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/* Definitions for POSIX memory map interface. Linux/Alpha version.
Copyright (C) 1997, 1998, 2000, 2003 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
/* The following definitions basically come from the kernel headers.
But the kernel header is not namespace clean. */
/* 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_READ 0x1 /* Page can be read. */
#define PROT_WRITE 0x2 /* Page can be written. */
#define PROT_EXEC 0x4 /* Page can be executed. */
#define PROT_NONE 0x0 /* Page can not be accessed. */
#define PROT_GROWSDOWN 0x01000000 /* Extend change to start of
growsdown vma (mprotect only). */
#define PROT_GROWSUP 0x02000000 /* Extend change to start of
growsup vma (mprotect only). */
/* Sharing types (must choose one and only one of these). */
#define MAP_SHARED 0x01 /* Share changes. */
#define MAP_PRIVATE 0x02 /* Changes are private. */
#ifdef __USE_MISC
# define MAP_TYPE 0x0f /* Mask for type of mapping. */
#endif
/* Other flags. */
#define MAP_FIXED 0x100 /* Interpret addr exactly. */
#ifdef __USE_MISC
# define MAP_FILE 0
# define MAP_ANONYMOUS 0x10 /* Don't use a file. */
# define MAP_ANON MAP_ANONYMOUS
#endif
/* Not used by Linux, but here to make sure we don't clash with
OSF/1 defines. */
#if 0 && defined __USE_BSD
# define MAP_HASSEMAPHORE 0x0200
# define MAP_INHERIT 0x0400
# define MAP_UNALIGNED 0x0800
#endif
/* These are Linux-specific. */
#ifdef __USE_MISC
# define MAP_GROWSDOWN 0x01000 /* Stack-like segment. */
# define MAP_DENYWRITE 0x02000 /* ETXTBSY */
# define MAP_EXECUTABLE 0x04000 /* Mark it as an executable. */
# define MAP_LOCKED 0x08000 /* Lock the mapping. */
# define MAP_NORESERVE 0x10000 /* Don't check for reservations. */
# define MAP_POPULATE 0x20000 /* Populate (prefault) pagetables. */
# define MAP_NONBLOCK 0x40000 /* Do not block on IO. */
#endif
/* Flags to `msync'. */
#define MS_ASYNC 1 /* Sync memory asynchronously. */
#define MS_SYNC 2 /* Synchronous memory sync. */
#define MS_INVALIDATE 4 /* Invalidate the caches. */
/* Flags for `mlockall'. */
#define MCL_CURRENT 8192 /* Lock all currently mapped pages. */
#define MCL_FUTURE 16384 /* Lock all additions to address
space. */
/* Flags for `mremap'. */
#ifdef __USE_GNU
# define MREMAP_MAYMOVE 1
# define MREMAP_FIXED 2
#endif
/* Advice to `madvise'. */
#ifdef __USE_BSD
# 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 6 /* Don't need these pages. */
#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 6 /* Don't need these pages. */
#endif
/* Not used by Linux, but here to make sure we don't clash with
OSF/1 defines. */
#if 0 && defined __USE_BSD
# define MADV_DONTNEED_COMPAT 4 /* Old version? */
# define MADV_SPACEAVAIL 5 /* Ensure resources are available. */
#endif
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