LXR linux/include/linux/timerfd.h

   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/* For _IO helpers */
  15#include <linux/ioctl.h>
  16
  17/*
  18 * CAREFUL: Check include/asm-generic/fcntl.h when defining
  19 * new flags, since they might collide with O_* ones. We want
  20 * to re-use O_* flags that couldn't possibly have a meaning
  21 * from eventfd, in order to leave a free define-space for
  22 * shared O_* flags.
  23 */
  24#define TFD_TIMER_ABSTIME (1 << 0)
  25#define TFD_TIMER_CANCEL_ON_SET (1 << 1)
  26#define TFD_CLOEXEC O_CLOEXEC
  27#define TFD_NONBLOCK O_NONBLOCK
  28
  29#define TFD_SHARED_FCNTL_FLAGS (TFD_CLOEXEC | TFD_NONBLOCK)
  30/* Flags for timerfd_create.  */
  31#define TFD_CREATE_FLAGS TFD_SHARED_FCNTL_FLAGS
  32/* Flags for timerfd_settime.  */
  33#define TFD_SETTIME_FLAGS (TFD_TIMER_ABSTIME | TFD_TIMER_CANCEL_ON_SET)
  34
  35#define TFD_IOC_SET_TICKS       _IOW('T', 0, u64)
  36
  37#endif /* _LINUX_TIMERFD_H */
  38