I/O Multiplexing: select and poll
I/O Multiplexing: select and poll
I/O Multiplexing: select and poll
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<strong>poll</strong> 函 數 中 的 事 件 設 定<br />
•events 與 revents 由 下 列 bit flag 組 成<br />
Constant events revents Description<br />
POLLIN x x normal or priority b<strong>and</strong> to read<br />
POLLRDNORM x x normal data to read<br />
POLLRDBAND x x priority b<strong>and</strong> data to read<br />
POLLPRI x x high-priority data to read<br />
POLLOUT x x normal data can be written<br />
POLLWRNORM x x normal data can be written<br />
POLLWRBAND x x priority b<strong>and</strong> data can be written<br />
POLLERR x an error has occurred<br />
POLLHUP x hangup has occurred<br />
POLLNVAL x descriptor is not an open file<br />
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