[PATCH v2 2/3] y2038: Convert mtx_timedlock to support 64 bit time

[Adhemerval Zanella]

On 03/11/2020 06:14, Lukasz Majewski wrote:
> The mtx_timedlock function has been converted to support 64 bit time.
> It was also necessary to provide Linux specific copy of it to avoid
> problems on i686-gnu (i.e. HURD) port, which is not providing
> pthread_mutex_timedlock() supporting 64 bit time.
> 
> The mtx_timedlock is a wrapper on POSIX threads to provide C11 standard
> threads interface. It directly calls __pthread_mutex_timedlock64().
> 
> Build tests:
> ./src/scripts/build-many-glibcs.py glibcs
> ---
>  sysdeps/pthread/thrd_priv.h             |  4 +++
>  sysdeps/unix/sysv/linux/mtx_timedlock.c | 43 +++++++++++++++++++++++++
>  2 files changed, 47 insertions(+)
>  create mode 100644 sysdeps/unix/sysv/linux/mtx_timedlock.c
> 
> diff --git a/sysdeps/pthread/thrd_priv.h b/sysdeps/pthread/thrd_priv.h
> index dbfec0df7a..efe453bdec 100644
> --- a/sysdeps/pthread/thrd_priv.h
> +++ b/sysdeps/pthread/thrd_priv.h
> @@ -26,10 +26,14 @@
>  
>  #if __TIMESIZE == 64
>  # define __cnd_timedwait64 __cnd_timedwait
> +# define __mtx_timedlock64 __mtx_timedlock
>  #else
>  extern int __cnd_timedwait64 (cnd_t *restrict cond, mtx_t *restrict mutex,
>                                const struct __timespec64* restrict time_point);
>  libpthread_hidden_proto (__cnd_timedwait64)
> +extern int __mtx_timedlock64 (mtx_t *restrict mutex,
> +                              const struct __timespec64 *restrict time_point);
> +libpthread_hidden_proto (__mtx_timedlock64)
>  #endif
>  
>  static __always_inline int


Same as previous patch, I think this should be moved to a Linux internal
thread.h header.

> diff --git a/sysdeps/unix/sysv/linux/mtx_timedlock.c b/sysdeps/unix/sysv/linux/mtx_timedlock.c
> new file mode 100644
> index 0000000000..ef57dd1e41
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/mtx_timedlock.c
> @@ -0,0 +1,43 @@
> +/* C11 threads mutex timed lock implementation - Linux variant.
> +   Copyright (C) 2020 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/>.  */
> +
> +#include <time.h>
> +#include "thrd_priv.h"
> +
> +int
> +__mtx_timedlock64 (mtx_t *restrict mutex,
> +                   const struct __timespec64 *restrict time_point)
> +{
> +  int err_code = __pthread_mutex_timedlock64 ((pthread_mutex_t *)mutex,
> +                                              time_point);
> +  return thrd_err_map (err_code);
> +}
> +
> +#if __TIMESIZE != 64
> +libpthread_hidden_def (__mtx_timedlock64)
> +
> +int
> +__mtx_timedlock (mtx_t *restrict mutex,
> +                 const struct timespec *restrict time_point)
> +{
> +  struct __timespec64 ts64 = valid_timespec_to_timespec64 (*time_point);
> +
> +  return __mtx_timedlock64(mutex, &ts64);

Space after function name.

> +}
> +#endif
> +weak_alias (__mtx_timedlock, mtx_timedlock)
>