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Annotation of sys/sys/mman.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: mman.h,v 1.18 2003/07/21 22:52:19 tedu Exp $  */
                      2: /*     $NetBSD: mman.h,v 1.11 1995/03/26 20:24:23 jtc Exp $    */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1982, 1986, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. Neither the name of the University nor the names of its contributors
                     17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  *
                     32:  *     @(#)mman.h      8.1 (Berkeley) 6/2/93
                     33:  */
                     34:
                     35: /*
                     36:  * Protections are chosen from these bits, or-ed together
                     37:  */
                     38: #define        PROT_NONE       0x00    /* no permissions */
                     39: #define        PROT_READ       0x01    /* pages can be read */
                     40: #define        PROT_WRITE      0x02    /* pages can be written */
                     41: #define        PROT_EXEC       0x04    /* pages can be executed */
                     42:
                     43: /*
                     44:  * Flags contain sharing type and options.
                     45:  * Sharing types; choose one.
                     46:  */
                     47: #define        MAP_SHARED      0x0001  /* share changes */
                     48: #define        MAP_PRIVATE     0x0002  /* changes are private */
                     49: #define        MAP_COPY        0x0004  /* "copy" region at mmap time */
                     50:
                     51: /*
                     52:  * Other flags
                     53:  */
                     54: #define        MAP_FIXED        0x0010 /* map addr must be exactly as requested */
                     55: #define        MAP_RENAME       0x0020 /* Sun: rename private pages to file */
                     56: #define        MAP_NORESERVE    0x0040 /* Sun: don't reserve needed swap area */
                     57: #define        MAP_INHERIT      0x0080 /* region is retained after exec */
                     58: #define        MAP_NOEXTEND     0x0100 /* for MAP_FILE, don't change file size */
                     59: #define        MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
                     60: #define        MAP_TRYFIXED     0x0400 /* attempt hint address, even within heap */
                     61:
                     62: /*
                     63:  * Error return from mmap()
                     64:  */
                     65: #define MAP_FAILED     ((void *)-1)
                     66:
                     67: /*
                     68:  * Mapping type
                     69:  */
                     70: #define        MAP_FILE        0x0000  /* map from file (default) */
                     71: #define        MAP_ANON        0x1000  /* allocated from memory, swap space */
                     72: #define        MAP_FLAGMASK    0x17f7
                     73:
                     74: /*
                     75:  * Advice to madvise
                     76:  */
                     77: #define        MADV_NORMAL     0       /* no further special treatment */
                     78: #define        MADV_RANDOM     1       /* expect random page references */
                     79: #define        MADV_SEQUENTIAL 2       /* expect sequential page references */
                     80: #define        MADV_WILLNEED   3       /* will need these pages */
                     81: #define        MADV_DONTNEED   4       /* dont need these pages */
                     82: #define        MADV_SPACEAVAIL 5       /* insure that resources are reserved */
                     83: #define        MADV_FREE       6       /* pages are empty, free them */
                     84:
                     85: /*
                     86:  * Flags to minherit
                     87:  */
                     88: #define MAP_INHERIT_SHARE      0       /* share with child */
                     89: #define MAP_INHERIT_COPY       1       /* copy into child */
                     90: #define MAP_INHERIT_NONE       2       /* absent from child */
                     91: #define MAP_INHERIT_DONATE_COPY        3       /* copy and delete -- not
                     92:                                           implemented in UVM */
                     93:
                     94: /*
                     95:  * Flags to msync
                     96:  */
                     97: #define        MS_ASYNC        0x01    /* perform asynchronous writes */
                     98: #define        MS_SYNC         0x02    /* perform synchronous writes */
                     99: #define        MS_INVALIDATE   0x04    /* invalidate cached data */
                    100:
                    101: /*
                    102:  * Flags to mlockall
                    103:  */
                    104: #define        MCL_CURRENT     0x01    /* lock all pages currently mapped */
                    105: #define        MCL_FUTURE      0x02    /* lock all pages mapped in the future */
                    106:
                    107: #ifndef _KERNEL
                    108:
                    109: #include <sys/cdefs.h>
                    110:
                    111: __BEGIN_DECLS
                    112: /* Some of these int's should probably be size_t's */
                    113: void * mmap(void *, size_t, int, int, int, off_t);
                    114: int    mprotect(void *, size_t, int);
                    115: int    munmap(void *, size_t);
                    116: int    msync(void *, size_t, int);
                    117: int    mlock(const void *, size_t);
                    118: int    munlock(const void *, size_t);
                    119: int    mlockall(int);
                    120: int    munlockall(void);
                    121: int    madvise(void *, size_t, int);
                    122: int    mincore(void *, size_t, char *);
                    123: int    minherit(void *, size_t, int);
                    124: void * mquery(void *, size_t, int, int, int, off_t);
                    125: __END_DECLS
                    126:
                    127: #endif /* !_KERNEL */