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 be‐
       comes ready.

STANDARDS
       This type is Linux-specific.

NOTES
   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;
           };

SEE ALSO
       epoll_wait(2), epoll_ctl(7)

Linux man-pages 6.03                                         2022-10-30                                          epoll_event(3type)