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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)

2024-05-02 Linux man-pages (unreleased)