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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_strings.h"
#include "apr_mmap.h"
#include "apr_errno.h"
#include "apr_arch_file_io.h"
#include "apr_portable.h"
/* System headers required for the mmap library */
#ifdef BEOS
#include <kernel/OS.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#if APR_HAS_MMAP || defined(BEOS)
static apr_status_t mmap_cleanup(void *themmap)
{
apr_mmap_t *mm = themmap;
apr_mmap_t *next = APR_RING_NEXT(mm,link);
int rv = 0;
/* we no longer refer to the mmaped region */
APR_RING_REMOVE(mm,link);
APR_RING_NEXT(mm,link) = NULL;
APR_RING_PREV(mm,link) = NULL;
if (next != mm) {
/* more references exist, so we're done */
return APR_SUCCESS;
}
#ifdef BEOS
rv = delete_area(mm->area);
#else
rv = munmap(mm->mm, mm->size);
#endif
mm->mm = (void *)-1;
if (rv == 0) {
return APR_SUCCESS;
}
return errno;
}
APR_DECLARE(apr_status_t) apr_mmap_create(apr_mmap_t **new,
apr_file_t *file, apr_off_t offset,
apr_size_t size, apr_int32_t flag,
apr_pool_t *cont)
{
void *mm;
#ifdef BEOS
area_id aid = -1;
uint32 pages = 0;
#else
apr_int32_t native_flags = 0;
#endif
if (size == 0)
return APR_EINVAL;
if (file == NULL || file->filedes == -1 || file->buffered)
return APR_EBADF;
(*new) = (apr_mmap_t *)apr_pcalloc(cont, sizeof(apr_mmap_t));
#ifdef BEOS
/* XXX: mmap shouldn't really change the seek offset */
apr_file_seek(file, APR_SET, &offset);
/* There seems to be some strange interactions that mean our area must
* be set as READ & WRITE or writev will fail! Go figure...
* So we ignore the value in flags and always ask for both READ and WRITE
*/
pages = (size + B_PAGE_SIZE -1) / B_PAGE_SIZE;
aid = create_area("apr_mmap", &mm , B_ANY_ADDRESS, pages * B_PAGE_SIZE,
B_NO_LOCK, B_WRITE_AREA|B_READ_AREA);
if (aid < B_NO_ERROR) {
/* we failed to get an area we can use... */
*new = NULL;
return APR_ENOMEM;
}
if (aid >= B_NO_ERROR)
read(file->filedes, mm, size);
(*new)->area = aid;
#else
if (flag & APR_MMAP_WRITE) {
native_flags |= PROT_WRITE;
}
if (flag & APR_MMAP_READ) {
native_flags |= PROT_READ;
}
mm = mmap(NULL, size, native_flags, MAP_SHARED, file->filedes, offset);
if (mm == (void *)-1) {
/* we failed to get an mmap'd file... */
*new = NULL;
return errno;
}
#endif
(*new)->mm = mm;
(*new)->size = size;
(*new)->cntxt = cont;
APR_RING_ELEM_INIT(*new, link);
/* register the cleanup... */
apr_pool_cleanup_register((*new)->cntxt, (void*)(*new), mmap_cleanup,
apr_pool_cleanup_null);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_mmap_dup(apr_mmap_t **new_mmap,
apr_mmap_t *old_mmap,
apr_pool_t *p,
int transfer_ownership)
{
*new_mmap = (apr_mmap_t *)apr_pmemdup(p, old_mmap, sizeof(apr_mmap_t));
(*new_mmap)->cntxt = p;
APR_RING_INSERT_AFTER(old_mmap, *new_mmap, link);
apr_pool_cleanup_register(p, *new_mmap, mmap_cleanup,
apr_pool_cleanup_null);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_mmap_delete(apr_mmap_t *mm)
{
return apr_pool_cleanup_run(mm->cntxt, mm, mmap_cleanup);
}
#endif
|