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Re: [PATCH v2 1/2] y2038: linux: Provide __timerfd_gettime64 implementation
- From: Andreas Schwab <schwab at suse dot de>
- To: Lukasz Majewski <lukma at denx dot de>
- Cc: Joseph Myers <joseph at codesourcery dot com>, Paul Eggert <eggert at cs dot ucla dot edu>, Adhemerval Zanella <adhemerval dot zanella at linaro dot org>, Alistair Francis <alistair23 at gmail dot com>, Alistair Francis <alistair dot francis at wdc dot com>, GNU C Library <libc-alpha at sourceware dot org>, Siddhesh Poyarekar <siddhesh at gotplt dot org>, Florian Weimer <fweimer at redhat dot com>, Florian Weimer <fw at deneb dot enyo dot de>, Zack Weinberg <zackw at panix dot com>, Carlos O'Donell <carlos at redhat dot com>
- Date: Wed, 11 Dec 2019 18:48:18 +0100
- Subject: Re: [PATCH v2 1/2] y2038: linux: Provide __timerfd_gettime64 implementation
- References: <20191211165444.18951-1-lukma@denx.de>
On Dez 11 2019, Lukasz Majewski wrote:
> diff --git a/sysdeps/unix/sysv/linux/timerfd_gettime.c b/sysdeps/unix/sysv/linux/timerfd_gettime.c
> new file mode 100644
> index 0000000000..18e1fd2991
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/timerfd_gettime.c
> @@ -0,0 +1,66 @@
> +/* timerfd_gettime -- get the timer setting referred to by file descriptor.
> + Copyright (C) 2019 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; see the file COPYING.LIB. If
> + not, see <https://www.gnu.org/licenses/>. */
> +
> +#include <errno.h>
> +#include <stdlib.h>
> +#include <time.h>
> +#include <sysdep.h>
> +#include <kernel-features.h>
> +
> +int
> +__timerfd_gettime64 (int fd, struct __itimerspec64 *value)
> +{
> +#ifdef __ASSUME_TIME64_SYSCALLS
> +# ifndef __NR_timerfd_gettime64
> +# define __NR_timerfd_gettime64 __NR_timerfd_gettime
> +# endif
> + return INLINE_SYSCALL_CALL (timerfd_gettime64, fd, value);
> +#else
> +# ifdef __NR_timerfd_gettime64
> + int ret = INLINE_SYSCALL_CALL (timerfd_gettime64, fd, value);
> + if (ret == 0 || errno != ENOSYS)
> + return ret;
> +# endif
> + struct itimerspec its32;
> + int retval = INLINE_SYSCALL_CALL (timerfd_gettime, fd, &its32);
> + if (retval == 0)
> + {
> + value->it_interval = valid_timespec_to_timespec64 (its32.it_interval);
> + value->it_value = valid_timespec_to_timespec64 (its32.it_value);
> + }
> +
> + return retval;
> +#endif
> +}
You need a libc_hidden_def matching the libc_hidden_proto in
include/time.h.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."