healthd: notify listeners using local copy of list, drop lock

}

void BatteryPropertiesRegistrar::notifyListeners(const struct BatteryProperties& props) {

    Vector<sp<IBatteryPropertiesListener> > listenersCopy;

    // Binder currently may service an incoming oneway transaction whenever an

    // outbound oneway call is made (if there is already a pending incoming

    // oneway call waiting).  This is considered a bug and may change in the

    // future.  For now, avoid recursive mutex lock while making outbound

    // calls by making a local copy of the current list of listeners.

    {

        Mutex::Autolock _l(mRegistrationLock);

    for (size_t i = 0; i < mListeners.size(); i++) {

        mListeners[i]->batteryPropertiesChanged(props);

        listenersCopy = mListeners;

    }

    for (size_t i = 0; i < listenersCopy.size(); i++) {

        listenersCopy[i]->batteryPropertiesChanged(props);

    }

}