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- /* Definitions for POSIX memory map interface. Linux/PowerPC 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; iclude <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 0x001 /* Share changes. */
- #define MAP_PRIVATE 0x002 /* Changes are private. */
- #ifdef __USE_MISC
- # define MAP_TYPE 0x00f /* Mask for type of mapping. */
- #endif
- /* Other flags. */
- #define MAP_FIXED 0x010 /* Interpret addr exactly. */
- #ifdef __USE_MISC
- # define MAP_FILE 0x000
- # define MAP_ANONYMOUS 0x020 /* Don't use a file. */
- # define MAP_ANON MAP_ANONYMOUS
- #endif
- /* These are Linux-specific. */
- #ifdef __USE_MISC
- # define MAP_GROWSDOWN 0x0100 /* Stack-like segment. */
- # define MAP_DENYWRITE 0x0800 /* ETXTBSY */
- # define MAP_EXECUTABLE 0x1000 /* Mark it as an executable. */
- # define MAP_LOCKED 0x0080 /* Lock the mapping. */
- # define MAP_NORESERVE 0x0040 /* Don't check for reservations. */
- #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 0x2000 /* Lock all currently mapped pages. */
- #define MCL_FUTURE 0x4000 /* Lock all additions to address
- space. */
- /* Flags for `mremap'. */
- #ifdef __USE_GNU
- # define MREMAP_MAYMOVE 1
- #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. */
- #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
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