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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 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 "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_mmap.h"
#include "apr_errno.h"
#include "apr_arch_file_io.h"
#include "apr_portable.h"
#include "apr_strings.h"
#if APR_HAS_MMAP
static apr_status_t mmap_cleanup(void *themmap)
{
apr_mmap_t *mm = themmap;
apr_mmap_t *next = APR_RING_NEXT(mm,link);
apr_status_t 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;
}
if (mm->mv) {
if (!UnmapViewOfFile(mm->mv))
{
apr_status_t rv = apr_get_os_error();
CloseHandle(mm->mhandle);
mm->mv = NULL;
mm->mhandle = NULL;
return rv;
}
mm->mv = NULL;
}
if (mm->mhandle)
{
if (!CloseHandle(mm->mhandle))
{
apr_status_t rv = apr_get_os_error();
CloseHandle(mm->mhandle);
mm->mhandle = NULL;
return rv;
}
mm->mhandle = NULL;
}
return APR_SUCCESS;
}
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)
{
static DWORD memblock = 0;
DWORD fmaccess = 0;
DWORD mvaccess = 0;
DWORD offlo;
DWORD offhi;
if (size == 0)
return APR_EINVAL;
if (flag & APR_MMAP_WRITE)
fmaccess |= PAGE_READWRITE;
else if (flag & APR_MMAP_READ)
fmaccess |= PAGE_READONLY;
if (flag & APR_MMAP_READ)
mvaccess |= FILE_MAP_READ;
if (flag & APR_MMAP_WRITE)
mvaccess |= FILE_MAP_WRITE;
if (!file || !file->filehand || file->filehand == INVALID_HANDLE_VALUE
|| file->buffered)
return APR_EBADF;
if (!memblock)
{
SYSTEM_INFO si;
GetSystemInfo(&si);
memblock = si.dwAllocationGranularity;
}
*new = apr_pcalloc(cont, sizeof(apr_mmap_t));
(*new)->pstart = (offset / memblock) * memblock;
(*new)->poffset = offset - (*new)->pstart;
(*new)->psize = (apr_size_t)((*new)->poffset) + size;
/* The size of the CreateFileMapping object is the current size
* of the size of the mmap object (e.g. file size), not the size
* of the mapped region!
*/
(*new)->mhandle = CreateFileMapping(file->filehand, NULL, fmaccess,
0, 0, NULL);
if (!(*new)->mhandle || (*new)->mhandle == INVALID_HANDLE_VALUE)
{
*new = NULL;
return apr_get_os_error();
}
offlo = (DWORD)(*new)->pstart;
offhi = (DWORD)((*new)->pstart >> 32);
(*new)->mv = MapViewOfFile((*new)->mhandle, mvaccess, offhi,
offlo, (*new)->psize);
if (!(*new)->mv)
{
apr_status_t rv = apr_get_os_error();
CloseHandle((*new)->mhandle);
*new = NULL;
return rv;
}
(*new)->mm = (char*)((*new)->mv) + (*new)->poffset;
(*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
|
