Merge "Document AudioFlinger::nextUniqueId()"

uint32_t AudioFlinger::nextUniqueId()

{

    return android_atomic_inc(&mNextUniqueId);

    return (uint32_t) android_atomic_inc(&mNextUniqueId);

}

AudioFlinger::PlaybackThread *AudioFlinger::primaryPlaybackThread_l() const

                                { return mStreamTypes[stream].volume; }

              void audioConfigChanged_l(int event, audio_io_handle_t ioHandle, const void *param2);

              // allocate an audio_io_handle_t, session ID, or effect ID

              // Allocate an audio_io_handle_t, session ID, effect ID, or audio_module_handle_t.

              // They all share the same ID space, but the namespaces are actually independent

              // because there are separate KeyedVectors for each kind of ID.

              // The return value is uint32_t, but is cast to signed for some IDs.

              // FIXME This API does not handle rollover to zero (for unsigned IDs),

              //       or from positive to negative (for signed IDs).

              //       Thus it may fail by returning an ID of the wrong sign,

              //       or by returning a non-unique ID.

              uint32_t nextUniqueId();

              status_t moveEffectChain_l(int sessionId,

                DefaultKeyedVector< audio_io_handle_t, sp<RecordThread> >    mRecordThreads;

                DefaultKeyedVector< pid_t, sp<NotificationClient> >    mNotificationClients;

                volatile int32_t                    mNextUniqueId;  // updated by android_atomic_inc

                // nextUniqueId() returns uint32_t, but this is declared int32_t

                // because the atomic operations require an int32_t

                audio_mode_t                        mMode;

                bool                                mBtNrecIsOff;