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* [glibc] sysvipc: Split out linux struct shmid_ds
@ 2020-07-09 15:32 Adhemerval Zanella
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From: Adhemerval Zanella @ 2020-07-09 15:32 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=380b7ced6ab792cf2095377498ed4bbc2716f139
commit 380b7ced6ab792cf2095377498ed4bbc2716f139
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue Jun 30 10:30:14 2020 -0300
sysvipc: Split out linux struct shmid_ds
This will allow us to have architectures specify their own version.
Not semantic changes expected. Checked with a build against the
all affected ABIs.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diff:
---
sysdeps/unix/sysv/linux/Makefile | 1 +
sysdeps/unix/sysv/linux/bits/shm.h | 34 +------------
.../unix/sysv/linux/bits/types/struct_shmid_ds.h | 57 ++++++++++++++++++++++
3 files changed, 59 insertions(+), 33 deletions(-)
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index f15392b499..a8f171bdc5 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -93,6 +93,7 @@ sysdep_headers += sys/mount.h sys/acct.h \
bits/termios-misc.h \
bits/types/struct_semid_ds.h \
bits/types/struct_msqid_ds.h \
+ bits/types/struct_shmid_ds.h \
bits/ipc-perm.h \
sys/rseq.h bits/rseq.h
diff --git a/sysdeps/unix/sysv/linux/bits/shm.h b/sysdeps/unix/sysv/linux/bits/shm.h
index 113c05ee89..9ef6aeaf92 100644
--- a/sysdeps/unix/sysv/linux/bits/shm.h
+++ b/sysdeps/unix/sysv/linux/bits/shm.h
@@ -43,39 +43,7 @@ __BEGIN_DECLS
/* Type to count number of attaches. */
typedef __syscall_ulong_t shmatt_t;
-#if __SHM_PAD_BEFORE_TIME
-# define __SHM_PAD_TIME(NAME, RES) \
- unsigned long int __glibc_reserved ## RES; __time_t NAME
-#elif __SHM_PAD_AFTER_TIME
-# define __SHM_PAD_TIME(NAME, RES) \
- __time_t NAME; unsigned long int __glibc_reserved ## RES
-#else
-# define __SHM_PAD_TIME(NAME, RES) \
- __time_t NAME
-#endif
-
-/* Data structure describing a shared memory segment. */
-struct shmid_ds
- {
- struct ipc_perm shm_perm; /* operation permission struct */
-#if !__SHM_SEGSZ_AFTER_TIME
- size_t shm_segsz; /* size of segment in bytes */
-#endif
- __SHM_PAD_TIME (shm_atime, 1); /* time of last shmat() */
- __SHM_PAD_TIME (shm_dtime, 2); /* time of last shmdt() */
- __SHM_PAD_TIME (shm_ctime, 3); /* time of last change by shmctl() */
-#if __SHM_PAD_BETWEEN_TIME_AND_SEGSZ
- unsigned long int __glibc_reserved4;
-#endif
-#if __SHM_SEGSZ_AFTER_TIME
- size_t shm_segsz; /* size of segment in bytes */
-#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;
- };
+#include <bits/types/struct_shmid_ds.h>
#ifdef __USE_MISC
diff --git a/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h b/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h
new file mode 100644
index 0000000000..938bbedfcd
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/bits/types/struct_shmid_ds.h
@@ -0,0 +1,57 @@
+/* Generic implementation of the shared memory struct shmid_ds.
+ 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/>. */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/types/struct_shmid_ds.h> directly; use <sys/shm.h> instead."
+#endif
+
+#include <bits/shm-pad.h>
+
+#if __SHM_PAD_BEFORE_TIME
+# define __SHM_PAD_TIME(NAME, RES) \
+ unsigned long int __glibc_reserved ## RES; __time_t NAME
+#elif __SHM_PAD_AFTER_TIME
+# define __SHM_PAD_TIME(NAME, RES) \
+ __time_t NAME; unsigned long int __glibc_reserved ## RES
+#else
+# define __SHM_PAD_TIME(NAME, RES) \
+ __time_t NAME
+#endif
+
+/* Data structure describing a shared memory segment. */
+struct shmid_ds
+ {
+ struct ipc_perm shm_perm; /* operation permission struct */
+#if !__SHM_SEGSZ_AFTER_TIME
+ size_t shm_segsz; /* size of segment in bytes */
+#endif
+ __SHM_PAD_TIME (shm_atime, 1); /* time of last shmat() */
+ __SHM_PAD_TIME (shm_dtime, 2); /* time of last shmdt() */
+ __SHM_PAD_TIME (shm_ctime, 3); /* time of last change by shmctl() */
+#if __SHM_PAD_BETWEEN_TIME_AND_SEGSZ
+ unsigned long int __glibc_reserved4;
+#endif
+#if __SHM_SEGSZ_AFTER_TIME
+ size_t shm_segsz; /* size of segment in bytes */
+#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;
+ };
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2020-07-09 15:32 [glibc] sysvipc: Split out linux struct shmid_ds Adhemerval Zanella
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