Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 713a3fc58c
Fetching contributors…

Cannot retrieve contributors at this time

file 75 lines (64 sloc) 2.484 kb
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
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Wez Furlong <wez@thebrainroom.com> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

/* Memory Mapping interface for streams */
#include "php.h"
#include "php_streams_int.h"

PHPAPI char *_php_stream_mmap_range(php_stream *stream, size_t offset, size_t length, php_stream_mmap_operation_t mode, size_t *mapped_len TSRMLS_DC)
{
php_stream_mmap_range range;

range.offset = offset;
range.length = length;
range.mode = mode;
range.mapped = NULL;

/* For now, we impose an arbitrary limit to avoid
* runaway swapping when large files are passed thru. */
if (length > 4 * 1024 * 1024) {
return NULL;
}

if (PHP_STREAM_OPTION_RETURN_OK == php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_MAP_RANGE, &range)) {
if (mapped_len) {
*mapped_len = range.length;
}
return range.mapped;
}
return NULL;
}

PHPAPI int _php_stream_mmap_unmap(php_stream *stream TSRMLS_DC)
{
return php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_UNMAP, NULL) == PHP_STREAM_OPTION_RETURN_OK ? 1 : 0;
}

PHPAPI int _php_stream_mmap_unmap_ex(php_stream *stream, off_t readden TSRMLS_DC)
{
int ret = 1;

if (php_stream_seek(stream, readden, SEEK_CUR) != 0) {
ret = 0;
}
if (php_stream_mmap_unmap(stream) == 0) {
ret = 0;
}

return ret;
}

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
Something went wrong with that request. Please try again.