95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
|
|
/*
|
|
* 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
|
|
|
|
/* Epoll event masks */
|
|
#define EPOLLIN (__force __poll_t)0x00000001
|
|
#define EPOLLPRI (__force __poll_t)0x00000002
|
|
#define EPOLLOUT (__force __poll_t)0x00000004
|
|
#define EPOLLERR (__force __poll_t)0x00000008
|
|
#define EPOLLHUP (__force __poll_t)0x00000010
|
|
#define EPOLLNVAL (__force __poll_t)0x00000020
|
|
#define EPOLLRDNORM (__force __poll_t)0x00000040
|
|
#define EPOLLRDBAND (__force __poll_t)0x00000080
|
|
#define EPOLLWRNORM (__force __poll_t)0x00000100
|
|
#define EPOLLWRBAND (__force __poll_t)0x00000200
|
|
#define EPOLLMSG (__force __poll_t)0x00000400
|
|
#define EPOLLRDHUP (__force __poll_t)0x00002000
|
|
|
|
/* Set exclusive wakeup mode for the target file descriptor */
|
|
#define EPOLLEXCLUSIVE (__force __poll_t)(1U << 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 (__force __poll_t)(1U << 29)
|
|
|
|
/* Set the One Shot behaviour for the target file descriptor */
|
|
#define EPOLLONESHOT (__force __poll_t)(1U << 30)
|
|
|
|
/* Set the Edge Triggered behaviour for the target file descriptor */
|
|
#define EPOLLET (__force __poll_t)(1U << 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 {
|
|
__poll_t events;
|
|
__u64 data;
|
|
} EPOLL_PACKED;
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
|
|
{
|
|
if ((epev->events & EPOLLWAKEUP) && !capable(CAP_BLOCK_SUSPEND))
|
|
epev->events &= ~EPOLLWAKEUP;
|
|
}
|
|
#else
|
|
static inline void ep_take_care_of_epollwakeup(struct epoll_event *epev)
|
|
{
|
|
epev->events &= ~EPOLLWAKEUP;
|
|
}
|
|
#endif
|
|
#endif /* _UAPI_LINUX_EVENTPOLL_H */
|