epoll_event(3type)

NAME

epoll_event, epoll_data, epoll_data_t - epoll event

LIBRARY

Standard C library (libc)

#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;

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

This type is Linux-specific.

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;};