FreeBSD/Linux Kernel Cross Reference
sys/sys/mman.h

     /*-
      * Copyright (c) 1982, 1986, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)mman.h      8.2 (Berkeley) 1/9/95
     * $FreeBSD$
     */
    
    #ifndef _SYS_MMAN_H_
    #define _SYS_MMAN_H_
    
    #include <sys/_posix.h>
    
    /*
     * Protections are chosen from these bits, or-ed together
     */
    #define PROT_NONE       0x00    /* no permissions */
    #define PROT_READ       0x01    /* pages can be read */
    #define PROT_WRITE      0x02    /* pages can be written */
    #define PROT_EXEC       0x04    /* pages can be executed */
    
    /*
     * Flags contain sharing type and options.
     * Sharing types; choose one.
     */
    #define MAP_SHARED      0x0001          /* share changes */
    #define MAP_PRIVATE     0x0002          /* changes are private */
    #define MAP_COPY        MAP_PRIVATE     /* Obsolete */
    
    /*
     * Other flags
     */
    #define MAP_FIXED        0x0010 /* map addr must be exactly as requested */
    #define MAP_RENAME       0x0020 /* Sun: rename private pages to file */
    #define MAP_NORESERVE    0x0040 /* Sun: don't reserve needed swap area */
    #define MAP_INHERIT      0x0080 /* region is retained after exec */
    #define MAP_NOEXTEND     0x0100 /* for MAP_FILE, don't change file size */
    #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
    #define MAP_STACK        0x0400 /* region grows down, like a stack */
    
    #ifdef _P1003_1B_VISIBLE
    /*
     * Process memory locking
     */
    #define MCL_CURRENT     0x0001  /* Lock only current memory */
    #define MCL_FUTURE      0x0002  /* Lock all future memory as well */
    
    #endif /* _P1003_1B_VISIBLE */
    
    /*
     * Error return from mmap()
     */
    #define MAP_FAILED      ((void *)-1)
    
    /*
     * msync() flags
     */
    #define MS_SYNC         0x0000  /* msync synchronously */
    #define MS_ASYNC        0x0001  /* return immediately */
    #define MS_INVALIDATE   0x0002  /* invalidate all cached data */
    
    
    /*
     * Mapping type
     */
    #define MAP_FILE        0x0000  /* map from file (default) */
    #define MAP_ANON        0x1000  /* allocated from memory, swap space */
    
    /*
     * Advice to madvise
     */
   #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       /* dont need these pages */
   #define MADV_FREE       5       /* dont need these pages, and junk contents */
   
   /*
    * Return bits from mincore
    */
   #define MINCORE_INCORE           0x1 /* Page is incore */
   #define MINCORE_REFERENCED       0x2 /* Page has been referenced by us */
   #define MINCORE_MODIFIED         0x4 /* Page has been modified by us */
   #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
   #define MINCORE_MODIFIED_OTHER  0x10 /* Page has been modified */
   
   #ifndef KERNEL
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   #ifdef _P1003_1B_VISIBLE
   int     mlockall __P((int));
   int     munlockall __P((void));
   int     shm_open __P((const char *, int, mode_t));
   int     shm_unlink __P((const char *));
   #endif /* _P1003_1B_VISIBLE */
   int     mlock __P((const void *, size_t));
   #ifndef _MMAP_DECLARED
   #define _MMAP_DECLARED
   void *  mmap __P((void *, size_t, int, int, int, off_t));
   #endif
   int     mprotect __P((const void *, size_t, int));
   int     msync __P((void *, size_t, int));
   int     munlock __P((const void *, size_t));
   int     munmap __P((void *, size_t));
   #ifndef _POSIX_SOURCE
   int     madvise __P((void *, size_t, int));
   int     mincore __P((const void *, size_t, char *));
   int     minherit __P((void *, size_t, int));
   #endif
   __END_DECLS
   
   #endif /* !KERNEL */
   
   #endif

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