Where Online Learning is simpler!

The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/bits/mman-shared.h


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

     1	/* Memory-mapping-related declarations/definitions, not architecture-specific.
     2	   Copyright (C) 2017-2024 Free Software Foundation, Inc.
     3	   This file is part of the GNU C Library.
     4	
     5	   The GNU C Library is free software; you can redistribute it and/or
     6	   modify it under the terms of the GNU Lesser General Public
     7	   License as published by the Free Software Foundation; either
     8	   version 2.1 of the License, or (at your option) any later version.
     9	
    10	   The GNU C Library is distributed in the hope that it will be useful,
    11	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    12	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13	   Lesser General Public License for more details.
    14	
    15	   You should have received a copy of the GNU Lesser General Public
    16	   License along with the GNU C Library; if not, see
    17	   <https://www.gnu.org/licenses/>.  */
    18	
    19	#ifndef _SYS_MMAN_H
    20	# error "Never use <bits/mman-shared.h> directly; include <sys/mman.h> instead."
    21	#endif
    22	
    23	#ifdef __USE_GNU
    24	/* Flags for mremap.  */
    25	# define MREMAP_MAYMOVE	1
    26	# define MREMAP_FIXED	2
    27	# define MREMAP_DONTUNMAP 4
    28	
    29	/* Flags for memfd_create.  */
    30	# ifndef MFD_CLOEXEC
    31	#  define MFD_CLOEXEC 1U
    32	#  define MFD_ALLOW_SEALING 2U
    33	#  define MFD_HUGETLB 4U
    34	# endif
    35	# ifndef MFD_NOEXEC_SEAL
    36	#  define MFD_NOEXEC_SEAL 8U
    37	#  define MFD_EXEC 0x10U
    38	# endif
    39	
    40	/* Flags for mlock2.  */
    41	# ifndef MLOCK_ONFAULT
    42	#  define MLOCK_ONFAULT 1U
    43	# endif
    44	
    45	/* Access rights for pkey_alloc.  */
    46	# ifndef PKEY_DISABLE_ACCESS
    47	#  define PKEY_DISABLE_ACCESS 0x1
    48	#  define PKEY_DISABLE_WRITE 0x2
    49	# endif
    50	
    51	__BEGIN_DECLS
    52	
    53	/* Create a new memory file descriptor.  NAME is a name for debugging.
    54	   FLAGS is a combination of the MFD_* constants.  */
    55	int memfd_create (const char *__name, unsigned int __flags) __THROW;
    56	
    57	/* Lock pages from ADDR (inclusive) to ADDR + LENGTH (exclusive) into
    58	   memory.  FLAGS is a combination of the MLOCK_* flags above.  */
    59	int mlock2 (const void *__addr, size_t __length, unsigned int __flags) __THROW;
    60	
    61	/* Allocate a new protection key, with the PKEY_DISABLE_* bits
    62	   specified in ACCESS_RIGHTS.  The protection key mask for the
    63	   current thread is updated to match the access privilege for the new
    64	   key.  */
    65	int pkey_alloc (unsigned int __flags, unsigned int __access_rights) __THROW;
    66	
    67	/* Update the access rights for the current thread for KEY, which must
    68	   have been allocated using pkey_alloc.  */
    69	int pkey_set (int __key, unsigned int __access_rights) __THROW;
    70	
    71	/* Return the access rights for the current thread for KEY, which must
    72	   have been allocated using pkey_alloc.  */
    73	int pkey_get (int __key) __THROW;
    74	
    75	/* Free an allocated protection key, which must have been allocated
    76	   using pkey_alloc.  */
    77	int pkey_free (int __key) __THROW;
    78	
    79	/* Apply memory protection flags for KEY to the specified address
    80	   range.  */
    81	int pkey_mprotect (void *__addr, size_t __len, int __prot, int __pkey) __THROW;
    82	
    83	__END_DECLS
    84	
    85	#endif /* __USE_GNU */