am 9d53e30e: Merge "Workaround for slow AudioRecord destructor" into klp-dev

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

// This class is used to destroy a RefBase asynchronously

class AsyncDestructThread : public Thread

{

public:

    AsyncDestructThread(sp<RefBase> refBase) : mRefBase(refBase) { }

protected:

    virtual ~AsyncDestructThread() { }

private:

    virtual bool        threadLoop()    { return false; }

    const   sp<RefBase> mRefBase;

};

#define CALLBACK_COND_WAIT_TIMEOUT_MS 1000

static void android_media_AudioRecord_release(JNIEnv *env,  jobject thiz) {

    sp<AudioRecord> lpRecorder = setAudioRecord(env, thiz, 0);

        env->DeleteGlobalRef(lpCookie->audioRecord_ref);

        delete lpCookie;

    }

    // FIXME AudioRecord destruction should not be slow

    if (lpRecorder != 0) {

        // must be a raw reference to avoid a race after run()

        AsyncDestructThread *adt = new AsyncDestructThread(lpRecorder);

        // guaranteed to not run destructor

        lpRecorder.clear();

        // after the run(), adt thread will hold a strong reference to lpRecorder,

        // and the only strong reference to itself

        adt->run("AsyncDestruct");

        // do not delete adt here: adt thread destroys itself, and lpRecorder if needed

    }

}