Dear Community,
> This patch replaces auto generated wrapper (as described in
> sysdeps/unix/sysv/linux/syscalls.list) for timerfd_gettime with one
> which adds extra support for reading 64 bit time values on machines
> with __TIMESIZE != 64.
> There is no functional change for architectures already supporting 64
> bit time ABI.
>
> This patch is conceptually identical to timer_gettime conversion
> already done in sysdeps/unix/sysv/linux/timer_gettime.c.
> Please refer to corresponding commit message for detailed description
> of introduced functions and the testing procedure.
>
> ---
> Changes for v3:
> - Add missing libc_hidden_def()
>
> Changes for v2:
> - Remove "Contributed by" from the file header
> - Remove early check for (fd < 0) in __timerfd_gettime64 as the fd
> correctness check is already done in Linux kernel
> - Add single descriptive comment line to provide concise explanation
> of the code
> ---
> include/time.h | 3 +
> sysdeps/unix/sysv/linux/Makefile | 3 +-
> sysdeps/unix/sysv/linux/syscalls.list | 1 -
> sysdeps/unix/sysv/linux/timerfd_gettime.c | 68
> +++++++++++++++++++++++ 4 files changed, 73 insertions(+), 2
> deletions(-) create mode 100644
> sysdeps/unix/sysv/linux/timerfd_gettime.c
>
> diff --git a/include/time.h b/include/time.h
> index e5e8246eac..eb5082b4d7 100644
> --- a/include/time.h
> +++ b/include/time.h
> @@ -181,9 +181,12 @@ libc_hidden_proto (__futimens64);
>
> #if __TIMESIZE == 64
> # define __timer_gettime64 __timer_gettime
> +# define __timerfd_gettime64 __timerfd_gettime
> #else
> extern int __timer_gettime64 (timer_t timerid, struct __itimerspec64
> *value); +extern int __timerfd_gettime64 (int fd, struct
> __itimerspec64 *value); libc_hidden_proto (__timer_gettime64);
> +libc_hidden_proto (__timerfd_gettime64);
> #endif
>
> #if __TIMESIZE == 64
> diff --git a/sysdeps/unix/sysv/linux/Makefile
> b/sysdeps/unix/sysv/linux/Makefile index 07776d28ea..e599fcec23 100644
> --- a/sysdeps/unix/sysv/linux/Makefile
> +++ b/sysdeps/unix/sysv/linux/Makefile
> @@ -18,7 +18,8 @@ sysdep_routines += adjtimex clone umount umount2
> readahead \ setfsuid setfsgid epoll_pwait signalfd \
> eventfd eventfd_read eventfd_write prlimit \
> personality epoll_wait tee vmsplice splice \
> - open_by_handle_at mlock2 pkey_mprotect pkey_set
> pkey_get
> + open_by_handle_at mlock2 pkey_mprotect pkey_set
> pkey_get \
> + timerfd_gettime
>
> CFLAGS-gethostid.c = -fexceptions
> CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables
> diff --git a/sysdeps/unix/sysv/linux/syscalls.list
> b/sysdeps/unix/sysv/linux/syscalls.list index 603e517ca6..385007c662
> 100644 --- a/sysdeps/unix/sysv/linux/syscalls.list
> +++ b/sysdeps/unix/sysv/linux/syscalls.list
> @@ -95,7 +95,6 @@ mq_setattr - mq_getsetattr
> i:ipp mq_setattr
> timerfd_create EXTRA timerfd_create i:ii
> timerfd_create timerfd_settime EXTRA
> timerfd_settime i:iipp timerfd_settime
> -timerfd_gettime EXTRA timerfd_gettime
> i:ip timerfd_gettime fanotify_init EXTRA
> fanotify_init i:ii fanotify_init
> diff --git a/sysdeps/unix/sysv/linux/timerfd_gettime.c
> b/sysdeps/unix/sysv/linux/timerfd_gettime.c new file mode 100644
> index 0000000000..ff5c4550b3
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/timerfd_gettime.c
> @@ -0,0 +1,68 @@
> +/* 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 . */
> +
> +#include
> +#include
> +#include
> +#include
> +#include
> +
> +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
> +}
> +
> +#if __TIMESIZE != 64
> +libc_hidden_def (__timerfd_gettime64)
> +
> +int
> +__timerfd_gettime (int fd, struct itimerspec *value)
> +{
> + struct __itimerspec64 its64;
> + int retval = __timerfd_gettime64 (fd, &its64);
> + if (retval == 0)
> + {
> + value->it_interval = valid_timespec64_to_timespec
> (its64.it_interval);
> + value->it_value = valid_timespec64_to_timespec
> (its64.it_value);
> + }
> +
> + return retval;
> +}
> +#endif
> +strong_alias (__timerfd_gettime, timerfd_gettime)
Are there any more comments regarding this patch?
(Yes, I will need to update the year from 2019 to 2020, but this is
rather a cosmetic change).
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de