1/* 2 * include/linux/eventpoll.h ( Efficient event polling implementation ) 3 * Copyright (C) 2001,...,2006 Davide Libenzi 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * Davide Libenzi <davidel@xmailserver.org> 11 * 12 */ 13 14#ifndef _UAPI_LINUX_EVENTPOLL_H 15#define _UAPI_LINUX_EVENTPOLL_H 16 17/* For O_CLOEXEC */ 18#include <linux/fcntl.h> 19#include <linux/types.h> 20 21/* Flags for epoll_create1. */ 22#define EPOLL_CLOEXEC O_CLOEXEC 23 24/* Valid opcodes to issue to sys_epoll_ctl() */ 25#define EPOLL_CTL_ADD 1 26#define EPOLL_CTL_DEL 2 27#define EPOLL_CTL_MOD 3 28 29/* 30 * Request the handling of system wakeup events so as to prevent system suspends 31 * from happening while those events are being processed. 32 * 33 * Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be 34 * re-allowed until epoll_wait is called again after consuming the wakeup 35 * event(s). 36 * 37 * Requires CAP_BLOCK_SUSPEND 38 */ 39#define EPOLLWAKEUP (1 << 29) 40 41/* Set the One Shot behaviour for the target file descriptor */ 42#define EPOLLONESHOT (1 << 30) 43 44/* Set the Edge Triggered behaviour for the target file descriptor */ 45#define EPOLLET (1 << 31) 46 47/* 48 * On x86-64 make the 64bit structure have the same alignment as the 49 * 32bit structure. This makes 32bit emulation easier. 50 * 51 * UML/x86_64 needs the same packing as x86_64 52 */ 53#ifdef __x86_64__ 54#define EPOLL_PACKED __attribute__((packed)) 55#else 56#define EPOLL_PACKED 57#endif 58 59struct epoll_event { 60 __u32 events; 61 __u64 data; 62} EPOLL_PACKED; 63 64 65#endif /* _UAPI_LINUX_EVENTPOLL_H */ 66