Method GetChunk

be/src/kudu/util/debug/trace_event_impl.cc:304–315

  }

  virtual unique_ptr<TraceBufferChunk> GetChunk(size_t* index) OVERRIDE {
    // This function may be called when adding normal events or indirectly from
    // AddMetadataEventsWhileLocked(). We can not DECHECK(!IsFull()) because we
    // have to add the metadata events and flush thread-local buffers even if
    // the buffer is full.
    *index = chunks_.size();
    chunks_.push_back(nullptr);  // Put NULL in the slot of a in-flight chunk.
    ++in_flight_chunk_count_;
    // + 1 because zero chunk_seq is not allowed.
    return unique_ptr<TraceBufferChunk>(
        new TraceBufferChunk(static_cast<uint32_t>(*index) + 1));
  }

  virtual void ReturnChunk(size_t index,
                           unique_ptr<TraceBufferChunk> chunk) OVERRIDE {