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 */