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The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/bits/shm.h


$ cat -n /usr/include/x86_64-linux-gnu/bits/shm.h

     1	/* Copyright (C) 1995-2024 Free Software Foundation, Inc.
     2	   This file is part of the GNU C Library.
     3	
     4	   The GNU C Library is free software; you can redistribute it and/or
     5	   modify it under the terms of the GNU Lesser General Public
     6	   License as published by the Free Software Foundation; either
     7	   version 2.1 of the License, or (at your option) any later version.
     8	
     9	   The GNU C Library is distributed in the hope that it will be useful,
    10	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    11	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12	   Lesser General Public License for more details.
    13	
    14	   You should have received a copy of the GNU Lesser General Public
    15	   License along with the GNU C Library; if not, see
    16	   <https://www.gnu.org/licenses/>.  */
    17	
    18	#ifndef _SYS_SHM_H
    19	# error "Never include <bits/shm.h> directly; use <sys/shm.h> instead."
    20	#endif
    21	
    22	#include <bits/types.h>
    23	#include <bits/wordsize.h>
    24	#include <bits/shmlba.h>
    25	
    26	/* Permission flag for shmget.  */
    27	#define SHM_R		0400		/* or S_IRUGO from <linux/stat.h> */
    28	#define SHM_W		0200		/* or S_IWUGO from <linux/stat.h> */
    29	
    30	/* Flags for `shmat'.  */
    31	#define SHM_RDONLY	010000		/* attach read-only else read-write */
    32	#define SHM_RND		020000		/* round attach address to SHMLBA */
    33	#define SHM_REMAP	040000		/* take-over region on attach */
    34	#define SHM_EXEC	0100000		/* execution access */
    35	
    36	/* Commands for `shmctl'.  */
    37	#define SHM_LOCK	11		/* lock segment (root only) */
    38	#define SHM_UNLOCK	12		/* unlock segment (root only) */
    39	
    40	__BEGIN_DECLS
    41	
    42	/* Type to count number of attaches.  */
    43	typedef __syscall_ulong_t shmatt_t;
    44	
    45	#include <bits/types/struct_shmid_ds.h>
    46	#include <bits/types/struct_shmid64_ds.h>
    47	
    48	#ifdef __USE_MISC
    49	
    50	/* ipcs ctl commands */
    51	# define SHM_STAT 	13
    52	# define SHM_INFO 	14
    53	# define SHM_STAT_ANY	15
    54	
    55	/* shm_mode upper byte flags */
    56	# define SHM_DEST	01000	/* segment will be destroyed on last detach */
    57	# define SHM_LOCKED	02000   /* segment will not be swapped */
    58	# define SHM_HUGETLB	04000	/* segment is mapped via hugetlb */
    59	# define SHM_NORESERVE	010000	/* don't check for reservations */
    60	
    61	struct	shminfo
    62	  {
    63	    __syscall_ulong_t shmmax;
    64	    __syscall_ulong_t shmmin;
    65	    __syscall_ulong_t shmmni;
    66	    __syscall_ulong_t shmseg;
    67	    __syscall_ulong_t shmall;
    68	    __syscall_ulong_t __glibc_reserved1;
    69	    __syscall_ulong_t __glibc_reserved2;
    70	    __syscall_ulong_t __glibc_reserved3;
    71	    __syscall_ulong_t __glibc_reserved4;
    72	  };
    73	
    74	struct shm_info
    75	  {
    76	    int used_ids;
    77	    __syscall_ulong_t shm_tot;	/* total allocated shm */
    78	    __syscall_ulong_t shm_rss;	/* total resident shm */
    79	    __syscall_ulong_t shm_swp;	/* total swapped shm */
    80	    __syscall_ulong_t swap_attempts;
    81	    __syscall_ulong_t swap_successes;
    82	  };
    83	
    84	#endif /* __USE_MISC */
    85	
    86	__END_DECLS