에프에이리눅스 / 1611_0007_prime_oven

Blame view

kernel/linux-imx6_3.14.28/include/uapi/linux/eventpoll.h 1.99 KB
edit raw normal view history
6b13f685e   김민수   BSP 최초 추가 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
  /*
   *  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
  
  /*
   * 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_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 */