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- <?php
- /**
- *
- * The System V driver for SharedMemory
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * 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 web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category System
- * @package System_Sharedmemory
- * @author Evgeny Stepanischev <bolk@lixil.ru>
- * @copyright 2005 Evgeny Stepanischev
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version CVS: $Id:$
- * @link http://pear.php.net/package/System_SharedMemory
- */
-
- /**
- *
- * The methods PEAR SharedMemory uses to interact with PHP's System V extension
- * for interacting with System V shared memory
- *
- * These methods overload the ones declared System_SharedMemory_Common
- *
- * @category System
- * @package System_Sharedmemory
- * @package System_Sharedmemory
- * @author Evgeny Stepanischev <bolk@lixil.ru>
- * @copyright 2005 Evgeny Stepanischev
- * @license http://www.php.net/license/3_0.txt PHP License 3.0
- * @version CVS: $Id:$
- * @link http://pear.php.net/package/System_SharedMemory
- */
-
- require_once 'System/SharedMemory/Common.php';
- require_once "PEAR.php";
-
- // {{{ class System_SharedMemory_Systemv
-
- class System_SharedMemory_Systemv extends System_SharedMemory_Common
- {
- // {{{ properties
- /**
- * true if plugin was connected to backend
- *
- * @var bool
- *
- * @access private
- */
- var $_connected;
-
- /**
- * handler for shmop_* functions
- *
- * @var string
- *
- * @access private
- */
- var $_h;
- // }}}
- // {{{ constructor
-
- /**
- * Constructor. Init all variables.
- *
- * @param array $options
- *
- * @access public
- */
- function System_SharedMemory_Systemv($options)
- {
- extract($this->_default($options, array
- (
- 'size' => false,
- 'project' => 's',
- )));
-
- if ($size === false) {
- $this->_h = shm_attach($this->_ftok($project));
- } else {
- if ($size < SHMMIN || $size > SHMMAX) {
- return $this->_connection = false;
- }
-
- $this->_h = shm_attach($this->_ftok($project), $size);
- }
-
- $this->_connection = true;
- }
- // }}}
- // {{{ isConnected()
-
- /**
- * returns true if plugin was
- * successfully connected to backend
- *
- * @return bool true if connected
- * @access public
- */
- function isConnected()
- {
- return $this->_connected;
- }
- // }}}
- // {{{ get()
-
- /**
- * returns value of variable in shared mem
- *
- * @param int $name name of variable
- *
- * @return mixed value of the variable
- * @access public
- */
- function get($name)
- {
- return shm_get_var($this->_h, $this->_s2i($name));
- }
- // }}}
- // {{{ set()
-
- /**
- * set value of variable in shared mem
- *
- * @param string $name name of the variable
- * @param string $value value of the variable
- *
- * @return bool true on success, false on fail
- * @access public
- */
- function set($name, $value)
- {
- return shm_put_var($this->_h, $this->_s2i($name), $value);
- }
- // }}}
- // {{{ rm()
-
- /**
- * remove variable from memory
- *
- * @param string $name name of the variable
- *
- * @return bool true on success, false on fail
- * @access public
- */
- function rm($name)
- {
- return shm_remove_var($this->_h, $this->_s2i($name));
- }
- // }}}
- // {{{ _ftok()
-
- /**
- * ftok emulation for Windows
- *
- * @param string $project project ID
- *
- * @access private
- */
- function _ftok($project)
- {
- if (function_exists('ftok')) {
- return ftok(__FILE__, $project);
- }
-
- $s = stat(__FILE__);
- return sprintf("%u", (($s['ino'] & 0xffff) | (($s['dev'] & 0xff) << 16) |
- (($project & 0xff) << 24)));
- }
- // }}}
- // {{{ _s2i()
-
- /**
- * convert string to int
- *
- * @param string $name string to conversion
- *
- * @access private
- */
- function _s2i($name)
- {
- return unpack('N', str_pad($name, 4, "\0", STR_PAD_LEFT));
- }
- // }}}
- }
- // }}}
- ?>