The C and C++ Include Header Files

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


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

     1	/* Definitions for POSIX memory map interface.  Linux generic version.
     2	   Copyright (C) 2001-2024 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-linux.h> directly; include <sys/mman.h> instead."
    21	#endif
    22	
    23	/* The following definitions basically come from the kernel headers.
    24	   But the kernel header is not namespace clean.  */
    25	
    26	
    27	/* Protections are chosen from these bits, OR'd together.  The
    28	   implementation does not necessarily support PROT_EXEC or PROT_WRITE
    29	   without PROT_READ.  The only guarantees are that no writing will be
    30	   allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
    31	
    32	#define PROT_READ	0x1		/* Page can be read.  */
    33	#define PROT_WRITE	0x2		/* Page can be written.  */
    34	#define PROT_EXEC	0x4		/* Page can be executed.  */
    35	#define PROT_NONE	0x0		/* Page can not be accessed.  */
    36	#define PROT_GROWSDOWN	0x01000000	/* Extend change to start of
    37						   growsdown vma (mprotect only).  */
    38	#define PROT_GROWSUP	0x02000000	/* Extend change to start of
    39						   growsup vma (mprotect only).  */
    40	
    41	/* Sharing types (must choose one and only one of these).  */
    42	#define MAP_SHARED	0x01		/* Share changes.  */
    43	#define MAP_PRIVATE	0x02		/* Changes are private.  */
    44	#define MAP_SHARED_VALIDATE	0x03	/* Share changes and validate
    45						   extension flags.  */
    46	#define MAP_TYPE	0x0f		/* Mask for type of mapping.  */
    47	
    48	/* Other flags.  */
    49	#define MAP_FIXED	0x10		/* Interpret addr exactly.  */
    50	#define MAP_FILE	0
    51	#ifdef __MAP_ANONYMOUS
    52	# define MAP_ANONYMOUS	__MAP_ANONYMOUS	/* Don't use a file.  */
    53	#else
    54	# define MAP_ANONYMOUS	0x20		/* Don't use a file.  */
    55	#endif
    56	#define MAP_ANON	MAP_ANONYMOUS
    57	/* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.  */
    58	#define MAP_HUGE_SHIFT	26
    59	#define MAP_HUGE_MASK	0x3f
    60	
    61	/* Flags to `msync'.  */
    62	#define MS_ASYNC	1		/* Sync memory asynchronously.  */
    63	#define MS_SYNC		4		/* Synchronous memory sync.  */
    64	#define MS_INVALIDATE	2		/* Invalidate the caches.  */
    65	
    66	/* Advice to `madvise'.  */
    67	#ifdef __USE_MISC
    68	# define MADV_NORMAL	  0	/* No further special treatment.  */
    69	# define MADV_RANDOM	  1	/* Expect random page references.  */
    70	# define MADV_SEQUENTIAL  2	/* Expect sequential page references.  */
    71	# define MADV_WILLNEED	  3	/* Will need these pages.  */
    72	# define MADV_DONTNEED	  4	/* Don't need these pages.  */
    73	# define MADV_FREE	  8	/* Free pages only if memory pressure.  */
    74	# define MADV_REMOVE	  9	/* Remove these pages and resources.  */
    75	# define MADV_DONTFORK	  10	/* Do not inherit across fork.  */
    76	# define MADV_DOFORK	  11	/* Do inherit across fork.  */
    77	# define MADV_MERGEABLE	  12	/* KSM may merge identical pages.  */
    78	# define MADV_UNMERGEABLE 13	/* KSM may not merge identical pages.  */
    79	# define MADV_HUGEPAGE	  14	/* Worth backing with hugepages.  */
    80	# define MADV_NOHUGEPAGE  15	/* Not worth backing with hugepages.  */
    81	# define MADV_DONTDUMP	  16    /* Explicitly exclude from the core dump,
    82	                                   overrides the coredump filter bits.  */
    83	# define MADV_DODUMP	  17	/* Clear the MADV_DONTDUMP flag.  */
    84	# define MADV_WIPEONFORK  18	/* Zero memory on fork, child only.  */
    85	# define MADV_KEEPONFORK  19	/* Undo MADV_WIPEONFORK.  */
    86	# define MADV_COLD        20	/* Deactivate these pages.  */
    87	# define MADV_PAGEOUT     21	/* Reclaim these pages.  */
    88	# define MADV_POPULATE_READ 22	/* Populate (prefault) page tables
    89					   readable.  */
    90	# define MADV_POPULATE_WRITE 23	/* Populate (prefault) page tables
    91					   writable.  */
    92	# define MADV_DONTNEED_LOCKED 24 /* Like MADV_DONTNEED, but drop
    93					    locked pages too.  */
    94	# define MADV_COLLAPSE    25	/* Synchronous hugepage collapse.  */
    95	# define MADV_HWPOISON	  100	/* Poison a page for testing.  */
    96	#endif
    97	
    98	/* The POSIX people had to invent similar names for the same things.  */
    99	#ifdef __USE_XOPEN2K
   100	# define POSIX_MADV_NORMAL	0 /* No further special treatment.  */
   101	# define POSIX_MADV_RANDOM	1 /* Expect random page references.  */
   102	# define POSIX_MADV_SEQUENTIAL	2 /* Expect sequential page references.  */
   103	# define POSIX_MADV_WILLNEED	3 /* Will need these pages.  */
   104	# define POSIX_MADV_DONTNEED	4 /* Don't need these pages.  */
   105	#endif
   106	
   107	/* Flags for `mlockall'.  */
   108	#ifndef MCL_CURRENT
   109	# define MCL_CURRENT	1		/* Lock all currently mapped pages.  */
   110	# define MCL_FUTURE	2		/* Lock all additions to address
   111						   space.  */
   112	# define MCL_ONFAULT	4		/* Lock all pages that are
   113						   faulted in.  */
   114	#endif
   115	
   116	#include <bits/mman-shared.h>