/* *  include/linux/eventpoll.h ( Efficient event polling implementation ) *  Copyright (C) 2001,...,2006	 Davide Libenzi * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  Davide Libenzi <davidel@xmailserver.org> * */ #ifndef _UAPI_LINUX_EVENTPOLL_H#define _UAPI_LINUX_EVENTPOLL_H /* For O_CLOEXEC */#include <linux/fcntl.h>#include <linux/types.h> /* Flags for epoll_create1.  */#define EPOLL_CLOEXEC O_CLOEXEC /* Valid opcodes to issue to sys_epoll_ctl() */#define EPOLL_CTL_ADD 1#define EPOLL_CTL_DEL 2#define EPOLL_CTL_MOD 3 /* Set exclusive wakeup mode for the target file descriptor */#define EPOLLEXCLUSIVE (1 << 28) /* * Request the handling of system wakeup events so as to prevent system suspends * from happening while those events are being processed. * * Assuming neither EPOLLET nor EPOLLONESHOT is set, system suspends will not be * re-allowed until epoll_wait is called again after consuming the wakeup * event(s). * * Requires CAP_BLOCK_SUSPEND */#define EPOLLWAKEUP (1 << 29) /* Set the One Shot behaviour for the target file descriptor */#define EPOLLONESHOT (1 << 30) /* Set the Edge Triggered behaviour for the target file descriptor */#define EPOLLET (1 << 31) /*  * On x86-64 make the 64bit structure have the same alignment as the * 32bit structure. This makes 32bit emulation easier. * * UML/x86_64 needs the same packing as x86_64 */#ifdef __x86_64__#define EPOLL_PACKED __attribute__((packed))#else#define EPOLL_PACKED#endif struct epoll_event {	__u32 events;	__u64 data;} EPOLL_PACKED; #ifdef CONFIG_PM_SLEEPstatic inline void ep_take_care_of_epollwakeup(struct epoll_event *epev){	if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND))		epev->events &= ~EPOLLWAKEUP;}#elsestatic inline void ep_take_care_of_epollwakeup(struct epoll_event *epev){	epev->events &= ~EPOLLWAKEUP;}#endif#endif /* _UAPI_LINUX_EVENTPOLL_H */