epoll_event(3type) — Linux manual page

epoll_event(3type)                                    epoll_event(3type)

NAME

       epoll_event, epoll_data, epoll_data_t - epoll event

LIBRARY

       Standard C library (libc)

SYNOPSIS

       #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

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

VERSIONS

   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

       Linux.

SEE ALSO

       epoll_wait(2), epoll_ctl(2)

COLOPHON

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

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

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