1EPOLLIN 0x00000001 2EPOLLPRI 0x00000002 3EPOLLOUT 0x00000004 4EPOLLERR 0x00000008 5EPOLLHUP 0x00000010 6EPOLLNVAL 0x00000020 7EPOLLRDNORM 0x00000040 8EPOLLRDBAND 0x00000080 9EPOLLWRNORM 0x00000100 10EPOLLWRBAND 0x00000200 11EPOLLMSG 0x00000400 12EPOLLRDHUP 0x00002000 13EPOLLEXCLUSIVE 0x10000000 14EPOLLWAKEUP 0x20000000 15EPOLLONESHOT 0x40000000 16EPOLLET 0x80000000 17