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yandaomin avatar yandaomin commented on August 29, 2024

shutdown可以指定在某个方向上终止连接，通过指定标志：SHUT_RD, SHUT_WR, SHUT_RDWR。比如指定SHUT_WR后可以继续读数据，但不能写入了。而close是两个方向上终止连接。
close会将描述符的引用计数减一，如果引用计数变为0就关闭描述符，发送FIN。而shutdown不管引用计数，直接发送FIN终止连接。所以在多线程下操作同一个socket描述符下，一个线程调用shutdown会使其他线程无法使用这个描述符，而调用close就不会影响到其他线程。

from uv-cpp.

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