source: svn/trunk/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/bits/mman.h @ 2

/* Definitions for POSIX memory map interface.  Linux/MIPS version.
   Copyright (C) 1997, 2000 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.  */

/* 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       0x00
# define MAP_ANONYMOUS  0x0800          /* Don't use a file.  */
# define MAP_ANON       MAP_ANONYMOUS
# define MAP_RENAME     MAP_ANONYMOUS
#endif

/* These are Linux-specific.  */
#ifdef __USE_MISC
# define MAP_NORESERVE  0x0400          /* don't check for reservations */
# define MAP_ANONYMOUS  0x0800          /* don't use a file */
# define MAP_GROWSDOWN  0x1000          /* stack-like segment */
# define MAP_DENYWRITE  0x2000          /* ETXTBSY */
# define MAP_EXECUTABLE 0x4000          /* mark it as an executable */
# define MAP_LOCKED     0x8000          /* pages are locked */
#endif

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

/* Flags for `mlockall'.  */
#define MCL_CURRENT     1               /* Lock all currently mapped pages.  */
#define MCL_FUTURE      2               /* Lock all additions to address
                                           space.  */

/* Advice to `madvise'.  */
#ifdef __USE_BSD
#define MADV_NORMAL     0               /* default page-in behavior */
#define MADV_RANDOM     1               /* page-in minimum required */
#define MADV_SEQUENTIAL 2               /* read-ahead aggressively */
#define MADV_WILLNEED   3               /* pre-fault pages */
#define MADV_DONTNEED   4               /* discard these pages */
#endif

/* Flags for `mremap'.  */
#ifdef __USE_GNU
# define MREMAP_MAYMOVE 1
#endif