ObservableHandler::~ObservableHandler() {
if(CountTargets()) {
PRINT((
"*** ~ObservableHandler() '%s': %" B_PRId32 " observers remain\n",
Name(), CountTargets()));
}
}
ObservableLooper::~ObservableLooper() {
if(CountTargets()) {
PRINT((
"*** ~ObservableLooper() '%s': %ld observers remain\n",
Name(), CountTargets()));
}
if(m_executioner)
delete m_executioner;
}
bool ObservableLooper::QuitRequested() {
if(CountTargets()) {
if(!m_quitting) {
m_quitting = true;
// no release request yet sent
notifyRelease();
if(m_quitTimeout != B_INFINITE_TIMEOUT) {
// Initiate a timer to force quit -- if an observer
// has died, it shouldn't take me down with it.
ASSERT(!m_executioner);
m_executioner = new BMessageRunner(
BMessenger(this),
new BMessage(M_KILL_OBSERVABLE),
m_quitTimeout,
1);
}
}
// targets remain, so don't quit.
return false;
}
// okay to quit
return true;
}
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 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!
}
}
__USE_CORTEX_NAMESPACE
// ---------------------------------------------------------------- //
// *** deletion
// ---------------------------------------------------------------- //
// clients must call release() rather than deleting,
// to ensure that all observers are notified of the
// object's demise. if the object has already been
// released, return an error.
status_t ObservableHandler::release() {
if(m_released)
return B_NOT_ALLOWED;
// PRINT((
// "ObservableHandler::release(): %ld targets\n", CountTargets()));
if(!LockLooper()) {
ASSERT(!"failed to lock looper");
}
m_released = true;
if(CountTargets()) {
// notify
notifyRelease();
UnlockLooper();
}
else {
releaseComplete();
UnlockLooper();
delete this;
}
return B_OK;
}
