write异步与流量控制 4.0.29.Final (二)addMessage与ChannelOutboundBuffer(yet)
cas
private void incrementPendingOutboundBytes(long size, boolean invokeLater) { if (size != 0L) { long newWriteBufferSize = TOTAL_PENDING_SIZE_UPDATER.addAndGet(this, size); if (newWriteBufferSize >= (long)this.channel.config().getWriteBufferHighWaterMark()) { this.setUnwritable(invokeLater); } } }