| /* |
| * Copyright (C) 2010 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. |
| */ |
| |
| #ifndef ANDROID_SENSOR_SERVICE_H |
| #define ANDROID_SENSOR_SERVICE_H |
| |
| #include "SensorList.h" |
| #include "RecentEventLogger.h" |
| |
| #include <binder/BinderService.h> |
| #include <cutils/compiler.h> |
| #include <gui/ISensorServer.h> |
| #include <gui/ISensorEventConnection.h> |
| #include <gui/Sensor.h> |
| |
| #include <utils/AndroidThreads.h> |
| #include <utils/KeyedVector.h> |
| #include <utils/Looper.h> |
| #include <utils/SortedVector.h> |
| #include <utils/String8.h> |
| #include <utils/Vector.h> |
| #include <utils/threads.h> |
| |
| #include <stdint.h> |
| #include <sys/types.h> |
| #include <unordered_map> |
| #include <unordered_set> |
| |
| #if __clang__ |
| // Clang warns about SensorEventConnection::dump hiding BBinder::dump. The cause isn't fixable |
| // without changing the API, so let's tell clang this is indeed intentional. |
| #pragma clang diagnostic ignored "-Woverloaded-virtual" |
| #endif |
| |
| // --------------------------------------------------------------------------- |
| #define IGNORE_HARDWARE_FUSION false |
| #define DEBUG_CONNECTIONS false |
| // Max size is 100 KB which is enough to accept a batch of about 1000 events. |
| #define MAX_SOCKET_BUFFER_SIZE_BATCHED (100 * 1024) |
| // For older HALs which don't support batching, use a smaller socket buffer size. |
| #define SOCKET_BUFFER_SIZE_NON_BATCHED (4 * 1024) |
| |
| #define SENSOR_REGISTRATIONS_BUF_SIZE 20 |
| |
| namespace android { |
| // --------------------------------------------------------------------------- |
| class SensorInterface; |
| using namespace SensorServiceUtil; |
| |
| class SensorService : |
| public BinderService<SensorService>, |
| public BnSensorServer, |
| protected Thread |
| { |
| // nested class/struct for internal use |
| class SensorEventConnection; |
| |
| public: |
| void cleanupConnection(SensorEventConnection* connection); |
| |
| status_t enable(const sp<SensorEventConnection>& connection, int handle, |
| nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, int reservedFlags, |
| const String16& opPackageName); |
| |
| status_t disable(const sp<SensorEventConnection>& connection, int handle); |
| |
| status_t setEventRate(const sp<SensorEventConnection>& connection, int handle, nsecs_t ns, |
| const String16& opPackageName); |
| |
| status_t flushSensor(const sp<SensorEventConnection>& connection, |
| const String16& opPackageName); |
| |
| private: |
| friend class BinderService<SensorService>; |
| |
| // nested class/struct for internal use |
| class SensorRecord; |
| class SensorEventAckReceiver; |
| struct SensorRegistrationInfo; |
| |
| enum Mode { |
| // The regular operating mode where any application can register/unregister/call flush on |
| // sensors. |
| NORMAL = 0, |
| // This mode is only used for testing purposes. Not all HALs support this mode. In this mode, |
| // the HAL ignores the sensor data provided by physical sensors and accepts the data that is |
| // injected from the SensorService as if it were the real sensor data. This mode is primarily |
| // used for testing various algorithms like vendor provided SensorFusion, Step Counter and |
| // Step Detector etc. Typically in this mode, there will be a client (a |
| // SensorEventConnection) which will be injecting sensor data into the HAL. Normal apps can |
| // unregister and register for any sensor that supports injection. Registering to sensors |
| // that do not support injection will give an error. TODO(aakella) : Allow exactly one |
| // client to inject sensor data at a time. |
| DATA_INJECTION = 1, |
| // This mode is used only for testing sensors. Each sensor can be tested in isolation with |
| // the required sampling_rate and maxReportLatency parameters without having to think about |
| // the data rates requested by other applications. End user devices are always expected to be |
| // in NORMAL mode. When this mode is first activated, all active sensors from all connections |
| // are disabled. Calling flush() will return an error. In this mode, only the requests from |
| // selected apps whose package names are whitelisted are allowed (typically CTS apps). Only |
| // these apps can register/unregister/call flush() on sensors. If SensorService switches to |
| // NORMAL mode again, all sensors that were previously registered to are activated with the |
| // corresponding paramaters if the application hasn't unregistered for sensors in the mean |
| // time. NOTE: Non whitelisted app whose sensors were previously deactivated may still |
| // receive events if a whitelisted app requests data from the same sensor. |
| RESTRICTED = 2 |
| |
| // State Transitions supported. |
| // RESTRICTED <--- NORMAL ---> DATA_INJECTION |
| // ---> <--- |
| |
| // Shell commands to switch modes in SensorService. |
| // 1) Put SensorService in RESTRICTED mode with packageName .cts. If it is already in |
| // restricted mode it is treated as a NO_OP (and packageName is NOT changed). |
| // |
| // $ adb shell dumpsys sensorservice restrict .cts. |
| // |
| // 2) Put SensorService in DATA_INJECTION mode with packageName .xts. If it is already in |
| // data_injection mode it is treated as a NO_OP (and packageName is NOT changed). |
| // |
| // $ adb shell dumpsys sensorservice data_injection .xts. |
| // |
| // 3) Reset sensorservice back to NORMAL mode. |
| // $ adb shell dumpsys sensorservice enable |
| }; |
| |
| static const char* WAKE_LOCK_NAME; |
| static char const* getServiceName() ANDROID_API { return "sensorservice"; } |
| SensorService() ANDROID_API; |
| virtual ~SensorService(); |
| |
| virtual void onFirstRef(); |
| |
| // Thread interface |
| virtual bool threadLoop(); |
| |
| // ISensorServer interface |
| virtual Vector<Sensor> getSensorList(const String16& opPackageName); |
| virtual Vector<Sensor> getDynamicSensorList(const String16& opPackageName); |
| virtual sp<ISensorEventConnection> createSensorEventConnection( |
| const String8& packageName, |
| int requestedMode, const String16& opPackageName); |
| virtual int isDataInjectionEnabled(); |
| virtual status_t dump(int fd, const Vector<String16>& args); |
| |
| String8 getSensorName(int handle) const; |
| bool isVirtualSensor(int handle) const; |
| sp<SensorInterface> getSensorInterfaceFromHandle(int handle) const; |
| bool isWakeUpSensor(int type) const; |
| void recordLastValueLocked(sensors_event_t const* buffer, size_t count); |
| static void sortEventBuffer(sensors_event_t* buffer, size_t count); |
| const Sensor& registerSensor(SensorInterface* sensor, |
| bool isDebug = false, bool isVirtual = false); |
| const Sensor& registerVirtualSensor(SensorInterface* sensor, bool isDebug = false); |
| const Sensor& registerDynamicSensorLocked(SensorInterface* sensor, bool isDebug = false); |
| bool unregisterDynamicSensorLocked(int handle); |
| status_t cleanupWithoutDisable(const sp<SensorEventConnection>& connection, int handle); |
| status_t cleanupWithoutDisableLocked(const sp<SensorEventConnection>& connection, int handle); |
| void cleanupAutoDisabledSensorLocked(const sp<SensorEventConnection>& connection, |
| sensors_event_t const* buffer, const int count); |
| static bool canAccessSensor(const Sensor& sensor, const char* operation, |
| const String16& opPackageName); |
| // SensorService acquires a partial wakelock for delivering events from wake up sensors. This |
| // method checks whether all the events from these wake up sensors have been delivered to the |
| // corresponding applications, if yes the wakelock is released. |
| void checkWakeLockState(); |
| void checkWakeLockStateLocked(); |
| bool isWakeLockAcquired(); |
| bool isWakeUpSensorEvent(const sensors_event_t& event) const; |
| |
| sp<Looper> getLooper() const; |
| |
| // Reset mWakeLockRefCounts for all SensorEventConnections to zero. This may happen if |
| // SensorService did not receive any acknowledgements from apps which have registered for |
| // wake_up sensors. |
| void resetAllWakeLockRefCounts(); |
| |
| // Acquire or release wake_lock. If wake_lock is acquired, set the timeout in the looper to 5 |
| // seconds and wake the looper. |
| void setWakeLockAcquiredLocked(bool acquire); |
| |
| // Send events from the event cache for this particular connection. |
| void sendEventsFromCache(const sp<SensorEventConnection>& connection); |
| |
| // Promote all weak referecences in mActiveConnections vector to strong references and add them |
| // to the output vector. |
| void populateActiveConnections( SortedVector< sp<SensorEventConnection> >* activeConnections); |
| |
| // If SensorService is operating in RESTRICTED mode, only select whitelisted packages are |
| // allowed to register for or call flush on sensors. Typically only cts test packages are |
| // allowed. |
| bool isWhiteListedPackage(const String8& packageName); |
| |
| // Reset the state of SensorService to NORMAL mode. |
| status_t resetToNormalMode(); |
| status_t resetToNormalModeLocked(); |
| |
| // Transforms the UUIDs for all the sensors into proper IDs. |
| void makeUuidsIntoIdsForSensorList(Vector<Sensor> &sensorList) const; |
| // Gets the appropriate ID from the given UUID. |
| int32_t getIdFromUuid(const Sensor::uuid_t &uuid) const; |
| // Either read from storage or create a new one. |
| static bool initializeHmacKey(); |
| |
| |
| static uint8_t sHmacGlobalKey[128]; |
| static bool sHmacGlobalKeyIsValid; |
| |
| SensorList mSensors; |
| status_t mInitCheck; |
| |
| // Socket buffersize used to initialize BitTube. This size depends on whether batching is |
| // supported or not. |
| uint32_t mSocketBufferSize; |
| sp<Looper> mLooper; |
| sp<SensorEventAckReceiver> mAckReceiver; |
| |
| // protected by mLock |
| mutable Mutex mLock; |
| DefaultKeyedVector<int, SensorRecord*> mActiveSensors; |
| std::unordered_set<int> mActiveVirtualSensors; |
| SortedVector< wp<SensorEventConnection> > mActiveConnections; |
| bool mWakeLockAcquired; |
| sensors_event_t *mSensorEventBuffer, *mSensorEventScratch; |
| SensorEventConnection const **mMapFlushEventsToConnections; |
| std::unordered_map<int, RecentEventLogger*> mRecentEvent; |
| Mode mCurrentOperatingMode; |
| |
| // This packagaName is set when SensorService is in RESTRICTED or DATA_INJECTION mode. Only |
| // applications with this packageName are allowed to activate/deactivate or call flush on |
| // sensors. To run CTS this is can be set to ".cts." and only CTS tests will get access to |
| // sensors. |
| String8 mWhiteListedPackage; |
| |
| int mNextSensorRegIndex; |
| Vector<SensorRegistrationInfo> mLastNSensorRegistrations; |
| }; |
| |
| } // namespace android |
| #endif // ANDROID_SENSOR_SERVICE_H |