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Commit 9a844cf7 authored by Aravind Akella's avatar Aravind Akella
Browse files

Enable wakeup sensors. 

SensorService should hold a wakelock till the app reads events from a wakeup sensor. Currently drivers hold a wakelock with a
timeout while delivering events from a wake up sensor like Significant Motion. This hack can be removed now.

Bug: 9774884
Change-Id: If3b5acb99c9cf0cd29012fcfa9d6b04c74133d01
parent 4cbf3c53

include/android/sensor.h

+3 −1
Original line number Diff line number Diff line
@@ -157,7 +157,9 @@ typedef struct ASensorEvent { 
            uint64_t        step_counter;

        } u64;

    };

    int32_t reserved1[4];



    uint32_t flags;

    int32_t reserved1[3];

} ASensorEvent;



struct ASensorManager;

include/gui/ISensorEventConnection.h

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ public: 
                                   nsecs_t maxBatchReportLatencyNs, int reservedFlags) = 0;

    virtual status_t setEventRate(int handle, nsecs_t ns) = 0;

    virtual status_t flush() = 0;

    virtual void decreaseWakeLockRefCount() = 0;

};



// ----------------------------------------------------------------------------

include/gui/Sensor.h

+3 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ public: 
    int32_t getFifoMaxEventCount() const;

    const String8& getStringType() const;

    const String8& getRequiredPermission() const;

    bool isWakeUpSensor() const;



    // LightFlattenable protocol

    inline bool isFixedSize() const { return false; }
@@ -93,6 +94,8 @@ private: 
    int32_t mFifoMaxEventCount;

    String8 mStringType;

    String8 mRequiredPermission;

    // Todo: Surface this in java SDK.

    bool    mWakeUpSensor;

    static void flattenString8(void*& buffer, size_t& size, const String8& string8);

    static bool unflattenString8(void const*& buffer, size_t& size, String8& outputString8);

};

include/gui/SensorEventQueue.h

+3 −2
Original line number Diff line number Diff line
@@ -27,7 +27,7 @@ 
#include <gui/BitTube.h>



// ----------------------------------------------------------------------------



#define WAKE_UP_SENSOR_EVENT_NEEDS_ACK (1 << 31)

struct ALooper;

struct ASensorEvent;
@@ -75,7 +75,8 @@ public: 
                          int reservedFlags) const;

    status_t disableSensor(int32_t handle) const;

    status_t flush() const;



    // Send an ack for every wake_up sensor event that is set to WAKE_UP_SENSOR_EVENT_NEEDS_ACK.

    void sendAck(const ASensorEvent* events, int count);

private:

    sp<Looper> getLooper() const;

    sp<ISensorEventConnection> mSensorEventConnection;

libs/gui/ISensorEventConnection.cpp

+14 −1
Original line number Diff line number Diff line
@@ -34,7 +34,8 @@ enum { 
    GET_SENSOR_CHANNEL = IBinder::FIRST_CALL_TRANSACTION,

    ENABLE_DISABLE,

    SET_EVENT_RATE,

    FLUSH_SENSOR

    FLUSH_SENSOR,

    DECREASE_WAKE_LOCK_REFCOUNT

};



class BpSensorEventConnection : public BpInterface<ISensorEventConnection>
@@ -83,6 +84,13 @@ public: 
        remote()->transact(FLUSH_SENSOR, data, &reply);

        return reply.readInt32();

    }



    virtual void decreaseWakeLockRefCount() {

        Parcel data, reply;

        data.writeInterfaceToken(ISensorEventConnection::getInterfaceDescriptor());

        remote()->transact(DECREASE_WAKE_LOCK_REFCOUNT, data, &reply, IBinder::FLAG_ONEWAY);

        return;

    }

};



IMPLEMENT_META_INTERFACE(SensorEventConnection, "android.gui.SensorEventConnection");
@@ -125,6 +133,11 @@ status_t BnSensorEventConnection::onTransact( 
            reply->writeInt32(result);

            return NO_ERROR;

        } break;

        case DECREASE_WAKE_LOCK_REFCOUNT: {

            CHECK_INTERFACE(ISensorEventConnection, data, reply);

            decreaseWakeLockRefCount();

            return NO_ERROR;

        } break;

    }

    return BBinder::onTransact(code, data, reply, flags);

}