epoll_event(3type) - Linux manual page (original) (raw)

epollevent(3type) epollevent(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 _epollevent_ 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)](../man2/epoll%5Fwait.2.html), [epoll_ctl(2)](../man2/epoll%5Fctl.2.html)

COLOPHON top

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Linux man-pages 6.10 2024-05-02 epollevent(3type)

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