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76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2016 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Wez Furlong <wez@thebrainroom.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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/* Memory Mapping interface for streams */
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#include "php.h"
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#include "php_streams_int.h"
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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)
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{
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php_stream_mmap_range range;
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range.offset = offset;
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range.length = length;
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range.mode = mode;
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range.mapped = NULL;
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/* For now, we impose an arbitrary limit to avoid
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* runaway swapping when large files are passed thru. */
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if (length > 4 * 1024 * 1024) {
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return NULL;
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}
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if (PHP_STREAM_OPTION_RETURN_OK == php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_MAP_RANGE, &range)) {
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if (mapped_len) {
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*mapped_len = range.length;
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}
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return range.mapped;
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}
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return NULL;
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}
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PHPAPI int _php_stream_mmap_unmap(php_stream *stream)
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{
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return php_stream_set_option(stream, PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_UNMAP, NULL) == PHP_STREAM_OPTION_RETURN_OK ? 1 : 0;
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}
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PHPAPI int _php_stream_mmap_unmap_ex(php_stream *stream, zend_off_t readden)
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{
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int ret = 1;
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if (php_stream_seek(stream, readden, SEEK_CUR) != 0) {
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ret = 0;
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}
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if (php_stream_mmap_unmap(stream) == 0) {
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ret = 0;
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}
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return ret;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: noet sw=4 ts=4 fdm=marker
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* vim<600: noet sw=4 ts=4
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*/
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