1 files changed, 88 insertions, 0 deletions
diff --git a/main/streams/php_stream_mmap.h b/main/streams/php_stream_mmap.h
new file mode 100644
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--- /dev/null
+++ b/main/streams/php_stream_mmap.h
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+/*
+  +----------------------------------------------------------------------+
+  | 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.
+ * The intention is to provide a uniform interface over the most common
+ * operations that are used within PHP itself, rather than a complete
+ * API for all memory mapping needs.
+ *
+ * ATM, we support only mmap(), but win32 memory mapping support will
+ * follow soon.
+ * */
+
+typedef enum {
+	/* Does the stream support mmap ? */
+	PHP_STREAM_MMAP_SUPPORTED,
+	/* Request a range and offset to be mapped;
+	 * while mapped, you MUST NOT use any read/write functions
+	 * on the stream (win9x compatibility) */
+	PHP_STREAM_MMAP_MAP_RANGE,
+	/* Unmap the last range that was mapped for the stream */
+	PHP_STREAM_MMAP_UNMAP
+} php_stream_mmap_operation_t;
+	
+typedef enum {
+	PHP_STREAM_MAP_MODE_READONLY,
+	PHP_STREAM_MAP_MODE_READWRITE,
+	PHP_STREAM_MAP_MODE_SHARED_READONLY,
+	PHP_STREAM_MAP_MODE_SHARED_READWRITE
+} php_stream_mmap_access_t;
+
+typedef struct {
+	/* requested offset and length.
+	 * If length is 0, the whole file is mapped */
+	size_t offset;
+	size_t length;
+	
+	php_stream_mmap_access_t mode;
+	
+	/* returned mapped address */
+	char *mapped;
+
+} php_stream_mmap_range;
+
+#define PHP_STREAM_MMAP_ALL 0
+
+#define php_stream_mmap_supported(stream)	(_php_stream_set_option((stream), PHP_STREAM_OPTION_MMAP_API, PHP_STREAM_MMAP_SUPPORTED, NULL TSRMLS_CC) == 0 ? 1 : 0)
+
+/* Returns 1 if the stream in its current state can be memory mapped,
+ * 0 otherwise */
+#define php_stream_mmap_possible(stream)			(!php_stream_is_filtered((stream)) && php_stream_mmap_supported((stream)))
+
+BEGIN_EXTERN_C()
+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);
+#define php_stream_mmap_range(stream, offset, length, mode, mapped_len)	_php_stream_mmap_range((stream), (offset), (length), (mode), (mapped_len) TSRMLS_CC)
+
+/* un-maps the last mapped range */
+PHPAPI int _php_stream_mmap_unmap(php_stream *stream TSRMLS_DC);
+#define php_stream_mmap_unmap(stream)				_php_stream_mmap_unmap((stream) TSRMLS_CC)
+
+PHPAPI int _php_stream_mmap_unmap_ex(php_stream *stream, off_t readden TSRMLS_DC);
+#define php_stream_mmap_unmap_ex(stream, readden)			_php_stream_mmap_unmap_ex((stream), (readden) TSRMLS_CC)
+END_EXTERN_C()
+
+/*
+ * 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
+ */