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Annotation of Net2/sys/mman.h, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1982, 1986 The Regents of the University of California.
        !             3:  * 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      7.5 (Berkeley) 6/27/91
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * Protections are chosen from these bits, or-ed together
        !            38:  */
        !            39: #define        PROT_READ       0x04    /* pages can be read */
        !            40: #define        PROT_WRITE      0x02    /* pages can be written */
        !            41: #define        PROT_EXEC       0x01    /* pages can be executed */
        !            42: 
        !            43: /*
        !            44:  * Flags contain mapping type, sharing type and options.
        !            45:  * Mapping type; choose one
        !            46:  */
        !            47: #define        MAP_FILE        0x0001  /* mapped from a file or device */
        !            48: #define        MAP_ANON        0x0002  /* allocated from memory, swap space */
        !            49: #define        MAP_TYPE        0x000f  /* mask for type field */
        !            50: 
        !            51: /*
        !            52:  * Sharing types; choose one
        !            53:  */
        !            54: #define        MAP_COPY        0x0020  /* "copy" region at mmap time */
        !            55: #define        MAP_SHARED      0x0010  /* share changes */
        !            56: #define        MAP_PRIVATE     0x0000  /* changes are private */
        !            57: 
        !            58: /*
        !            59:  * Other flags
        !            60:  */
        !            61: #define        MAP_FIXED       0x0100  /* map addr must be exactly as requested */
        !            62: #define        MAP_NOEXTEND    0x0200  /* for MAP_FILE, don't change file size */
        !            63: #define        MAP_HASSEMPHORE 0x0400  /* region may contain semaphores */
        !            64: #define        MAP_INHERIT     0x0800  /* region is retained after exec */
        !            65: 
        !            66: /*
        !            67:  * Advice to madvise
        !            68:  */
        !            69: #define        MADV_NORMAL     0       /* no further special treatment */
        !            70: #define        MADV_RANDOM     1       /* expect random page references */
        !            71: #define        MADV_SEQUENTIAL 2       /* expect sequential page references */
        !            72: #define        MADV_WILLNEED   3       /* will need these pages */
        !            73: #define        MADV_DONTNEED   4       /* dont need these pages */
        !            74: 
        !            75: #ifndef KERNEL
        !            76: 
        !            77: #include <sys/cdefs.h>
        !            78: 
        !            79: __BEGIN_DECLS
        !            80: /* Some of these int's should probably be size_t's */
        !            81: caddr_t        mmap __P((caddr_t, size_t, int, int, int, off_t));
        !            82: int    mprotect __P((caddr_t, int, int));
        !            83: int    munmap __P((caddr_t, int));
        !            84: int    msync __P((caddr_t, int));
        !            85: __END_DECLS
        !            86: 
        !            87: #endif /* !KERNEL */

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