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/* Definitions for POSIX memory map interface. FreeBSD version.
Copyright (C) 1994-1998, 2000-2002 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _SYS_MMAN_H
# error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
#endif
#include <features.h>
#include <stddef.h>
/* Protections are chosen from these bits, OR'd together. The
implementation does not necessarily support PROT_EXEC or PROT_WRITE
without PROT_READ. The only guarantees are that no writing will be
allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
#define PROT_NONE 0x00 /* No access. */
#define PROT_READ 0x01 /* Pages can be read. */
#define PROT_WRITE 0x02 /* Pages can be written. */
#define PROT_EXEC 0x04 /* Pages can be executed. */
/* Flags contain mapping type, sharing type and options. */
/* Mapping type (must choose one and only one of these). */
#ifdef __USE_MISC
# define MAP_FILE 0x0000 /* Mapped from a file or device. */
# define MAP_ANON 0x1000 /* Allocated from anonymous virtual memory. */
# define MAP_TYPE 0x1000 /* Mask for type field. */
# ifdef __USE_MISC
# define MAP_ANONYMOUS MAP_ANON /* Linux name. */
# endif
#endif
/* Sharing types (must choose one and only one of these). */
#define MAP_SHARED 0x0001 /* Share changes. */
#define MAP_PRIVATE 0x0002 /* Changes private; copy pages on write. */
#ifdef __USE_MISC
# define MAP_COPY MAP_PRIVATE /* Virtual copy of region at mapping time. */
#endif
/* Other flags. */
#define MAP_FIXED 0x0010 /* Map address must be exactly as requested. */
#ifdef __USE_MISC
#define MAP_RENAME 0x0020 /* Sun: rename private pages to file */
#define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */
#define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
#define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
# define MAP_HASSEMPHORE 0x0200 /* Region may contain semaphores. */
# define MAP_STACK 0x0400 /* Region grows down, like a stack. */
# define MAP_NOSYNC 0x0800 /* Try to avoid flushing to the disk. */
# define MAP_NOCORE 0x20000 /* Don't include these pages in a core dump. */
#endif
/* Advice to `madvise'. */
#ifdef __USE_MISC
# define MADV_NORMAL 0 /* No further special treatment. */
# define MADV_RANDOM 1 /* Expect random page references. */
# define MADV_SEQUENTIAL 2 /* Expect sequential page references. */
# define MADV_WILLNEED 3 /* Will need these pages. */
# define MADV_DONTNEED 4 /* Don't need these pages. */
# define MADV_FREE 5 /* Don't need these pages, they contain junk. */
# define MADV_NOSYNC 6 /* Try to avoid flushing to the disk. */
# define MADV_AUTOSYNC 7 /* Use the default flushing strategy. */
# define MADV_NOCORE 8 /* Don't include these pages in a core dump. */
# define MADV_CORE 9 /* Include pages in a core dump (default). */
# define MADV_PROTECT 10 /* protect process from pageout kill */
#endif
/* The POSIX people had to invent similar names for the same things. */
#ifdef __USE_XOPEN2K
# define POSIX_MADV_NORMAL 0 /* No further special treatment. */
# define POSIX_MADV_RANDOM 1 /* Expect random page references. */
# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */
# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */
# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */
#endif
/* Flags to `msync'. */
#define MS_ASYNC 1 /* Sync memory asynchronously. */
#define MS_SYNC 0 /* Synchronous memory sync. */
#define MS_INVALIDATE 2 /* Invalidate the caches. */
/* Flags for `mlockall' (can be OR'd together). */
#define MCL_CURRENT 1 /* Lock all currently mapped pages. */
#define MCL_FUTURE 2 /* Lock all additions to address
space. */
/* Flags for 'minherit'. */
#ifdef __USE_MISC
# define INHERIT_SHARE 0
# define INHERIT_COPY 1
# define INHERIT_NONE 2
#endif
/*
* Return bits from mincore
*/
#ifdef __USE_MISC
#define MINCORE_INCORE 0x1 /* Page is incore */
#define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */
#define MINCORE_MODIFIED 0x4 /* Page has been modified by us */
#define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
#define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */
#endif /* Use MISC */
#ifdef __USE_MISC
__BEGIN_DECLS
extern int minherit (void *__addr, size_t __len, int __inherit);
__END_DECLS
#endif /* Use BSD */
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