linux/include/linux/timerfd.h
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   1/*
   2 *  include/linux/timerfd.h
   3 *
   4 *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
   5 *
   6 */
   7
   8#ifndef _LINUX_TIMERFD_H
   9#define _LINUX_TIMERFD_H
  10
  11/* For O_CLOEXEC and O_NONBLOCK */
  12#include <linux/fcntl.h>
  13
  14/*
  15 * CAREFUL: Check include/asm-generic/fcntl.h when defining
  16 * new flags, since they might collide with O_* ones. We want
  17 * to re-use O_* flags that couldn't possibly have a meaning
  18 * from eventfd, in order to leave a free define-space for
  19 * shared O_* flags.
  20 */
  21#define TFD_TIMER_ABSTIME (1 << 0)
  22#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
  23#define TFD_CLOEXEC O_CLOEXEC
  24#define TFD_NONBLOCK O_NONBLOCK
  25
  26#define TFD_SHARED_FCNTL_FLAGS (TFD_CLOEXEC | TFD_NONBLOCK)
  27/* Flags for timerfd_create.  */
  28#define TFD_CREATE_FLAGS TFD_SHARED_FCNTL_FLAGS
  29/* Flags for timerfd_settime.  */
  30#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)
  31
  32#endif /* _LINUX_TIMERFD_H */
  33
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