Merge "Don't retry starting the artd_pre_reboot service." into main

    /** A class that exposes the method to obtain each system service. */

    public static final class ServiceRegisterer {

        @NonNull private final String mServiceName;

        private final boolean mRetry;

        /** @hide */

        public ServiceRegisterer(@NonNull String serviceName) {

        public ServiceRegisterer(@NonNull String serviceName, boolean retry) {

            mServiceName = serviceName;

            mRetry = retry;

        }

        /**

         */

        @Nullable

        public IBinder waitForService() {

            if (mRetry) {

                return ServiceManager.waitForService(mServiceName);

            }

            IBinder binder = ServiceManager.getService(mServiceName);

            for (int remainingTimeMs = 5000; binder == null && remainingTimeMs > 0;

                    remainingTimeMs -= 100) {

                // There can be a race:

                // 1. Client A invokes "ctl.start", which starts the service.

                // 2. Client A gets a service handle from `ServiceManager.getService`.

                // 3. Client B invokes "ctl.start", which does nothing because the service is

                //    already running.

                // 4. Client A drops the service handle. The service is notified that there is no

                //    more client at that point, so it shuts down itself.

                // 5. Client B cannot get a service handle from `ServiceManager.getService` because

                //    the service is shut down.

                // To address this problem, we invoke "ctl.start" repeatedly.

                SystemProperties.set("ctl.start", mServiceName);

                SystemClock.sleep(100);

                binder = ServiceManager.getService(mServiceName);

            }

            return binder;

        }

    }

    /** Returns {@link ServiceRegisterer} for the "artd" service. */

    @NonNull

    public ServiceRegisterer getArtdServiceRegisterer() {

        return new ServiceRegisterer("artd");

        return new ServiceRegisterer("artd", true /* retry */);

    }

    /** Returns {@link ServiceRegisterer} for the "artd_pre_reboot" service. */

    @NonNull

    @FlaggedApi(Flags.FLAG_USE_ART_SERVICE_V2)

    public ServiceRegisterer getArtdPreRebootServiceRegisterer() {

        return new ServiceRegisterer("artd_pre_reboot");

        return new ServiceRegisterer("artd_pre_reboot", false /* retry */);

    }

    /** Returns {@link ServiceRegisterer} for the "dexopt_chroot_setup" service. */

    @NonNull

    @FlaggedApi(Flags.FLAG_USE_ART_SERVICE_V2)

    public ServiceRegisterer getDexoptChrootSetupServiceRegisterer() {

        return new ServiceRegisterer("dexopt_chroot_setup");

        return new ServiceRegisterer("dexopt_chroot_setup", true /* retry */);

    }

}