The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)mman.h      8.2 (Berkeley) 1/9/95
   34  * $FreeBSD: releng/5.1/sys/sys/mman.h 112881 2003-03-31 21:09:57Z wes $
   35  */
   36 
   37 #ifndef _SYS_MMAN_H_
   38 #define _SYS_MMAN_H_
   39 
   40 #include <sys/cdefs.h>
   41 #include <sys/_types.h>
   42 
   43 #if __BSD_VISIBLE
   44 /*
   45  * Inheritance for minherit()
   46  */
   47 #define INHERIT_SHARE   0
   48 #define INHERIT_COPY    1
   49 #define INHERIT_NONE    2
   50 #endif
   51 
   52 /*
   53  * Protections are chosen from these bits, or-ed together
   54  */
   55 #define PROT_NONE       0x00    /* no permissions */
   56 #define PROT_READ       0x01    /* pages can be read */
   57 #define PROT_WRITE      0x02    /* pages can be written */
   58 #define PROT_EXEC       0x04    /* pages can be executed */
   59 
   60 /*
   61  * Flags contain sharing type and options.
   62  * Sharing types; choose one.
   63  */
   64 #define MAP_SHARED      0x0001          /* share changes */
   65 #define MAP_PRIVATE     0x0002          /* changes are private */
   66 #define MAP_COPY        MAP_PRIVATE     /* Obsolete */
   67 
   68 #if __BSD_VISIBLE
   69 /*
   70  * Other flags
   71  */
   72 #define MAP_FIXED        0x0010 /* map addr must be exactly as requested */
   73 #define MAP_RENAME       0x0020 /* Sun: rename private pages to file */
   74 #define MAP_NORESERVE    0x0040 /* Sun: don't reserve needed swap area */
   75 #define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
   76 #define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
   77 #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
   78 #define MAP_STACK        0x0400 /* region grows down, like a stack */
   79 #define MAP_NOSYNC       0x0800 /* page to but do not sync underlying file */
   80 
   81 /*
   82  * Mapping type
   83  */
   84 #define MAP_FILE         0x0000 /* map from file (default) */
   85 #define MAP_ANON         0x1000 /* allocated from memory, swap space */
   86 
   87 /*
   88  * Extended flags
   89  */
   90 #define MAP_NOCORE       0x00020000 /* dont include these pages in a coredump */
   91 #endif /* __BSD_VISIBLE */
   92 
   93 #if __POSIX_VISIBLE >= 199309
   94 /*
   95  * Process memory locking
   96  */
   97 #define MCL_CURRENT     0x0001  /* Lock only current memory */
   98 #define MCL_FUTURE      0x0002  /* Lock all future memory as well */
   99 #endif
  100 
  101 /*
  102  * Error return from mmap()
  103  */
  104 #define MAP_FAILED      ((void *)-1)
  105 
  106 /*
  107  * msync() flags
  108  */
  109 #define MS_SYNC         0x0000  /* msync synchronously */
  110 #define MS_ASYNC        0x0001  /* return immediately */
  111 #define MS_INVALIDATE   0x0002  /* invalidate all cached data */
  112 
  113 #if __BSD_VISIBLE
  114 /*
  115  * Advice to madvise
  116  */
  117 #define MADV_NORMAL     0       /* no further special treatment */
  118 #define MADV_RANDOM     1       /* expect random page references */
  119 #define MADV_SEQUENTIAL 2       /* expect sequential page references */
  120 #define MADV_WILLNEED   3       /* will need these pages */
  121 #define MADV_DONTNEED   4       /* dont need these pages */
  122 #define MADV_FREE       5       /* dont need these pages, and junk contents */
  123 #define MADV_NOSYNC     6       /* try to avoid flushes to physical media */
  124 #define MADV_AUTOSYNC   7       /* revert to default flushing strategy */
  125 #define MADV_NOCORE     8       /* do not include these pages in a core file */
  126 #define MADV_CORE       9       /* revert to including pages in a core file */
  127 #define MADV_PROTECT    10      /* protect process from pageout kill */
  128 
  129 /*
  130  * Return bits from mincore
  131  */
  132 #define MINCORE_INCORE           0x1 /* Page is incore */
  133 #define MINCORE_REFERENCED       0x2 /* Page has been referenced by us */
  134 #define MINCORE_MODIFIED         0x4 /* Page has been modified by us */
  135 #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
  136 #define MINCORE_MODIFIED_OTHER  0x10 /* Page has been modified */
  137 #endif /* __BSD_VISIBLE */
  138 
  139 /*
  140  * XXX missing POSIX_MADV_* macros, POSIX_TYPED_MEM_* macros, and
  141  * posix_typed_mem_info structure.
  142  */
  143 
  144 #ifndef _MODE_T_DECLARED
  145 typedef __mode_t        mode_t;
  146 #define _MODE_T_DECLARED
  147 #endif
  148 
  149 #ifndef _OFF_T_DECLARED
  150 typedef __off_t         off_t;
  151 #define _OFF_T_DECLARED
  152 #endif
  153 
  154 #ifndef _SIZE_T_DECLARED
  155 typedef __size_t        size_t;
  156 #define _SIZE_T_DECLARED
  157 #endif
  158 
  159 #ifndef _KERNEL
  160 
  161 __BEGIN_DECLS
  162 /*
  163  * XXX not yet implemented: mlockall(), munlockall(), posix_madvise(),
  164  * posix_mem_offset(), posix_typed_mem_get_info(), posix_typed_mem_open().
  165  */
  166 #if __BSD_VISIBLE
  167 int     madvise(void *, size_t, int);
  168 int     mincore(const void *, size_t, char *);
  169 int     minherit(void *, size_t, int);
  170 #endif
  171 int     mlock(const void *, size_t);
  172 #ifndef _MMAP_DECLARED
  173 #define _MMAP_DECLARED
  174 void *  mmap(void *, size_t, int, int, int, off_t);
  175 #endif
  176 int     mprotect(const void *, size_t, int);
  177 int     msync(void *, size_t, int);
  178 int     munlock(const void *, size_t);
  179 int     munmap(void *, size_t);
  180 #if __POSIX_VISIBLE >= 199309
  181 int     shm_open(const char *, int, mode_t);
  182 int     shm_unlink(const char *);
  183 #endif
  184 __END_DECLS
  185 
  186 #endif /* !_KERNEL */
  187 
  188 #endif /* !_SYS_MMAN_H_ */

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