/*
 *  include/linux/eventpoll.h ( Efficent 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 _LINUX_EVENTPOLL_H
#define _LINUX_EVENTPOLL_H

#include <linux/types.h>


/* Valid opcodes to issue to sys_epoll_ctl() */
#define EPOLL_CTL_ADD 1
#define EPOLL_CTL_DEL 2
#define EPOLL_CTL_MOD 3

/* 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 - UML + UML_X86 +
 * 64_BIT adds up to UML/x86_64.
 */
#ifdef __x86_64__
#define EPOLL_PACKED __attribute__((packed))
#else
#if defined(CONFIG_UML) && defined(CONFIG_UML_X86) && defined(CONFIG_64BIT)
#define EPOLL_PACKED __attribute__((packed))
#else
#define EPOLL_PACKED
#endif
#endif

struct epoll_event {
	__u32 events;
	__u64 data;
} EPOLL_PACKED;


#endif /* #ifndef _LINUX_EVENTPOLL_H */

