摘要：
Before describingselectandpoll, we need to step back and look at the bigger picture, examining the basic differences in the five I/O models that are available to us under Unix:blocking I/Ononblocking I/OI/O multiplexing (selectandpoll)signal driven I/O (SIGIO)asynchronous I/O (the POSIXaio_functions 阅读全文