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timerfd.h
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/* Copyright (C) 2008-2021 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ #ifndef _SYS_TIMERFD_H #define _SYS_TIMERFD_H 1 #include <time.h> #include <bits/types/struct_itimerspec.h> /* Get the platform-dependent flags. */ #include <bits/timerfd.h> /* Bits to be set in the FLAGS parameter of `timerfd_settime'. */ enum { TFD_TIMER_ABSTIME = 1 << 0, #define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME TFD_TIMER_CANCEL_ON_SET = 1 << 1 #define TFD_TIMER_CANCEL_ON_SET TFD_TIMER_CANCEL_ON_SET }; __BEGIN_DECLS /* Return file descriptor for new interval timer source. */ extern int timerfd_create (__clockid_t __clock_id, int __flags) __THROW; /* Set next expiration time of interval timer source UFD to UTMR. If FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is absolute. Optionally return the old expiration time in OTMR. */ extern int timerfd_settime (int __ufd, int __flags, const struct itimerspec *__utmr, struct itimerspec *__otmr) __THROW; #ifdef __USE_TIME_BITS64 # if defined(__REDIRECT_NTH) extern int __REDIRECT_NTH (timerfd_settime, (int __ufd, int __flags, const struct itimerspec *__restrict __value, struct itimerspec *__restrict __ovalue), __timerfd_settime64); # else # define timerfd_settime __timerfd_settime64 # endif #endif /* Return the next expiration time of UFD. */ extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW; #ifdef __USE_TIME_BITS64 # if defined(__REDIRECT_NTH) extern int __REDIRECT_NTH (timerfd_gettime, (int __ufd, struct itimerspec *__otmr), __timerfd_gettime64); # else # define timerfd_gettime __timerfd_gettime64 # endif #endif __END_DECLS #endif /* sys/timerfd.h */