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. STANDARDS This type is Linux-specific. NOTES C library/kernel differences The Linux kernel headers also provide this type, with a slightly dif- ferent 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)
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