sysdeps/unix/sysv/linux/sys/timerfd.h

   1 /* Copyright (C) 2008-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_TIMERFD_H
  19 #define _SYS_TIMERFD_H  1
  20
  21 #include <time.h>
  22
  23 /* Get the platform-dependent flags.  */
  24 #include <bits/timerfd.h>
  25
  26
  27 /* Bits to be set in the FLAGS parameter of `timerfd_settime'.  */
  28 enum
  29   {
  30     TFD_TIMER_ABSTIME = 1 << 0
  31 #define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME
  32   };
  33
  34
  35 __BEGIN_DECLS
  36
  37 /* Return file descriptor for new interval timer source.  */
  38 extern int timerfd_create (clockid_t __clock_id, int __flags) __THROW;
  39
  40 /* Set next expiration time of interval timer source UFD to UTMR.  If
  41    FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is
  42    absolute.  Optionally return the old expiration time in OTMR.  */
  43 extern int timerfd_settime (int __ufd, int __flags,
  44                             const struct itimerspec *__utmr,
  45                             struct itimerspec *__otmr) __THROW;
  46
  47 /* Return the next expiration time of UFD.  */
  48 extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW;
  49
  50 __END_DECLS
  51
  52 #endif /* sys/timerfd.h */