为什么 netty LocalChannel 在 readInbound 中重置 RecvByteBufAllocator.Handle

Question

    private void readInbound() {
        RecvByteBufAllocator.Handle handle = unsafe().recvBufAllocHandle();
        handle.reset(config());
        ChannelPipeline pipeline = pipeline();
        do {
            Object received = inboundBuffer.poll();
            if (received == null) {
                break;
            }
            pipeline.fireChannelRead(received);
        } while (handle.continueReading());

        pipeline.fireChannelReadComplete();
    }

handle.reset(config())将设置 totalBytesRead=0，然后handle.continueReading()将始终为 false。 所以这个 do while 块是没用的。