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

     /*      $NetBSD: mman.h,v 1.41.10.1 2009/02/02 19:44:33 snj Exp $       */
     
     /*-
      * 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. 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
     */
    
    #ifndef _SYS_MMAN_H_
    #define _SYS_MMAN_H_
    
    #include <sys/featuretest.h>
    
    #include <machine/ansi.h>
    
    #ifdef  _BSD_SIZE_T_
    typedef _BSD_SIZE_T_    size_t;
    #undef  _BSD_SIZE_T_
    #endif
    
    #include <sys/ansi.h>
    
    #ifndef mode_t
    typedef __mode_t        mode_t;
    #define mode_t          __mode_t
    #endif
    
    #ifndef off_t
    typedef __off_t         off_t;          /* file offset */
    #define off_t           __off_t
    #endif
    
    
    /*
     * 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 */
    
    #ifdef _KERNEL
    /*
     * Deprecated flag; these are treated as MAP_PRIVATE internally by
     * the kernel.
     */
    #define MAP_COPY        0x0004  /* "copy" region at mmap time */
    #endif
    
    /*
     * 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_HASSEMAPHORE 0x0200 /* region may contain semaphores */
    #define MAP_TRYFIXED     0x0400 /* attempt hint address, even within break */
    #define MAP_WIRED        0x0800 /* mlock() mapping when it is established */
    
    /*
     * Mapping type
     */
    #define MAP_FILE        0x0000  /* map from file (default) */
    #define MAP_ANON        0x1000  /* allocated from memory, swap space */
    #define MAP_STACK       0x2000  /* allocated from memory, swap space (stack) */
    
   /*
    * Alignment (expressed in log2).  Must be >= log2(PAGE_SIZE) and
    * < # bits in a pointer (26 (acorn26), 32 or 64).
    */
   #define MAP_ALIGNED(n)          ((n) << MAP_ALIGNMENT_SHIFT)
   #define MAP_ALIGNMENT_SHIFT     24
   #define MAP_ALIGNMENT_MASK      MAP_ALIGNED(0xff)
   #define MAP_ALIGNMENT_64KB      MAP_ALIGNED(16) /* 2^16 */
   #define MAP_ALIGNMENT_16MB      MAP_ALIGNED(24) /* 2^24 */
   #define MAP_ALIGNMENT_4GB       MAP_ALIGNED(32) /* 2^32 */
   #define MAP_ALIGNMENT_1TB       MAP_ALIGNED(40) /* 2^40 */
   #define MAP_ALIGNMENT_256TB     MAP_ALIGNED(48) /* 2^48 */
   #define MAP_ALIGNMENT_64PB      MAP_ALIGNED(56) /* 2^56 */
   
   /*
    * Error indicator returned by mmap(2)
    */
   #define MAP_FAILED      ((void *) -1)   /* mmap() failed */
   
   /*
    * Flags to msync
    */
   #define MS_ASYNC        0x01    /* perform asynchronous writes */
   #define MS_INVALIDATE   0x02    /* invalidate cached data */
   #define MS_SYNC         0x04    /* perform synchronous writes */
   
   /*
    * Flags to mlockall
    */
   #define MCL_CURRENT     0x01    /* lock all pages currently mapped */
   #define MCL_FUTURE      0x02    /* lock all pages mapped in the future */
   
   /*
    * POSIX memory avissory values.
    * Note: keep consistent with the original defintions below.
    */
   #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 */
   
   #if defined(_NETBSD_SOURCE)
   /*
    * Original advice values, equivalent to POSIX defintions,
    * and few implementation-specific ones.
    */
   #define MADV_NORMAL             POSIX_MADV_NORMAL
   #define MADV_RANDOM             POSIX_MADV_RANDOM
   #define MADV_SEQUENTIAL         POSIX_MADV_SEQUENTIAL
   #define MADV_WILLNEED           POSIX_MADV_WILLNEED
   #define MADV_DONTNEED           POSIX_MADV_DONTNEED
   #define MADV_SPACEAVAIL         5       /* Insure that resources are reserved */
   #define MADV_FREE               6       /* Pages are empty, free them */
   
   /*
    * Flags to minherit
    */
   #define MAP_INHERIT_SHARE       0       /* share with child */
   #define MAP_INHERIT_COPY        1       /* copy into child */
   #define MAP_INHERIT_NONE        2       /* absent from child */
   #define MAP_INHERIT_DONATE_COPY 3       /* copy and delete -- not
                                              implemented in UVM */
   #define MAP_INHERIT_DEFAULT     MAP_INHERIT_COPY
   #endif
   
   #ifndef _KERNEL
   
   #include <sys/cdefs.h>
   
   __BEGIN_DECLS
   void *  mmap(void *, size_t, int, int, int, off_t);
   int     munmap(void *, size_t);
   int     mprotect(void *, size_t, int);
   #ifndef __LIBC12_SOURCE__
   int     msync(void *, size_t, int) __RENAME(__msync13);
   #endif
   int     mlock(const void *, size_t);
   int     munlock(const void *, size_t);
   int     mlockall(int);
   int     munlockall(void);
   #if defined(_NETBSD_SOURCE)
   int     madvise(void *, size_t, int);
   int     mincore(void *, size_t, char *);
   int     minherit(void *, size_t, int);
   void *  mremap(void *, size_t, void *, size_t, int);
   #endif
   int     posix_madvise(void *, size_t, int);
   __END_DECLS
   
   #endif /* !_KERNEL */
   
   #endif /* !_SYS_MMAN_H_ */

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