epoll_event(3type) — Linux manual page

epoll_event(3type)                                    epoll_event(3type)

NAME         top

       epoll_event, epoll_data, epoll_data_t - epoll event

LIBRARY         top

       Standard C library (libc)

SYNOPSIS         top

       #include <sys/epoll.h>

       struct epoll_event {
           uint32_t      events;  /* Epoll events */
           epoll_data_t  data;    /* User data variable */
       };

       union epoll_data {
           void     *ptr;
           int       fd;
           uint32_t  u32;
           uint64_t  u64;
       };

       typedef union epoll_data  epoll_data_t;

DESCRIPTION         top

       The epoll_event structure specifies data that the kernel should
       save and return when the corresponding file descriptor becomes
       ready.

VERSIONS         top

   C library/kernel differences
       The Linux kernel headers also provide this type, with a slightly
       different definition:

           #include <linux/eventpoll.h>

           struct epoll_event {
               __poll_t  events;
               __u64     data;
           };

STANDARDS         top

       Linux.

SEE ALSO         top

       epoll_wait(2), epoll_ctl(2)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02             epoll_event(3type)

Pages that refer to this page: epoll_ctl(2),  epoll_wait(2)

HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.