Linux Kernel  3.7.1
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eventpoll.h
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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 
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 
59 struct epoll_event {
62 } EPOLL_PACKED;
63 
64 
65 #endif /* _UAPI_LINUX_EVENTPOLL_H */