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SunOS4 system dependent bits of sys/mman.h.

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Ulrich Drepper 1998-09-23 16:35:43 +00:00
parent 9a84961b89
commit 68ba15f9a3
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sysdeps/unix/bsd/sun/sunos4/bits/mman.h Normal file
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/* Definitions for BSD-style memory management. SunOS 4 version.
Copyright (C) 1994, 1995, 1996, 1997, 1998 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _BITS_MMAN_H
#define _BITS_MMAN_H 1
/* 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. */
/* Sharing types (must choose one and only one of these). */
#define MAP_SHARED 0x01 /* Share changes. */
#define MAP_PRIVATE 0x02 /* Changes private; copy pages on write. */
#ifdef __USE_BSD
# define MAP_TYPE 0x0f /* Mask for sharing type. */
#endif
/* Other flags. */
#define MAP_FIXED 0x10 /* Map address must be exactly as requested. */
/* The following three flags are not actually implemented in SunOS 4.1. */
#ifdef __USE_BSD
# define MAP_RENAME 0x20 /* Rename private pages to file. */
# define MAP_NORESERVE 0x40 /* Don't reserve needed swap area. */
# define MAP_INHERIT 0x80 /* Region is retained after exec. */
#endif
/* This is an internal flag that is always set in `mmap' system calls. In
older versions of SunOS 4 `mmap' did not return the actual mapping
address, but always returned zero. This flag says to return the
address; the `mmap' C library function always sets it. */
#define _MAP_NEW 0x80000000
/* 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
/* Flags to `msync'. */
#define MS_ASYNC 0x1 /* Return immediately, don't fsync. */
#define MS_INVALIDATE 0x2 /* Invalidate caches. */
#endif /* bits/mman.h */