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  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)mman.h      8.2 (Berkeley) 1/9/95
   30  * $FreeBSD: src/sys/sys/mman.h,v 1.39 2004/04/27 13:13:20 mux Exp $
   31  */
   32 
   33 #ifndef _SYS_MMAN_H_
   34 #define _SYS_MMAN_H_
   35 
   36 #include <sys/cdefs.h>
   37 #include <sys/_types.h>
   38 
   39 #if __BSD_VISIBLE
   40 /*
   41  * Inheritance for minherit()
   42  */
   43 #define INHERIT_SHARE   0
   44 #define INHERIT_COPY    1
   45 #define INHERIT_NONE    2
   46 #endif
   47 
   48 /*
   49  * Protections are chosen from these bits, or-ed together
   50  */
   51 #define PROT_NONE       0x00    /* no permissions */
   52 #define PROT_READ       0x01    /* pages can be read */
   53 #define PROT_WRITE      0x02    /* pages can be written */
   54 #define PROT_EXEC       0x04    /* pages can be executed */
   55 
   56 /*
   57  * Flags contain sharing type and options.
   58  * Sharing types; choose one.
   59  */
   60 #define MAP_SHARED      0x0001          /* share changes */
   61 #define MAP_PRIVATE     0x0002          /* changes are private */
   62 #define MAP_COPY        MAP_PRIVATE     /* Obsolete */
   63 
   64 #if __BSD_VISIBLE
   65 /*
   66  * Other flags
   67  */
   68 #define MAP_FIXED        0x0010 /* map addr must be exactly as requested */
   69 #define MAP_RENAME       0x0020 /* Sun: rename private pages to file */
   70 #define MAP_NORESERVE    0x0040 /* Sun: don't reserve needed swap area */
   71 #define MAP_RESERVED0080 0x0080 /* previously misimplemented MAP_INHERIT */
   72 #define MAP_RESERVED0100 0x0100 /* previously unimplemented MAP_NOEXTEND */
   73 #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
   74 #define MAP_STACK        0x0400 /* region grows down, like a stack */
   75 #define MAP_NOSYNC       0x0800 /* page to but do not sync underlying file */
   76 
   77 /*
   78  * Mapping type
   79  */
   80 #define MAP_FILE         0x0000 /* map from file (default) */
   81 #define MAP_ANON         0x1000 /* allocated from memory, swap space */
   82 
   83 /*
   84  * Extended flags
   85  */
   86 #define MAP_NOCORE       0x00020000 /* dont include these pages in a coredump */
   87 #endif /* __BSD_VISIBLE */
   88 
   89 #if __POSIX_VISIBLE >= 199309
   90 /*
   91  * Process memory locking
   92  */
   93 #define MCL_CURRENT     0x0001  /* Lock only current memory */
   94 #define MCL_FUTURE      0x0002  /* Lock all future memory as well */
   95 #endif
   96 
   97 /*
   98  * Error return from mmap()
   99  */
  100 #define MAP_FAILED      ((void *)-1)
  101 
  102 /*
  103  * msync() flags
  104  */
  105 #define MS_SYNC         0x0000  /* msync synchronously */
  106 #define MS_ASYNC        0x0001  /* return immediately */
  107 #define MS_INVALIDATE   0x0002  /* invalidate all cached data */
  108 
  109 #if __BSD_VISIBLE
  110 /*
  111  * Advice to madvise
  112  */
  113 #define MADV_NORMAL     0       /* no further special treatment */
  114 #define MADV_RANDOM     1       /* expect random page references */
  115 #define MADV_SEQUENTIAL 2       /* expect sequential page references */
  116 #define MADV_WILLNEED   3       /* will need these pages */
  117 #define MADV_DONTNEED   4       /* dont need these pages */
  118 #define MADV_FREE       5       /* dont need these pages, and junk contents */
  119 #define MADV_NOSYNC     6       /* try to avoid flushes to physical media */
  120 #define MADV_AUTOSYNC   7       /* revert to default flushing strategy */
  121 #define MADV_NOCORE     8       /* do not include these pages in a core file */
  122 #define MADV_CORE       9       /* revert to including pages in a core file */
  123 #define MADV_PROTECT    10      /* protect process from pageout kill */
  124 
  125 /*
  126  * Return bits from mincore
  127  */
  128 #define MINCORE_INCORE           0x1 /* Page is incore */
  129 #define MINCORE_REFERENCED       0x2 /* Page has been referenced by us */
  130 #define MINCORE_MODIFIED         0x4 /* Page has been modified by us */
  131 #define MINCORE_REFERENCED_OTHER 0x8 /* Page has been referenced */
  132 #define MINCORE_MODIFIED_OTHER  0x10 /* Page has been modified */
  133 #endif /* __BSD_VISIBLE */
  134 
  135 /*
  136  * XXX missing POSIX_TYPED_MEM_* macros and
  137  * posix_typed_mem_info structure.
  138  */
  139 #if __POSIX_VISIBLE >= 200112
  140 #define POSIX_MADV_NORMAL       MADV_NORMAL
  141 #define POSIX_MADV_RANDOM       MADV_RANDOM
  142 #define POSIX_MADV_SEQUENTIAL   MADV_SEQUENTIAL
  143 #define POSIX_MADV_WILLNEED     MADV_WILLNEED
  144 #define POSIX_MADV_DONTNEED     MADV_DONTNEED
  145 #endif
  146 
  147 #ifndef _MODE_T_DECLARED
  148 typedef __mode_t        mode_t;
  149 #define _MODE_T_DECLARED
  150 #endif
  151 
  152 #ifndef _OFF_T_DECLARED
  153 typedef __off_t         off_t;
  154 #define _OFF_T_DECLARED
  155 #endif
  156 
  157 #ifndef _SIZE_T_DECLARED
  158 typedef __size_t        size_t;
  159 #define _SIZE_T_DECLARED
  160 #endif
  161 
  162 #ifndef _KERNEL
  163 
  164 __BEGIN_DECLS
  165 /*
  166  * XXX not yet implemented: posix_mem_offset(), posix_typed_mem_get_info(),
  167  * posix_typed_mem_open().
  168  */
  169 #if __BSD_VISIBLE
  170 int     madvise(void *, size_t, int);
  171 int     mincore(const void *, size_t, char *);
  172 int     minherit(void *, size_t, int);
  173 #endif
  174 int     mlock(const void *, size_t);
  175 #ifndef _MMAP_DECLARED
  176 #define _MMAP_DECLARED
  177 void *  mmap(void *, size_t, int, int, int, off_t);
  178 #endif
  179 int     mprotect(const void *, size_t, int);
  180 int     msync(void *, size_t, int);
  181 int     munlock(const void *, size_t);
  182 int     munmap(void *, size_t);
  183 #if __POSIX_VISIBLE >= 200112
  184 int     posix_madvise(void *, size_t, int);
  185 #endif
  186 #if __POSIX_VISIBLE >= 199309
  187 int     mlockall(int);
  188 int     munlockall(void);
  189 int     shm_open(const char *, int, mode_t);
  190 int     shm_unlink(const char *);
  191 #endif
  192 __END_DECLS
  193 
  194 #endif /* !_KERNEL */
  195 
  196 #endif /* !_SYS_MMAN_H_ */

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