| .\" Copyright (c) 2022 by Alejandro Colomar <alx@kernel.org> |
| .\" |
| .\" SPDX-License-Identifier: Linux-man-pages-copyleft |
| .\" |
| .\" |
| .TH epoll_event 3type (date) "Linux man-pages (unreleased)" |
| .SH NAME |
| epoll_event, epoll_data, epoll_data_t |
| \- epoll event |
| .SH LIBRARY |
| Standard C library |
| .RI ( libc ) |
| .SH SYNOPSIS |
| .EX |
| .B #include <sys/epoll.h> |
| .P |
| .B struct epoll_event { |
| .BR " uint32_t events;" " /* Epoll events */" |
| .BR " epoll_data_t data;" " /* User data variable */" |
| .B }; |
| .P |
| .B union epoll_data { |
| .B " void *ptr;" |
| .B " int fd;" |
| .B " uint32_t u32;" |
| .B " uint64_t u64;" |
| .B }; |
| .P |
| .B "typedef union epoll_data epoll_data_t;" |
| .EE |
| .SH DESCRIPTION |
| The |
| .I epoll_event |
| structure specifies data that the kernel should save and |
| return when the corresponding file descriptor becomes ready. |
| .SH VERSIONS |
| .SS C library/kernel differences |
| The Linux kernel headers also provide this type, |
| with a slightly different definition: |
| .P |
| .in +4n |
| .EX |
| #include <linux/eventpoll.h> |
| \& |
| struct epoll_event { |
| __poll_t events; |
| __u64 data; |
| }; |
| .EE |
| .in |
| .SH STANDARDS |
| Linux. |
| .SH SEE ALSO |
| .BR epoll_wait (2), |
| .BR epoll_ctl (2) |
