/* +----------------------------------------------------------------------+ | PHP Version 5 | +----------------------------------------------------------------------+ | Copyright (c) 1997-2008 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: mmap.c,v 1.8.2.1.2.2 2007/12/31 07:20:15 sebastian Exp $ */ /* 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 2MB limit to avoid * runaway swapping when large files are passed thru. */ if (length > 2 * 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; } /* * 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 */