_handleAddObserver(
BMessage* message) {
BMessage reply;
BMessenger observer;
status_t err = message->FindMessenger(
"observer", &observer);
if(err < B_OK) {
PRINT((
"* ObservableLooper::_handleAddObserver(): no observer specified!\n"));
// send reply? +++++
return;
}
// at this point, a reply of some sort will be sent
reply.AddMessenger("target", BMessenger(this));
reply.AddMessenger("observer", observer);
if(m_quitting) {
// already quitting
reply.what = M_BAD_TARGET;
}
else if(IndexOfTarget(observer.Target(0)) != -1) {
// observer already added
reply.what = M_BAD_OBSERVER;
}
else {
// add it
err = AddTarget(observer.Target(0));
ASSERT(err == B_OK);
reply.what = M_OBSERVER_ADDED;
}
// send reply
message->SendReply(&reply);
// call hook
observerAdded(observer);
}
