blob: 0b300ee313b0211ec3860a2207a1905e6509d49f (
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
|
// mmap_mm.cpp - in memory (no file) version
/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/pch.h"
#include "mongo/util/mmap.h"
/* in memory (no file) version */
namespace mongo {
MemoryMappedFile::MemoryMappedFile() : _uniqueId(0) {
fd = 0;
maphandle = 0;
view = 0;
len = 0;
}
void MemoryMappedFile::close() {
if ( view )
free( view );
view = 0;
len = 0;
}
void* MemoryMappedFile::map(const char *filename, long& length , int options ) {
verify( length );
view = malloc( length );
return view;
}
void MemoryMappedFile::flush(bool sync) {
}
void MemoryMappedFile::_lock() {}
void MemoryMappedFile::_unlock() {}
}
|
