void TransactionCompletedListener::setReleaseBufferCallback(const ReleaseCallbackId& callbackId,
                                                            ReleaseBufferCallback listener) {
    std::scoped_lock<std::mutex> lock(mMutex);
    mReleaseBufferCallbacks[callbackId] = listener;
}

• 申请锁，加入 mReleaseBufferCallbacks。