0a47b48b9f
about the contents anymore. This gives us alot of the advantage of freeing individual pages through munmap, but with almost none of the overhead.
116 lines
4.3 KiB
C
116 lines
4.3 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)mman.h 8.2 (Berkeley) 1/9/95
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* $Id: mman.h,v 1.13 1996/05/19 07:36:41 dyson Exp $
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*/
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#ifndef _SYS_MMAN_H_
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#define _SYS_MMAN_H_
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/*
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* Protections are chosen from these bits, or-ed together
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*/
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#define PROT_NONE 0x00 /* no permissions */
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#define PROT_READ 0x01 /* pages can be read */
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#define PROT_WRITE 0x02 /* pages can be written */
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#define PROT_EXEC 0x04 /* pages can be executed */
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/*
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* Flags contain sharing type and options.
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* Sharing types; choose one.
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*/
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#define MAP_SHARED 0x0001 /* share changes */
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#define MAP_PRIVATE 0x0002 /* changes are private */
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#define MAP_COPY MAP_PRIVATE /* Obsolete */
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/*
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* Other flags
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*/
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#define MAP_FIXED 0x0010 /* map addr must be exactly as requested */
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#define MAP_RENAME 0x0020 /* Sun: rename private pages to file */
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#define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */
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#define MAP_INHERIT 0x0080 /* region is retained after exec */
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#define MAP_NOEXTEND 0x0100 /* for MAP_FILE, don't change file size */
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#define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
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/*
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* msync() flags
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*/
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#define MS_ASYNC 0x0001 /* return immediately */
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#define MS_INVALIDATE 0x0002 /* invalidate all cached data */
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/*
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* Mapping type
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*/
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#define MAP_FILE 0x0000 /* map from file (default) */
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#define MAP_ANON 0x1000 /* allocated from memory, swap space */
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/*
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* Advice to madvise
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*/
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#define MADV_NORMAL 0 /* no further special treatment */
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#define MADV_RANDOM 1 /* expect random page references */
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#define MADV_SEQUENTIAL 2 /* expect sequential page references */
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#define MADV_WILLNEED 3 /* will need these pages */
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#define MADV_DONTNEED 4 /* dont need these pages */
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#define MADV_FREE 5 /* dont need these pages, and junk contents */
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/*
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* Return bits from mincore
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*/
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#define MINCORE_INCORE 0x1 /* Page is incore */
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#define MINCORE_REFERENCED 0x2 /* Page has been referenced by us */
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#define MINCORE_MODIFIED 0x4 /* Page has been modified by us */
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#define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
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#define MINCORE_MODIFIED_OTHER 0x10 /* Page has been modified */
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#ifndef KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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caddr_t mmap __P((caddr_t, size_t, int, int, int, off_t));
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int mprotect __P((caddr_t, size_t, int));
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int munmap __P((caddr_t, size_t));
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int msync __P((caddr_t, size_t, int));
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int mlock __P((caddr_t, size_t));
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int munlock __P((caddr_t, size_t));
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int madvise __P((caddr_t, size_t, int));
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int mincore __P((caddr_t, size_t, char *));
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int minherit __P((caddr_t, size_t, int));
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__END_DECLS
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#endif /* !KERNEL */
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#endif
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