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 <[email protected]> 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 #define EPOLL_CTL_DISABLE 4 29 30 /* 31 * Request the handling of system wakeup events so as to prevent system suspends 32 * from happening while those events are being processed. 33 * 34 * Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be 35 * re-allowed until epoll_wait is called again after consuming the wakeup 36 * event(s). 37 * 38 * Requires CAP_BLOCK_SUSPEND 39 */ 40 #define EPOLLWAKEUP (1 << 29) 41 42 /* Set the One Shot behaviour for the target file descriptor */ 43 #define EPOLLONESHOT (1 << 30) 44 45 /* Set the Edge Triggered behaviour for the target file descriptor */ 46 #define EPOLLET (1 << 31) 47 48 /* 49 * On x86-64 make the 64bit structure have the same alignment as the 50 * 32bit structure. This makes 32bit emulation easier. 51 * 52 * UML/x86_64 needs the same packing as x86_64 53 */ 54 #ifdef __x86_64__ 55 #define EPOLL_PACKED __attribute__((packed)) 56 #else 57 #define EPOLL_PACKED 58 #endif 59 60 struct epoll_event { 61 __u32 events; 62 __u64 data; 63 } EPOLL_PACKED; 64 65 66 #endif /* _UAPI_LINUX_EVENTPOLL_H */ 67