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Commit 33acf9fb authored by Anthony Stange's avatar Anthony Stange
Browse files

V2: Set up Multi-HAL for Sensors HAL 2.1

Bug: 149758467
Test: Load onto device and verify VTS passes
Test: Verify new fake subhals load properly and that unit tests pass
that have been updated in this topic

Change-Id: Ie73458b3447dab80f6b692e55832ef562636bfdb
parent 5a49885b
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+7 −1
Original line number Diff line number Diff line
@@ -25,6 +25,9 @@ cc_binary {
    ],
    init_rc: ["android.hardware.sensors@2.0-service-multihal.rc"],
    vintf_fragments: ["android.hardware.sensors@2.0-multihal.xml"],
    header_libs: [
        "android.hardware.sensors@2.X-shared-utils",
    ],
    shared_libs: [
        "android.hardware.sensors@2.0",
        "android.hardware.sensors@2.0-ScopedWakelock",
@@ -37,5 +40,8 @@ cc_binary {
        "libpower",
        "libutils",
    ],
    static_libs: ["android.hardware.sensors@2.X-multihal"],
    static_libs: [
        "android.hardware.sensors@1.0-convert",
        "android.hardware.sensors@2.X-multihal",
    ],
}
+2 −2
Original line number Diff line number Diff line
@@ -23,12 +23,12 @@
using android::hardware::configureRpcThreadpool;
using android::hardware::joinRpcThreadpool;
using android::hardware::sensors::V2_0::ISensors;
using android::hardware::sensors::V2_0::implementation::HalProxy;
using android::hardware::sensors::V2_1::implementation::HalProxyV2_0;

int main(int /* argc */, char** /* argv */) {
    configureRpcThreadpool(1, true);

    android::sp<ISensors> halProxy = new HalProxy();
    android::sp<ISensors> halProxy = new HalProxyV2_0();
    if (halProxy->registerAsService() != ::android::OK) {
        ALOGE("Failed to register Sensors HAL instance");
        return -1;
+5 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ cc_defaults {
    name: "android.hardware.sensors@2.X-multihal-defaults",
    header_libs: [
        "android.hardware.sensors@2.X-multihal.header",
        "android.hardware.sensors@2.X-shared-utils",
    ],
    shared_libs: [
        "android.hardware.sensors@1.0",
@@ -30,6 +31,9 @@ cc_defaults {
        "libpower",
        "libutils",
    ],
    static_libs: [
        "android.hardware.sensors@1.0-convert",
    ],
    cflags: ["-DLOG_TAG=\"SensorsMultiHal\""],
}

@@ -62,6 +66,7 @@ cc_library_static {
    ],
    srcs: [
        "HalProxy.cpp",
        "HalProxyCallback.cpp",
    ],
    vendor_available: true,
    export_header_lib_headers: [
+120 −85
Original line number Diff line number Diff line
@@ -32,15 +32,17 @@
namespace android {
namespace hardware {
namespace sensors {
namespace V2_0 {
namespace V2_1 {
namespace implementation {

using ::android::hardware::sensors::V1_0::Result;
using ::android::hardware::sensors::V2_0::EventQueueFlagBits;
using ::android::hardware::sensors::V2_0::WakeLockQueueFlagBits;
using ::android::hardware::sensors::V2_0::implementation::getTimeNow;
using ::android::hardware::sensors::V2_0::implementation::kWakelockTimeoutNs;

typedef ISensorsSubHal*(SensorsHalGetSubHalFunc)(uint32_t*);
typedef V2_0::implementation::ISensorsSubHal*(SensorsHalGetSubHalFunc)(uint32_t*);
typedef V2_1::implementation::ISensorsSubHal*(SensorsHalGetSubHalV2_1Func)(uint32_t*);

static constexpr int32_t kBitsAfterSubHalIndex = 24;

@@ -85,7 +87,24 @@ HalProxy::HalProxy() {
    init();
}

HalProxy::HalProxy(std::vector<ISensorsSubHal*>& subHalList) : mSubHalList(subHalList) {
HalProxy::HalProxy(std::vector<ISensorsSubHalV2_0*>& subHalList) {
    for (ISensorsSubHalV2_0* subHal : subHalList) {
        mSubHalList.push_back(std::make_unique<SubHalWrapperV2_0>(subHal));
    }

    init();
}

HalProxy::HalProxy(std::vector<ISensorsSubHalV2_0*>& subHalList,
                   std::vector<ISensorsSubHalV2_1*>& subHalListV2_1) {
    for (ISensorsSubHalV2_0* subHal : subHalList) {
        mSubHalList.push_back(std::make_unique<SubHalWrapperV2_0>(subHal));
    }

    for (ISensorsSubHalV2_1* subHal : subHalListV2_1) {
        mSubHalList.push_back(std::make_unique<SubHalWrapperV2_1>(subHal));
    }

    init();
}

@@ -93,8 +112,8 @@ HalProxy::~HalProxy() {
    stopThreads();
}

Return<void> HalProxy::getSensorsList(getSensorsList_cb _hidl_cb) {
    std::vector<SensorInfo> sensors;
Return<void> HalProxy::getSensorsList_2_1(ISensorsV2_1::getSensorsList_2_1_cb _hidl_cb) {
    std::vector<V2_1::SensorInfo> sensors;
    for (const auto& iter : mSensors) {
        sensors.push_back(iter.second);
    }
@@ -102,22 +121,31 @@ Return<void> HalProxy::getSensorsList(getSensorsList_cb _hidl_cb) {
    return Void();
}

Return<void> HalProxy::getSensorsList(ISensorsV2_0::getSensorsList_cb _hidl_cb) {
    std::vector<V1_0::SensorInfo> sensors;
    for (const auto& iter : mSensors) {
        sensors.push_back(convertToOldSensorInfo(iter.second));
    }
    _hidl_cb(sensors);
    return Void();
}

Return<Result> HalProxy::setOperationMode(OperationMode mode) {
    Result result = Result::OK;
    size_t subHalIndex;
    for (subHalIndex = 0; subHalIndex < mSubHalList.size(); subHalIndex++) {
        ISensorsSubHal* subHal = mSubHalList[subHalIndex];
        result = subHal->setOperationMode(mode);
        result = mSubHalList[subHalIndex]->setOperationMode(mode);
        if (result != Result::OK) {
            ALOGE("setOperationMode failed for SubHal: %s", subHal->getName().c_str());
            ALOGE("setOperationMode failed for SubHal: %s",
                  mSubHalList[subHalIndex]->getName().c_str());
            break;
        }
    }

    if (result != Result::OK) {
        // Reset the subhal operation modes that have been flipped
        for (size_t i = 0; i < subHalIndex; i++) {
            ISensorsSubHal* subHal = mSubHalList[i];
            subHal->setOperationMode(mCurrentOperationMode);
            mSubHalList[i]->setOperationMode(mCurrentOperationMode);
        }
    } else {
        mCurrentOperationMode = mode;
@@ -133,10 +161,42 @@ Return<Result> HalProxy::activate(int32_t sensorHandle, bool enabled) {
            ->activate(clearSubHalIndex(sensorHandle), enabled);
}

Return<Result> HalProxy::initialize_2_1(
        const ::android::hardware::MQDescriptorSync<V2_1::Event>& eventQueueDescriptor,
        const ::android::hardware::MQDescriptorSync<uint32_t>& wakeLockDescriptor,
        const sp<V2_1::ISensorsCallback>& sensorsCallback) {
    sp<ISensorsCallbackWrapperBase> dynamicCallback =
            new ISensorsCallbackWrapperV2_1(sensorsCallback);

    // Create the Event FMQ from the eventQueueDescriptor. Reset the read/write positions.
    auto eventQueue =
            std::make_unique<EventMessageQueueV2_1>(eventQueueDescriptor, true /* resetPointers */);
    std::unique_ptr<EventMessageQueueWrapperBase> queue =
            std::make_unique<EventMessageQueueWrapperV2_1>(eventQueue);

    return initializeCommon(queue, wakeLockDescriptor, dynamicCallback);
}

Return<Result> HalProxy::initialize(
        const ::android::hardware::MQDescriptorSync<Event>& eventQueueDescriptor,
        const ::android::hardware::MQDescriptorSync<V1_0::Event>& eventQueueDescriptor,
        const ::android::hardware::MQDescriptorSync<uint32_t>& wakeLockDescriptor,
        const sp<V2_0::ISensorsCallback>& sensorsCallback) {
    sp<ISensorsCallbackWrapperBase> dynamicCallback =
            new ISensorsCallbackWrapperV2_0(sensorsCallback);

    // Create the Event FMQ from the eventQueueDescriptor. Reset the read/write positions.
    auto eventQueue =
            std::make_unique<EventMessageQueueV2_0>(eventQueueDescriptor, true /* resetPointers */);
    std::unique_ptr<EventMessageQueueWrapperBase> queue =
            std::make_unique<EventMessageQueueWrapperV1_0>(eventQueue);

    return initializeCommon(queue, wakeLockDescriptor, dynamicCallback);
}

Return<Result> HalProxy::initializeCommon(
        std::unique_ptr<EventMessageQueueWrapperBase>& eventQueue,
        const ::android::hardware::MQDescriptorSync<uint32_t>& wakeLockDescriptor,
        const sp<ISensorsCallback>& sensorsCallback) {
        const sp<ISensorsCallbackWrapperBase>& sensorsCallback) {
    Result result = Result::OK;

    stopThreads();
@@ -147,7 +207,7 @@ Return<Result> HalProxy::initialize(
    disableAllSensors();

    // Clears the queue if any events were pending write before.
    mPendingWriteEventsQueue = std::queue<std::pair<std::vector<Event>, size_t>>();
    mPendingWriteEventsQueue = std::queue<std::pair<std::vector<V2_1::Event>, size_t>>();
    mSizePendingWriteEventsQueue = 0;

    // Clears previously connected dynamic sensors
@@ -156,8 +216,7 @@ Return<Result> HalProxy::initialize(
    mDynamicSensorsCallback = sensorsCallback;

    // Create the Event FMQ from the eventQueueDescriptor. Reset the read/write positions.
    mEventQueue =
            std::make_unique<EventMessageQueue>(eventQueueDescriptor, true /* resetPointers */);
    mEventQueue = std::move(eventQueue);

    // Create the Wake Lock FMQ that is used by the framework to communicate whenever WAKE_UP
    // events have been successfully read and handled by the framework.
@@ -186,12 +245,10 @@ Return<Result> HalProxy::initialize(
    mWakelockThread = std::thread(startWakelockThread, this);

    for (size_t i = 0; i < mSubHalList.size(); i++) {
        auto subHal = mSubHalList[i];
        const auto& subHalCallback = mSubHalCallbacks[i];
        Result currRes = subHal->initialize(subHalCallback);
        Result currRes = mSubHalList[i]->initialize(this, this, i);
        if (currRes != Result::OK) {
            result = currRes;
            ALOGE("Subhal '%s' failed to initialize.", subHal->getName().c_str());
            ALOGE("Subhal '%s' failed to initialize.", mSubHalList[i]->getName().c_str());
            break;
        }
    }
@@ -217,7 +274,11 @@ Return<Result> HalProxy::flush(int32_t sensorHandle) {
    return getSubHalForSensorHandle(sensorHandle)->flush(clearSubHalIndex(sensorHandle));
}

Return<Result> HalProxy::injectSensorData(const Event& event) {
Return<Result> HalProxy::injectSensorData_2_1(const V2_1::Event& event) {
    return injectSensorData(convertToOldEvent(event));
}

Return<Result> HalProxy::injectSensorData(const V1_0::Event& event) {
    Result result = Result::OK;
    if (mCurrentOperationMode == OperationMode::NORMAL &&
        event.sensorType != V1_0::SensorType::ADDITIONAL_INFO) {
@@ -226,18 +287,19 @@ Return<Result> HalProxy::injectSensorData(const Event& event) {
        result = Result::BAD_VALUE;
    }
    if (result == Result::OK) {
        Event subHalEvent = event;
        V1_0::Event subHalEvent = event;
        if (!isSubHalIndexValid(event.sensorHandle)) {
            return Result::BAD_VALUE;
        }
        subHalEvent.sensorHandle = clearSubHalIndex(event.sensorHandle);
        result = getSubHalForSensorHandle(event.sensorHandle)->injectSensorData(subHalEvent);
        result = getSubHalForSensorHandle(event.sensorHandle)
                         ->injectSensorData(convertToNewEvent(subHalEvent));
    }
    return result;
}

Return<void> HalProxy::registerDirectChannel(const SharedMemInfo& mem,
                                             registerDirectChannel_cb _hidl_cb) {
                                             ISensorsV2_0::registerDirectChannel_cb _hidl_cb) {
    if (mDirectChannelSubHal == nullptr) {
        _hidl_cb(Result::INVALID_OPERATION, -1 /* channelHandle */);
    } else {
@@ -257,7 +319,8 @@ Return<Result> HalProxy::unregisterDirectChannel(int32_t channelHandle) {
}

Return<void> HalProxy::configDirectReport(int32_t sensorHandle, int32_t channelHandle,
                                          RateLevel rate, configDirectReport_cb _hidl_cb) {
                                          RateLevel rate,
                                          ISensorsV2_0::configDirectReport_cb _hidl_cb) {
    if (mDirectChannelSubHal == nullptr) {
        _hidl_cb(Result::INVALID_OPERATION, -1 /* reportToken */);
    } else if (sensorHandle == -1 && rate != RateLevel::STOP) {
@@ -302,7 +365,7 @@ Return<void> HalProxy::debug(const hidl_handle& fd, const hidl_vec<hidl_string>&
    stream << "  # of non-dynamic sensors across all subhals: " << mSensors.size() << std::endl;
    stream << "  # of dynamic sensors across all subhals: " << mDynamicSensors.size() << std::endl;
    stream << "SubHals (" << mSubHalList.size() << "):" << std::endl;
    for (ISensorsSubHal* subHal : mSubHalList) {
    for (auto& subHal : mSubHalList) {
        stream << "  Name: " << subHal->getName() << std::endl;
        stream << "  Debug dump: " << std::endl;
        android::base::WriteStringToFd(stream.str(), writeFd);
@@ -369,57 +432,66 @@ void HalProxy::initializeSubHalListFromConfigFile(const char* configFileName) {
            } else {
                SensorsHalGetSubHalFunc* sensorsHalGetSubHalPtr =
                        (SensorsHalGetSubHalFunc*)dlsym(handle, "sensorsHalGetSubHal");
                if (sensorsHalGetSubHalPtr == nullptr) {
                    ALOGE("Failed to locate sensorsHalGetSubHal function for library: %s",
                          subHalLibraryFile.c_str());
                } else {
                if (sensorsHalGetSubHalPtr != nullptr) {
                    std::function<SensorsHalGetSubHalFunc> sensorsHalGetSubHal =
                            *sensorsHalGetSubHalPtr;
                    uint32_t version;
                    ISensorsSubHal* subHal = sensorsHalGetSubHal(&version);
                    ISensorsSubHalV2_0* subHal = sensorsHalGetSubHal(&version);
                    if (version != SUB_HAL_2_0_VERSION) {
                        ALOGE("SubHal version was not 2.0 for library: %s",
                              subHalLibraryFile.c_str());
                    } else {
                        ALOGV("Loaded SubHal from library: %s", subHalLibraryFile.c_str());
                        mSubHalList.push_back(subHal);
                        mSubHalList.push_back(std::make_unique<SubHalWrapperV2_0>(subHal));
                    }
                } else {
                    SensorsHalGetSubHalV2_1Func* getSubHalV2_1Ptr =
                            (SensorsHalGetSubHalV2_1Func*)dlsym(handle, "sensorsHalGetSubHal_2_1");

                    if (getSubHalV2_1Ptr == nullptr) {
                        ALOGE("Failed to locate sensorsHalGetSubHal function for library: %s",
                              subHalLibraryFile.c_str());
                    } else {
                        std::function<SensorsHalGetSubHalV2_1Func> sensorsHalGetSubHal_2_1 =
                                *getSubHalV2_1Ptr;
                        uint32_t version;
                        ISensorsSubHalV2_1* subHal = sensorsHalGetSubHal_2_1(&version);
                        if (version != SUB_HAL_2_1_VERSION) {
                            ALOGE("SubHal version was not 2.1 for library: %s",
                                  subHalLibraryFile.c_str());
                        } else {
                            ALOGV("Loaded SubHal from library: %s", subHalLibraryFile.c_str());
                            mSubHalList.push_back(std::make_unique<SubHalWrapperV2_1>(subHal));
                        }
                    }
                }
            }
        }

void HalProxy::initializeSubHalCallbacks() {
    for (size_t subHalIndex = 0; subHalIndex < mSubHalList.size(); subHalIndex++) {
        sp<IHalProxyCallback> callback = new HalProxyCallback(this, subHalIndex);
        mSubHalCallbacks.push_back(callback);
    }
}

void HalProxy::initializeSensorList() {
    for (size_t subHalIndex = 0; subHalIndex < mSubHalList.size(); subHalIndex++) {
        ISensorsSubHal* subHal = mSubHalList[subHalIndex];
        auto result = subHal->getSensorsList([&](const auto& list) {
        auto result = mSubHalList[subHalIndex]->getSensorsList([&](const auto& list) {
            for (SensorInfo sensor : list) {
                if (!subHalIndexIsClear(sensor.sensorHandle)) {
                    ALOGE("SubHal sensorHandle's first byte was not 0");
                } else {
                    ALOGV("Loaded sensor: %s", sensor.name.c_str());
                    sensor.sensorHandle = setSubHalIndex(sensor.sensorHandle, subHalIndex);
                    setDirectChannelFlags(&sensor, subHal);
                    setDirectChannelFlags(&sensor, mSubHalList[subHalIndex]);
                    mSensors[sensor.sensorHandle] = sensor;
                }
            }
        });
        if (!result.isOk()) {
            ALOGE("getSensorsList call failed for SubHal: %s", subHal->getName().c_str());
            ALOGE("getSensorsList call failed for SubHal: %s",
                  mSubHalList[subHalIndex]->getName().c_str());
        }
    }
}

void HalProxy::init() {
    initializeSubHalCallbacks();
    initializeSensorList();
}

@@ -552,7 +624,7 @@ void HalProxy::resetSharedWakelock() {
}

void HalProxy::postEventsToMessageQueue(const std::vector<Event>& events, size_t numWakeupEvents,
                                        ScopedWakelock wakelock) {
                                        V2_0::implementation::ScopedWakelock wakelock) {
    size_t numToWrite = 0;
    std::lock_guard<std::mutex> lock(mEventQueueWriteMutex);
    if (wakelock.isLocked()) {
@@ -610,7 +682,8 @@ void HalProxy::decrementRefCountAndMaybeReleaseWakelock(size_t delta,
    }
}

void HalProxy::setDirectChannelFlags(SensorInfo* sensorInfo, ISensorsSubHal* subHal) {
void HalProxy::setDirectChannelFlags(SensorInfo* sensorInfo,
                                     std::shared_ptr<ISubHalWrapperBase> subHal) {
    bool sensorSupportsDirectChannel =
            (sensorInfo->flags & (V1_0::SensorFlagBits::MASK_DIRECT_REPORT |
                                  V1_0::SensorFlagBits::MASK_DIRECT_CHANNEL)) != 0;
@@ -624,7 +697,7 @@ void HalProxy::setDirectChannelFlags(SensorInfo* sensorInfo, ISensorsSubHal* sub
    }
}

ISensorsSubHal* HalProxy::getSubHalForSensorHandle(int32_t sensorHandle) {
std::shared_ptr<ISubHalWrapperBase> HalProxy::getSubHalForSensorHandle(int32_t sensorHandle) {
    return mSubHalList[extractSubHalIndex(sensorHandle)];
}

@@ -651,46 +724,8 @@ bool HalProxy::subHalIndexIsClear(int32_t sensorHandle) {
    return (sensorHandle & kSensorHandleSubHalIndexMask) == 0;
}

void HalProxyCallback::postEvents(const std::vector<Event>& events, ScopedWakelock wakelock) {
    if (events.empty() || !mHalProxy->areThreadsRunning()) return;
    size_t numWakeupEvents;
    std::vector<Event> processedEvents = processEvents(events, &numWakeupEvents);
    if (numWakeupEvents > 0) {
        ALOG_ASSERT(wakelock.isLocked(),
                    "Wakeup events posted while wakelock unlocked for subhal"
                    " w/ index %" PRId32 ".",
                    mSubHalIndex);
    } else {
        ALOG_ASSERT(!wakelock.isLocked(),
                    "No Wakeup events posted but wakelock locked for subhal"
                    " w/ index %" PRId32 ".",
                    mSubHalIndex);
    }
    mHalProxy->postEventsToMessageQueue(processedEvents, numWakeupEvents, std::move(wakelock));
}

ScopedWakelock HalProxyCallback::createScopedWakelock(bool lock) {
    ScopedWakelock wakelock(mHalProxy, lock);
    return wakelock;
}

std::vector<Event> HalProxyCallback::processEvents(const std::vector<Event>& events,
                                                   size_t* numWakeupEvents) const {
    *numWakeupEvents = 0;
    std::vector<Event> eventsOut;
    for (Event event : events) {
        event.sensorHandle = setSubHalIndex(event.sensorHandle, mSubHalIndex);
        eventsOut.push_back(event);
        const SensorInfo& sensor = mHalProxy->getSensorInfo(event.sensorHandle);
        if ((sensor.flags & V1_0::SensorFlagBits::WAKE_UP) != 0) {
            (*numWakeupEvents)++;
        }
    }
    return eventsOut;
}

}  // namespace implementation
}  // namespace V2_0
}  // namespace V2_1
}  // namespace sensors
}  // namespace hardware
}  // namespace android
+84 −0
Original line number Diff line number Diff line
/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "HalProxyCallback.h"

#include <cinttypes>

namespace android {
namespace hardware {
namespace sensors {
namespace V2_0 {
namespace implementation {

static constexpr int32_t kBitsAfterSubHalIndex = 24;

/**
 * Set the subhal index as first byte of sensor handle and return this modified version.
 *
 * @param sensorHandle The sensor handle to modify.
 * @param subHalIndex The index in the hal proxy of the sub hal this sensor belongs to.
 *
 * @return The modified sensor handle.
 */
int32_t setSubHalIndex(int32_t sensorHandle, size_t subHalIndex) {
    return sensorHandle | (static_cast<int32_t>(subHalIndex) << kBitsAfterSubHalIndex);
}

void HalProxyCallbackBase::postEvents(const std::vector<V2_1::Event>& events,
                                      ScopedWakelock wakelock) {
    if (events.empty() || !mCallback->areThreadsRunning()) return;
    size_t numWakeupEvents;
    std::vector<V2_1::Event> processedEvents = processEvents(events, &numWakeupEvents);
    if (numWakeupEvents > 0) {
        ALOG_ASSERT(wakelock.isLocked(),
                    "Wakeup events posted while wakelock unlocked for subhal"
                    " w/ index %" PRId32 ".",
                    mSubHalIndex);
    } else {
        ALOG_ASSERT(!wakelock.isLocked(),
                    "No Wakeup events posted but wakelock locked for subhal"
                    " w/ index %" PRId32 ".",
                    mSubHalIndex);
    }
    mCallback->postEventsToMessageQueue(processedEvents, numWakeupEvents, std::move(wakelock));
}

ScopedWakelock HalProxyCallbackBase::createScopedWakelock(bool lock) {
    ScopedWakelock wakelock(mRefCounter, lock);
    return wakelock;
}

std::vector<V2_1::Event> HalProxyCallbackBase::processEvents(const std::vector<V2_1::Event>& events,
                                                             size_t* numWakeupEvents) const {
    *numWakeupEvents = 0;
    std::vector<V2_1::Event> eventsOut;
    for (V2_1::Event event : events) {
        event.sensorHandle = setSubHalIndex(event.sensorHandle, mSubHalIndex);
        eventsOut.push_back(event);
        const V2_1::SensorInfo& sensor = mCallback->getSensorInfo(event.sensorHandle);
        if ((sensor.flags & V1_0::SensorFlagBits::WAKE_UP) != 0) {
            (*numWakeupEvents)++;
        }
    }
    return eventsOut;
}

}  // namespace implementation
}  // namespace V2_0
}  // namespace sensors
}  // namespace hardware
}  // namespace android
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