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 /*
  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 */