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authorZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
committerZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
commit5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch)
tree4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/sysdeps/unix/sysv/linux/x86/bits/shm.h
parent199fc19d3aaaf57944ef036e15904febe877fc93 (diff)
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Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/x86/bits/shm.h')
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1 files changed, 109 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/x86/bits/shm.h b/REORG.TODO/sysdeps/unix/sysv/linux/x86/bits/shm.h
new file mode 100644
index 0000000000..5f8e2e1575
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/x86/bits/shm.h
@@ -0,0 +1,109 @@
+/* Copyright (C) 1995-2017 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
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_SHM_H
+# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
+#endif
+
+#include <bits/types.h>
+
+/* Permission flag for shmget. */
+#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
+#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
+
+/* Flags for `shmat'. */
+#define SHM_RDONLY 010000 /* attach read-only else read-write */
+#define SHM_RND 020000 /* round attach address to SHMLBA */
+#define SHM_REMAP 040000 /* take-over region on attach */
+#define SHM_EXEC 0100000 /* execution access */
+
+/* Commands for `shmctl'. */
+#define SHM_LOCK 11 /* lock segment (root only) */
+#define SHM_UNLOCK 12 /* unlock segment (root only) */
+
+__BEGIN_DECLS
+
+/* Segment low boundary address multiple. */
+#define SHMLBA (__getpagesize ())
+extern int __getpagesize (void) __THROW __attribute__ ((__const__));
+
+
+/* Type to count number of attaches. */
+typedef __syscall_ulong_t shmatt_t;
+
+/* Data structure describing a shared memory segment. */
+struct shmid_ds
+ {
+ struct ipc_perm shm_perm; /* operation permission struct */
+ size_t shm_segsz; /* size of segment in bytes */
+ __time_t shm_atime; /* time of last shmat() */
+#ifndef __x86_64__
+ unsigned long int __glibc_reserved1;
+#endif
+ __time_t shm_dtime; /* time of last shmdt() */
+#ifndef __x86_64__
+ unsigned long int __glibc_reserved2;
+#endif
+ __time_t shm_ctime; /* time of last change by shmctl() */
+#ifndef __x86_64__
+ unsigned long int __glibc_reserved3;
+#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_reserved4;
+ __syscall_ulong_t __glibc_reserved5;
+ };
+
+#ifdef __USE_MISC
+
+/* ipcs ctl commands */
+# define SHM_STAT 13
+# define SHM_INFO 14
+
+/* shm_mode upper byte flags */
+# define SHM_DEST 01000 /* segment will be destroyed on last detach */
+# define SHM_LOCKED 02000 /* segment will not be swapped */
+# define SHM_HUGETLB 04000 /* segment is mapped via hugetlb */
+# define SHM_NORESERVE 010000 /* don't check for reservations */
+
+struct shminfo
+ {
+ __syscall_ulong_t shmmax;
+ __syscall_ulong_t shmmin;
+ __syscall_ulong_t shmmni;
+ __syscall_ulong_t shmseg;
+ __syscall_ulong_t shmall;
+ __syscall_ulong_t __glibc_reserved1;
+ __syscall_ulong_t __glibc_reserved2;
+ __syscall_ulong_t __glibc_reserved3;
+ __syscall_ulong_t __glibc_reserved4;
+ };
+
+struct shm_info
+ {
+ int used_ids;
+ __syscall_ulong_t shm_tot; /* total allocated shm */
+ __syscall_ulong_t shm_rss; /* total resident shm */
+ __syscall_ulong_t shm_swp; /* total swapped shm */
+ __syscall_ulong_t swap_attempts;
+ __syscall_ulong_t swap_successes;
+ };
+
+#endif /* __USE_MISC */
+
+__END_DECLS