/src/php-src/main/streams/mmap.c
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1 | | /* |
2 | | +----------------------------------------------------------------------+ |
3 | | | Copyright (c) The PHP Group | |
4 | | +----------------------------------------------------------------------+ |
5 | | | This source file is subject to version 3.01 of the PHP license, | |
6 | | | that is bundled with this package in the file LICENSE, and is | |
7 | | | available through the world-wide-web at the following url: | |
8 | | | https://www.php.net/license/3_01.txt | |
9 | | | If you did not receive a copy of the PHP license and are unable to | |
10 | | | obtain it through the world-wide-web, please send a note to | |
11 | | | license@php.net so we can mail you a copy immediately. | |
12 | | +----------------------------------------------------------------------+ |
13 | | | Author: Wez Furlong <wez@thebrainroom.com> | |
14 | | +----------------------------------------------------------------------+ |
15 | | */ |
16 | | |
17 | | /* Memory Mapping interface for streams */ |
18 | | #include "php.h" |
19 | | #include "php_streams_int.h" |
20 | | |
21 | | PHPAPI char *_php_stream_mmap_range(php_stream *stream, size_t offset, size_t length, php_stream_mmap_access_t mode, size_t *mapped_len) |
22 | 0 | { |
23 | 0 | php_stream_mmap_range range; |
24 | |
|
25 | 0 | range.offset = offset; |
26 | 0 | range.length = length; |
27 | 0 | range.mode = mode; |
28 | 0 | range.mapped = NULL; |
29 | |
|
30 | 0 | if (PHP_STREAM_OPTION_RETURN_OK == php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_MAP_RANGE, &range)) { |
31 | 0 | if (mapped_len) { |
32 | 0 | *mapped_len = range.length; |
33 | 0 | } |
34 | 0 | return range.mapped; |
35 | 0 | } |
36 | 0 | return NULL; |
37 | 0 | } |
38 | | |
39 | | PHPAPI int _php_stream_mmap_unmap(php_stream *stream) |
40 | 0 | { |
41 | 0 | return php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_UNMAP, NULL) == PHP_STREAM_OPTION_RETURN_OK; |
42 | 0 | } |
43 | | |
44 | | PHPAPI int _php_stream_mmap_unmap_ex(php_stream *stream, zend_off_t readden) |
45 | 0 | { |
46 | 0 | int ret = 1; |
47 | |
|
48 | 0 | if (php_stream_seek(stream, readden, SEEK_CUR) != 0) { |
49 | 0 | ret = 0; |
50 | 0 | } |
51 | 0 | if (php_stream_mmap_unmap(stream) == 0) { |
52 | 0 | ret = 0; |
53 | 0 | } |
54 | |
|
55 | 0 | return ret; |
56 | 0 | } |