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::_handleRemoveObserver(
BMessage* message) {
// PRINT(("ObservableLooper::_handleRemoveObserver():\n"
// " %ld targets\n", CountTargets()));
BMessage reply;
BMessenger observer;
status_t err = message->FindMessenger(
"observer", &observer);
if(err < B_OK) {
PRINT((
"* ObservableLooper::_handleRemoveObserver(): 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);
int32 index = IndexOfTarget(observer.Target(0));
if(index == -1) {
reply.what = M_BAD_OBSERVER;
}
else {
RemoveTarget(index);
reply.what = M_OBSERVER_REMOVED;
}
message->SendReply(&reply);
// call hook
observerRemoved(observer);
// time to shut down?
if(m_quitting && !CountTargets()) {
releaseComplete();
BLooper::Quit();
}
}
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);
}
void ObservableHandler::_handleRemoveObserver(
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::_handleRemoveObserver(): no observer specified!\n"));
// send reply? +++++
return;
}
int32 index = IndexOfTarget(observer.Target(0));
if(index == -1) {
reply.what = M_BAD_OBSERVER;
reply.AddMessenger("target", BMessenger(this));
reply.AddMessenger("observer", observer);
message->SendReply(&reply);
return;
}
// valid observer given; remove it & call notification hook
RemoveTarget(index);
observerRemoved(observer);
// time to shut down?
if(m_released && !CountTargets()) {
releaseComplete();
delete this; // BOOM!
}
}
