Merge "sf: Remember that AIDL Power HAL isn't present" into rvc-dev

    static std::unique_ptr<HalWrapper> connect() {

        // Power HAL 1.3 is not guaranteed to be available, thus we need to query

        // Power HAL 1.0 first and try to cast it to Power HAL 1.3.

        // Power HAL 1.0 is always available, thus if we fail to query it, it means

        // Power HAL is not available temporarily and we should retry later. However,

        // if Power HAL 1.0 is available and we can't cast it to Power HAL 1.3,

        // it means Power HAL 1.3 is not available at all, so we should stop trying.

        sp<V1_3::IPower> powerHal = nullptr;

        if (sHasPowerHal_1_3) {

        sp<V1_0::IPower> powerHal_1_0 = V1_0::IPower::getService();

        if (powerHal_1_0 != nullptr) {

            // Try to cast to Power HAL 1.3

            powerHal = V1_3::IPower::castFrom(powerHal_1_0);

            if (powerHal == nullptr) {

                    ALOGW("No Power HAL 1.3 service in system");

                    sHasPowerHal_1_3 = false;

                ALOGW("No Power HAL 1.3 service in system, disabling PowerAdvisor");

            } else {

                ALOGI("Loaded Power HAL 1.3 service");

            }

        } else {

            ALOGW("No Power HAL found, disabling PowerAdvisor");

        }

        }

        if (powerHal == nullptr) {

            return nullptr;

        }

    }

private:

    static bool sHasPowerHal_1_3;

    const sp<V1_3::IPower> mPowerHal = nullptr;

};

bool HidlPowerHalWrapper::sHasPowerHal_1_3 = true;

class AidlPowerHalWrapper : public PowerAdvisor::HalWrapper {

public:

    AidlPowerHalWrapper(sp<IPower> powerHal) : mPowerHal(std::move(powerHal)) {

PowerAdvisor::HalWrapper* PowerAdvisor::getPowerHal() {

    static std::unique_ptr<HalWrapper> sHalWrapper = nullptr;

    static bool sHasHal = true;

    if (!sHasHal) {

        return nullptr;

    }

    // If we used to have a HAL, but it stopped responding, attempt to reconnect

    if (mReconnectPowerHal) {

        sHalWrapper = nullptr;

        mReconnectPowerHal = false;

        sHalWrapper = HidlPowerHalWrapper::connect();

    }

    // If we make it to this point and still don't have a HAL, it's unlikely we

    // will, so stop trying

    if (sHalWrapper == nullptr) {

        sHasHal = false;

    }

    return sHalWrapper.get();

}