/* Definitions for POSIX memory map interface.  Linux/x86_64 version.
   Copyright (C) 2001, 2003, 2005, 2006, 2009 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        0x10                /* Interpret addr exactly.  */
#ifdef __USE_MISC
# define MAP_FILE        0
# define MAP_ANONYMOUS        0x20                /* Don't use a file.  */
# define MAP_ANON        MAP_ANONYMOUS
# define MAP_32BIT        0x40                /* Only give out 32-bit addresses.  */
#endif

/* These are Linux-specific.  */
#ifdef __USE_MISC
# define MAP_GROWSDOWN        0x00100                /* Stack-like segment.  */
# define MAP_DENYWRITE        0x00800                /* ETXTBSY */
# define MAP_EXECUTABLE        0x01000                /* Mark it as an executable.  */
# define MAP_LOCKED        0x02000                /* Lock the mapping.  */
# define MAP_NORESERVE        0x04000                /* Don't check for reservations.  */
# define MAP_POPULATE        0x08000                /* Populate (prefault) pagetables.  */
# define MAP_NONBLOCK        0x10000                /* Do not block on IO.  */
# define MAP_STACK        0x20000                /* Allocation is for a stack.  */
#endif

/* Flags to `msync'.  */
#define MS_ASYNC        1                /* Sync memory asynchronously.  */
#define MS_SYNC                4                /* Synchronous memory sync.  */
#define MS_INVALIDATE        2                /* Invalidate the caches.  */

/* Flags for `mlockall'.  */
#define MCL_CURRENT        1                /* Lock all currently mapped pages.  */
#define MCL_FUTURE        2                /* 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          4        /* Don't need these pages.  */
# define MADV_REMOVE          9        /* Remove these pages and resources.  */
# define MADV_DONTFORK          10        /* Do not inherit across fork.  */
# define MADV_DOFORK          11        /* Do inherit across fork.  */
# define MADV_MERGEABLE          12        /* KSM may merge identical pages.  */
# define MADV_UNMERGEABLE 13        /* KSM may not merge identical pages.  */
# define MADV_HWPOISON          100        /* Poison a page for testing.  */
#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