summaryrefslogtreecommitdiff
path: root/mmap/unix/mmap.c
blob: 504970a7efdc75fb07bce11d409b9d9c510eb77a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  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. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

#include "mmap_h.h"
#include "apr_portable.h"

#if HAVE_MMAP || defined(BEOS)

static ap_status_t mmap_cleanup(void *themmap)
{
    ap_mmap_t *mm = themmap;
    int rv;
#ifdef BEOS
    rv = delete_area(mm->area);

    if (rv == 0) {
        mm->mm = (caddr_t)-1;
        return APR_SUCCESS;
    }
#else
    rv = munmap(mm->mm, mm->size);

    if (rv == 0) {
        mm->mm = (caddr_t)-1;
        return APR_SUCCESS;
    }
#endif
    return errno;
}

ap_status_t ap_mmap_create(ap_mmap_t **new, ap_file_t *file, ap_off_t offset, 
       ap_size_t size, ap_pool_t *cont)
{
#ifdef BEOS
    void *mm;
    area_id aid = -1;
    char *areaname = "apr_mmap\0";
    uint32 pages = 0;
#else
    caddr_t mm;
#endif
   
    if (file == NULL || file->filedes == -1 || file->buffered)
        return APR_EBADF;
    (*new) = (ap_mmap_t *)ap_pcalloc(cont, sizeof(ap_mmap_t));
    
    ap_seek(file, APR_SET, &offset);
#ifdef BEOS
    pages = ((size -1) / B_PAGE_SIZE) + 1;

    aid = create_area(areaname, &mm , B_ANY_ADDRESS, pages * B_PAGE_SIZE,
        B_FULL_LOCK, B_READ_AREA|B_WRITE_AREA);

    if (aid < B_NO_ERROR) {
        /* we failed to get an mmap'd file... */
        return APR_ENOMEM;
    }

    if (aid >= B_NO_ERROR)
        read(file->filedes, mm, size);
    (*new)->area = aid;
#else

    mm = mmap(NULL, size, PROT_READ, MAP_SHARED, file->filedes ,0);

    if (mm == (caddr_t)-1) {
        /* we failed to get an mmap'd file... */
        return APR_ENOMEM;
    }
#endif

    (*new)->mm = mm;
    (*new)->size = size;
    (*new)->cntxt = cont;

    /* register the cleanup... */
    ap_register_cleanup((*new)->cntxt, (void*)(*new), mmap_cleanup,
             ap_null_cleanup);
    return APR_SUCCESS;
}

ap_status_t ap_mmap_delete(ap_mmap_t *mmap)
{
    ap_status_t rv;

    if (mmap->mm == (caddr_t) -1)
        return APR_ENOENT;
      
    if ((rv = mmap_cleanup(mmap)) == APR_SUCCESS) {
        ap_kill_cleanup(mmap->cntxt, mmap, mmap_cleanup);
        return APR_SUCCESS;
    }
    return rv;
}

#endif