mirror of
https://github.com/php/php-src.git
synced 2024-12-04 23:34:25 +08:00
84 lines
3.2 KiB
C
84 lines
3.2 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| PHP Version 5 |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1997-2004 The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 3.0 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_0.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_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)
|
|
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
|
|
*/
|