The C and C++ Include Header Files

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


$ cat -n /usr/include/x86_64-linux-gnu/sys/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	#define _SYS_SHM_H	1
    20	
    21	#include <features.h>
    22	
    23	#define __need_size_t
    24	#include <stddef.h>
    25	
    26	/* Get common definition of System V style IPC.  */
    27	#include <sys/ipc.h>
    28	
    29	/* Get system dependent definition of `struct shmid_ds' and more.  */
    30	#include <bits/shm.h>
    31	
    32	/* Define types required by the standard.  */
    33	#include <bits/types/time_t.h>
    34	
    35	#ifdef __USE_XOPEN
    36	# ifndef __pid_t_defined
    37	typedef __pid_t pid_t;
    38	#  define __pid_t_defined
    39	# endif
    40	#endif	/* X/Open */
    41	
    42	
    43	__BEGIN_DECLS
    44	
    45	/* The following System V style IPC functions implement a shared memory
    46	   facility.  The definition is found in XPG4.2.  */
    47	
    48	/* Shared memory control operation.  */
    49	#ifndef __USE_TIME_BITS64
    50	extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW;
    51	#else
    52	# ifdef __REDIRECT_NTH
    53	extern int __REDIRECT_NTH (shmctl,
    54	                           (int __shmid, int __cmd, struct shmid_ds *__buf),
    55	                           __shmctl64);
    56	# else
    57	#  define shmctl __shmctl64
    58	# endif
    59	#endif
    60	
    61	/* Get shared memory segment.  */
    62	extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW;
    63	
    64	/* Attach shared memory segment.  */
    65	extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
    66	     __THROW;
    67	
    68	/* Detach shared memory segment.  */
    69	extern int shmdt (const void *__shmaddr) __THROW;
    70	
    71	__END_DECLS
    72	
    73	#endif /* sys/shm.h */