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
_php_stream_mmap_range(php_stream * stream,size_t offset,size_t length,php_stream_mmap_access_t mode,size_t * mapped_len)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 {
23 php_stream_mmap_range range;
24
25 range.offset = offset;
26 range.length = length;
27 range.mode = mode;
28 range.mapped = NULL;
29
30 if (PHP_STREAM_OPTION_RETURN_OK == php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_MAP_RANGE, &range)) {
31 if (mapped_len) {
32 *mapped_len = range.length;
33 }
34 return range.mapped;
35 }
36 return NULL;
37 }
38
_php_stream_mmap_unmap(php_stream * stream)39 PHPAPI int _php_stream_mmap_unmap(php_stream *stream)
40 {
41 return php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_UNMAP, NULL) == PHP_STREAM_OPTION_RETURN_OK;
42 }
43
_php_stream_mmap_unmap_ex(php_stream * stream,zend_off_t readden)44 PHPAPI int _php_stream_mmap_unmap_ex(php_stream *stream, zend_off_t readden)
45 {
46 int ret = 1;
47
48 if (php_stream_seek(stream, readden, SEEK_CUR) != 0) {
49 ret = 0;
50 }
51 if (php_stream_mmap_unmap(stream) == 0) {
52 ret = 0;
53 }
54
55 return ret;
56 }
57
