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       1  /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
       2  /*
       3   *  include/linux/timerfd.h
       4   *
       5   *  Copyright (C) 2007  Davide Libenzi <davidel@xmailserver.org>
       6   *
       7   */
       8  
       9  #ifndef _LINUX_TIMERFD_H
      10  #define _LINUX_TIMERFD_H
      11  
      12  #include <linux/types.h>
      13  
      14  /* For O_CLOEXEC and O_NONBLOCK */
      15  #include <linux/fcntl.h>
      16  
      17  /* For _IO helpers */
      18  #include <linux/ioctl.h>
      19  
      20  /*
      21   * CAREFUL: Check include/asm-generic/fcntl.h when defining
      22   * new flags, since they might collide with O_* ones. We want
      23   * to re-use O_* flags that couldn't possibly have a meaning
      24   * from eventfd, in order to leave a free define-space for
      25   * shared O_* flags.
      26   *
      27   * Also make sure to update the masks in include/linux/timerfd.h
      28   * when adding new flags.
      29   */
      30  #define TFD_TIMER_ABSTIME (1 << 0)
      31  #define TFD_TIMER_CANCEL_ON_SET (1 << 1)
      32  #define TFD_CLOEXEC O_CLOEXEC
      33  #define TFD_NONBLOCK O_NONBLOCK
      34  
      35  #define TFD_IOC_SET_TICKS	_IOW('T', 0, __u64)
      36  
      37  #endif /* _LINUX_TIMERFD_H */