Imported from /home/lorry/working-area/delta_php2/php-5.4.13.tar.bz2.HEADphp-5.4.13master

1 files changed, 75 insertions, 0 deletions

diff --git a/main/streams/mmap.c b/main/streams/mmap.c
new file mode 100644
index 0000000..4f9388c
--- /dev/null
+++ b/main/streams/mmap.c
@@ -0,0 +1,75 @@
+/*
+  +----------------------------------------------------------------------+
+  | PHP Version 5                                                        |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 1997-2013 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
+ */