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a4ed0471d7
It was raised on libc-help [1] that some Linux kernel interfaces expect the libc to define __USE_TIME_BITS64 to indicate the time_t size for the kABI. Different than defined by the initial y2038 design document [2], the __USE_TIME_BITS64 is only defined for ABIs that support more than one time_t size (by defining the _TIME_BITS for each module). The 64 bit time_t redirects are now enabled using a different internal define (__USE_TIME64_REDIRECTS). There is no expected change in semantic or code generation. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and arm-linux-gnueabi [1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html [2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign Reviewed-by: DJ Delorie <dj@redhat.com>
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/* Copyright (C) 2008-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_TIMERFD_H
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#define _SYS_TIMERFD_H 1
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#include <time.h>
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#include <bits/types/struct_itimerspec.h>
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/* Get the platform-dependent flags. */
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#include <bits/timerfd.h>
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/* Bits to be set in the FLAGS parameter of `timerfd_settime'. */
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enum
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{
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TFD_TIMER_ABSTIME = 1 << 0,
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#define TFD_TIMER_ABSTIME TFD_TIMER_ABSTIME
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TFD_TIMER_CANCEL_ON_SET = 1 << 1
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#define TFD_TIMER_CANCEL_ON_SET TFD_TIMER_CANCEL_ON_SET
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};
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__BEGIN_DECLS
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/* Return file descriptor for new interval timer source. */
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extern int timerfd_create (__clockid_t __clock_id, int __flags) __THROW;
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/* Set next expiration time of interval timer source UFD to UTMR. If
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FLAGS has the TFD_TIMER_ABSTIME flag set the timeout value is
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absolute. Optionally return the old expiration time in OTMR. */
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extern int timerfd_settime (int __ufd, int __flags,
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const struct itimerspec *__utmr,
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struct itimerspec *__otmr) __THROW;
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#ifdef __USE_TIME64_REDIRECTS
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# if defined(__REDIRECT_NTH)
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extern int __REDIRECT_NTH (timerfd_settime,
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(int __ufd, int __flags,
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const struct itimerspec *__restrict __value,
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struct itimerspec *__restrict __ovalue),
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__timerfd_settime64);
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# else
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# define timerfd_settime __timerfd_settime64
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# endif
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#endif
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/* Return the next expiration time of UFD. */
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extern int timerfd_gettime (int __ufd, struct itimerspec *__otmr) __THROW;
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#ifdef __USE_TIME64_REDIRECTS
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# if defined(__REDIRECT_NTH)
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extern int __REDIRECT_NTH (timerfd_gettime, (int __ufd,
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struct itimerspec *__otmr),
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__timerfd_gettime64);
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# else
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# define timerfd_gettime __timerfd_gettime64
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# endif
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#endif
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__END_DECLS
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#endif /* sys/timerfd.h */
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