1/* Copyright (C) 2008 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, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19#ifndef _SYS_TIMERFD_H 20#define _SYS_TIMERFD_H 1 21 22#include <time.h> 23 24 25/* Bits to be set in the FLAGS parameter of `timerfd_create'. */ 26enum 27 { 28 TFD_CLOEXEC = 02000000, 29#define TFD_CLOEXEC TFD_CLOEXEC 30 TFD_NONBLOCK = 04000 31#define TFD_NONBLOCK TFD_NONBLOCK 32 }; 33 34 35/* Bits to be set in the FLAGS parameter of `timerfd_settime'. */ 36enum 37 { 38 TFD_TIMER_ABSTIME = 1 << 0 39#define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME 40 }; 41 42 43__BEGIN_DECLS 44 45/* Return file descriptor for new interval timer source. */ 46extern int timerfd_create (clockid_t __clock_id, int __flags) __THROW; 47 48/* Set next expiration time of interval timer source UFD to UTMR. If 49 FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is 50 absolute. Optionally return the old expiration time in OTMR. */ 51extern int timerfd_settime (int __ufd, int __flags, 52 __const struct itimerspec *__utmr, 53 struct itimerspec *__otmr) __THROW; 54 55/* Return the next expiration time of UFD. */ 56extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW; 57 58__END_DECLS 59 60#endif /* sys/timerfd.h */ 61