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

     /*      $NetBSD: mman.h,v 1.62 2019/12/06 19:37:43 christos 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 */
    
    #ifdef _NETBSD_SOURCE
    /*
     * PAX mprotect prohibits setting protection bits
     * missing from the original mmap call unless explicitly
     * requested with PROT_MPROTECT.
     */
    #define        PROT_MPROTECT(x)                ((x) << 3)
    #define        PROT_MPROTECT_EXTRACT(x)        (((x) >> 3) & 0x7)
    #endif
    
    /*
     * Flags contain sharing type and options.
     * Sharing types; choose one.
     */
    #define MAP_SHARED      0x0001  /* share changes */
    #define MAP_PRIVATE     0x0002  /* changes are private */
            /* old MAP_COPY 0x0004     "copy" region at mmap time */
    
    /*
     * Other flags
     */
    #define MAP_REMAPDUP     0x0004 /* mremap only: duplicate the mapping */
    #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_ANONYMOUS   0x1000  /* allocated from memory, swap space */
   #define MAP_ANON        MAP_ANONYMOUS
   #define MAP_STACK       0x2000  /* allocated from memory, swap space (stack) */
   
   /*
    * Alignment (expressed in log2).  Must be >= log2(PAGE_SIZE) and
    * < # bits in a pointer (32 or 64).
    */
   #define MAP_ALIGNED(n)  ((int)((unsigned int)(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 */
   
   #ifdef _NETBSD_SOURCE
   #define MAP_FMT "\177\020"                      \
           "b\0"  "SHARED\0"                       \
           "b\1"  "PRIVATE\0"                      \
           "b\2"  "COPY\0"                         \
           "b\4"  "FIXED\0"                        \
           "b\5"  "RENAME\0"                       \
           "b\6"  "NORESERVE\0"                    \
           "b\7"  "INHERIT\0"                      \
           "b\11" "HASSEMAPHORE\0"                 \
           "b\12" "TRYFIXED\0"                     \
           "b\13" "WIRED\0"                        \
           "F\14\1\0"                              \
                   ":\0" "FILE\0"                  \
                   ":\1" "ANONYMOUS\0"             \
           "b\15" "STACK\0"                        \
           "F\3\010\0"                            \
                   ":\000" "ALIGN=NONE\0"          \
                   ":\012" "ALIGN=1KB\0"           \
                   ":\013" "ALIGN=2KB\0"           \
                   ":\014" "ALIGN=4KB\0"           \
                   ":\015" "ALIGN=8KB\0"           \
                   ":\016" "ALIGN=16KB\0"          \
                   ":\017" "ALIGN=32KB\0"          \
                   ":\020" "ALIGN=64KB\0"          \
                   ":\021" "ALIGN=128KB\0"         \
                   ":\022" "ALIGN=256KB\0"         \
                   ":\023" "ALIGN=512KB\0"         \
                   ":\024" "ALIGN=1MB\0"           \
                   ":\025" "ALIGN=2MB\0"           \
                   ":\026" "ALIGN=4MB\0"           \
                   ":\027" "ALIGN=8MB\0"           \
                   ":\030" "ALIGN=16MB\0"          \
                   ":\034" "ALIGN=256MB\0"         \
                   ":\040" "ALIGN=4GB\0"           \
                   ":\044" "ALIGN=64GB\0"          \
                   ":\050" "ALIGN=1TB\0"           \
                   ":\054" "ALIGN=16TB\0"          \
                   ":\060" "ALIGN=256TB\0"         \
                   ":\064" "ALIGN=4PB\0"           \
                   ":\070" "ALIGN=64PB\0"          \
                   ":\074" "ALIGN=256PB\0"         \
                   "*"     "ALIGN=2^%ju\0"
   #endif
   
   /*
    * 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 advisory values.
    * Note: keep consistent with the original definitions 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 definitions,
    * 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_ZERO        4       /* zero in child */
   #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);
   int     shm_open(const char *, int, mode_t);
   int     shm_unlink(const char *);
   __END_DECLS
   
   #endif /* !_KERNEL */
   
   #endif /* !_SYS_MMAN_H_ */

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