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y2038: Use a common definition for shmid_ds

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Instead of replicate the same definitions from struct_shmid64_ds.h
on the multiple struct_shmid_ds.h, use a common header which is included
when required (struct_shmid64_ds_helper.h).

The __USE_TIME_BITS64 is not defined internally yet, although the
internal header is used when building the 64-bit semctl implementation.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella
2021-02-17 18:38:09 -03:00
parent f98beb65f5
commit 7194337c3e
8 changed files with 68 additions and 26 deletions
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9
sysdeps/unix/sysv/linux/bits/types/struct_shmid64_ds.h
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@ -25,13 +25,6 @@
#else
struct __shmid64_ds
{
struct ipc_perm shm_perm; /* operation permission struct */
size_t shm_segsz; /* size of segment in bytes */
__time64_t shm_atime; /* time of last shmat() */
__time64_t shm_dtime; /* time of last shmdt() */
__time64_t shm_ctime; /* time of last change by shmctl() */
__pid_t shm_cpid; /* pid of creator */
__pid_t shm_lpid; /* pid of last shmop */
shmatt_t shm_nattch; /* number of current attaches */
# include <bits/types/struct_shmid64_ds_helper.h>
};
#endif

28
sysdeps/unix/sysv/linux/bits/types/struct_shmid64_ds_helper.h Normal file
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@ -0,0 +1,28 @@
/* Common definitions for struct semid_ds with 64-bit time.
Copyright (C) 2020-2021 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/>. */
struct ipc_perm shm_perm; /* operation permission struct */
size_t shm_segsz; /* size of segment in bytes */
__time64_t shm_atime; /* time of last shmat() */
__time64_t shm_dtime; /* time of last shmdt() */
__time64_t shm_ctime; /* time of last change by shmctl() */
__pid_t shm_cpid; /* pid of creator */
__pid_t shm_lpid; /* pid of last shmop */
shmatt_t shm_nattch; /* number of current attaches */
unsigned long int __glibc_reserved5;
unsigned long int __glibc_reserved6;

10
sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h
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@ -23,23 +23,27 @@
/* Data structure describing a shared memory segment. */
struct shmid_ds
{
#ifdef __USE_TIME_BITS64
# include <bits/types/struct_shmid64_ds_helper.h>
#else
struct ipc_perm shm_perm; /* operation permission struct */
size_t shm_segsz; /* size of segment in bytes */
#if __TIMESIZE == 32
# if __TIMESIZE == 32
__time_t shm_atime; /* time of last shmat() */
unsigned long int __shm_atime_high;
__time_t shm_dtime; /* time of last shmdt() */
unsigned long int __shm_dtime_high;
__time_t shm_ctime; /* time of last change by shmctl() */
unsigned long int __shm_ctime_high;
#else
# else
__time_t shm_atime; /* time of last shmat() */
__time_t shm_dtime; /* time of last shmdt() */
__time_t shm_ctime; /* time of last change by shmctl() */
#endif
# endif
__pid_t shm_cpid; /* pid of creator */
__pid_t shm_lpid; /* pid of last shmop */
shmatt_t shm_nattch; /* number of current attaches */
__syscall_ulong_t __glibc_reserved5;
__syscall_ulong_t __glibc_reserved6;
#endif
};