Merge "libbinder: add hints to waitForService error" am: ea830510 am: c82f3925 am: bc592752

    while(true) {

        {

            // It would be really nice if we could read binder commands on this

            // thread instead of needing a threadpool to be started, but for

            // instance, if we call getAndExecuteCommand, it might be the case

            // that another thread serves the callback, and we never get a

            // command, so we hang indefinitely.

            std::unique_lock<std::mutex> lock(waiter->mMutex);

            using std::literals::chrono_literals::operator""s;

            waiter->mCv.wait_for(lock, 1s, [&] {

            if (waiter->mBinder != nullptr) return waiter->mBinder;

        }

        ALOGW("Waited one second for %s (is service started? are binder threads started and available?)", name.c_str());

        // Handle race condition for lazy services. Here is what can happen:

        // - the service dies (not processed by init yet).

        // - sm processes death notification.

            return nullptr;

        }

        if (out != nullptr) return out;

        ALOGW("Waited one second for %s", name.c_str());

    }

}