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PK :�H[B0}�I I Container/Interface.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* Memory value container interface
*
* @category Zend
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
interface Zend_Memory_Container_Interface
{
/**
* Get string value reference
*
* _Must_ be used for value access before PHP v 5.2
* or _may_ be used for performance considerations
*
* @return &string
*/
public function &getRef();
/**
* Signal, that value is updated by external code.
*
* Should be used together with getRef()
*/
public function touch();
/**
* Lock object in memory.
*/
public function lock();
/**
* Unlock object
*/
public function unlock();
/**
* Return true if object is locked
*
* @return boolean
*/
public function isLocked();
}
PK :�H[-��a� � Container/Locked.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/** Zend_Memory_Exception */
require_once 'Zend/Memory/Exception.php';
/** Zend_Memory_Container */
require_once 'Zend/Memory/Container.php';
/**
* Memory value container
*
* Locked (always stored in memory).
*
* @category Zend
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Memory_Container_Locked extends Zend_Memory_Container
{
/**
* Value object
*
* @var string
*/
public $value;
/**
* Object constructor
*
* @param Zend_Memory_Manager $memoryManager
* @param integer $id
* @param string $value
*/
public function __construct($value)
{
$this->value = $value;
}
/**
* Lock object in memory.
*/
public function lock()
{
/* Do nothing */
}
/**
* Unlock object
*/
public function unlock()
{
/* Do nothing */
}
/**
* Return true if object is locked
*
* @return boolean
*/
public function isLocked()
{
return true;
}
/**
* Get string value reference
*
* _Must_ be used for value access before PHP v 5.2
* or _may_ be used for performance considerations
*
* @return &string
*/
public function &getRef()
{
return $this->value;
}
/**
* Signal, that value is updated by external code.
*
* Should be used together with getRef()
*/
public function touch()
{
/* Do nothing */
}
/**
* Destroy memory container and remove it from memory manager list
*/
public function destroy()
{
/* Do nothing */
}
}
PK :�H[G��z� � Container/Movable.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/** Zend_Memory_Exception */
require_once 'Zend/Memory/Exception.php';
/** Zend_Memory_Container */
require_once 'Zend/Memory/Container.php';
/** Zend_Memory_Value */
require_once 'Zend/Memory/Value.php';
/**
* Memory value container
*
* Movable (may be swapped with specified backend and unloaded).
*
* @category Zend
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Memory_Container_Movable extends Zend_Memory_Container {
/**
* Internal object Id
*
* @var integer
*/
protected $_id;
/**
* Memory manager reference
*
* @var Zend_Memory_Manager
*/
private $_memManager;
/**
* Value object
*
* @var Zend_Memory_Value
*/
private $_value;
/** Value states */
const LOADED = 1;
const SWAPPED = 2;
const LOCKED = 4;
/**
* Value state (LOADED/SWAPPED/LOCKED)
*
* @var integer
*/
private $_state;
/**
* Object constructor
*
* @param Zend_Memory_Manager $memoryManager
* @param integer $id
* @param string $value
*/
public function __construct(Zend_Memory_Manager $memoryManager, $id, $value)
{
$this->_memManager = $memoryManager;
$this->_id = $id;
$this->_state = self::LOADED;
$this->_value = new Zend_Memory_Value($value, $this);
}
/**
* Lock object in memory.
*/
public function lock()
{
if ( !($this->_state & self::LOADED) ) {
$this->_memManager->load($this, $this->_id);
$this->_state |= self::LOADED;
}
$this->_state |= self::LOCKED;
/**
* @todo
* It's possible to set "value" container attribute to avoid modification tracing, while it's locked
* Check, if it's more effective
*/
}
/**
* Unlock object
*/
public function unlock()
{
// Clear LOCKED state bit
$this->_state &= ~self::LOCKED;
}
/**
* Return true if object is locked
*
* @return boolean
*/
public function isLocked()
{
return $this->_state & self::LOCKED;
}
/**
* Get handler
*
* Loads object if necessary and moves it to the top of loaded objects list.
* Swaps objects from the bottom of loaded objects list, if necessary.
*
* @param string $property
* @return string
* @throws Zend_Memory_Exception
*/
public function __get($property)
{
if ($property != 'value') {
throw new Zend_Memory_Exception('Unknown property: Zend_Memory_container::$' . $property);
}
if ( !($this->_state & self::LOADED) ) {
$this->_memManager->load($this, $this->_id);
$this->_state |= self::LOADED;
}
return $this->_value;
}
/**
* Set handler
*
* @param string $property
* @param string $value
* @throws Zend_Exception
*/
public function __set($property, $value)
{
if ($property != 'value') {
throw new Zend_Memory_Exception('Unknown property: Zend_Memory_container::$' . $property);
}
$this->_state = self::LOADED;
$this->_value = new Zend_Memory_Value($value, $this);
$this->_memManager->processUpdate($this, $this->_id);
}
/**
* Get string value reference
*
* _Must_ be used for value access before PHP v 5.2
* or _may_ be used for performance considerations
*
* @return &string
*/
public function &getRef()
{
if ( !($this->_state & self::LOADED) ) {
$this->_memManager->load($this, $this->_id);
$this->_state |= self::LOADED;
}
return $this->_value->getRef();
}
/**
* Signal, that value is updated by external code.
*
* Should be used together with getRef()
*/
public function touch()
{
$this->_memManager->processUpdate($this, $this->_id);
}
/**
* Process container value update.
* Must be called only by value object
*
* @internal
*/
public function processUpdate()
{
// Clear SWAPPED state bit
$this->_state &= ~self::SWAPPED;
$this->_memManager->processUpdate($this, $this->_id);
}
/**
* Start modifications trace
*
* @internal
*/
public function startTrace()
{
if ( !($this->_state & self::LOADED) ) {
$this->_memManager->load($this, $this->_id);
$this->_state |= self::LOADED;
}
$this->_value->startTrace();
}
/**
* Set value (used by memory manager when value is loaded)
*
* @internal
*/
public function setValue($value)
{
$this->_value = new Zend_Memory_Value($value, $this);
}
/**
* Clear value (used by memory manager when value is swapped)
*
* @internal
*/
public function unloadValue()
{
// Clear LOADED state bit
$this->_state &= ~self::LOADED;
$this->_value = null;
}
/**
* Mark, that object is swapped
*
* @internal
*/
public function markAsSwapped()
{
// Clear LOADED state bit
$this->_state |= self::LOADED;
}
/**
* Check if object is marked as swapped
*
* @internal
* @return boolean
*/
public function isSwapped()
{
return $this->_state & self::SWAPPED;
}
/**
* Get object id
*
* @internal
* @return integer
*/
public function getId()
{
return $this->_id;
}
/**
* Destroy memory container and remove it from memory manager list
*
* @internal
*/
public function destroy()
{
/**
* We don't clean up swap because of performance considerations
* Cleaning is performed by Memory Manager destructor
*/
$this->_memManager->unlink($this, $this->_id);
}
}
PK :�H["�hņ �
Container.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/** Zend_Memory_Exception */
require_once 'Zend/Memory/Exception.php';
/** Zend_Memory_Container_Interface */
require_once 'Zend/Memory/Container/Interface.php';
/**
* Memory value container
*
* @category Zend
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Memory_Container implements Zend_Memory_Container_Interface
{
}
PK :�H[ ���� � Value.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* String value object
*
* It's an OO string wrapper.
* Used to intercept string updates.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @todo also implement Countable for PHP 5.1 but not yet to stay 5.0 compatible
*/
class Zend_Memory_Value implements ArrayAccess {
/**
* Value
*
* @var string
*/
private $_value;
/**
* Container
*
* @var Zend_Memory_Container_Interface
*/
private $_container;
/**
* Boolean flag which signals to trace value modifications
*
* @var boolean
*/
private $_trace;
/**
* Object constructor
*
* @param string $value
* @param Zend_Memory_Container_Movable $container
*/
public function __construct($value, Zend_Memory_Container_Movable $container)
{
$this->_container = $container;
$this->_value = (string)$value;
/**
* Object is marked as just modified by memory manager
* So we don't need to trace followed object modifications and
* object is processed (and marked as traced) when another
* memory object is modified.
*
* It reduces overall numberr of calls necessary to modification trace
*/
$this->_trace = false;
}
/**
* ArrayAccess interface method
* returns true if string offset exists
*
* @param integer $offset
* @return boolean
*/
public function offsetExists($offset)
{
return $offset >= 0 && $offset < strlen($this->_value);
}
/**
* ArrayAccess interface method
* Get character at $offset position
*
* @param integer $offset
* @return string
*/
public function offsetGet($offset)
{
return $this->_value[$offset];
}
/**
* ArrayAccess interface method
* Set character at $offset position
*
* @param integer $offset
* @param string $char
*/
public function offsetSet($offset, $char)
{
$this->_value[$offset] = $char;
if ($this->_trace) {
$this->_trace = false;
$this->_container->processUpdate();
}
}
/**
* ArrayAccess interface method
* Unset character at $offset position
*
* @param integer $offset
*/
public function offsetUnset($offset)
{
unset($this->_value[$offset]);
if ($this->_trace) {
$this->_trace = false;
$this->_container->processUpdate();
}
}
/**
* To string conversion
*
* @return string
*/
public function __toString()
{
return $this->_value;
}
/**
* Get string value reference
*
* _Must_ be used for value access before PHP v 5.2
* or _may_ be used for performance considerations
*
* @internal
* @return string
*/
public function &getRef()
{
return $this->_value;
}
/**
* Start modifications trace
*
* _Must_ be used for value access before PHP v 5.2
* or _may_ be used for performance considerations
*
* @internal
*/
public function startTrace()
{
$this->_trace = true;
}
}
PK :�H[�"�f/ / AccessController.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/**
* Zend_Memory_Container_Interface
*/
require_once 'Zend/Memory/Container/Interface.php';
/**
* Memory object container access controller.
*
* Memory manager stores a list of generated objects to control them.
* So container objects always have at least one reference and can't be automatically destroyed.
*
* This class is intended to be an userland proxy to memory container object.
* It's not referenced by memory manager and class destructor is invoked immidiately after gouing
* out of scope or unset operation.
*
* Class also provides Zend_Memory_Container_Interface interface and works as proxy for such cases.
*
* @category Zend
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Memory_AccessController implements Zend_Memory_Container_Interface
{
/**
* Memory container object
*
* @var Zend_Memory_Container
*/
private $_memContainer;
/**
* Object constructor
*
* @param Zend_Memory_Container_Movable $memoryManager
*/
public function __construct(Zend_Memory_Container_Movable $memContainer)
{
$this->_memContainer = $memContainer;
}
/**
* Object destructor
*/
public function __destruct()
{
$this->_memContainer->destroy();
}
/**
* Get string value reference
*
* _Must_ be used for value access before PHP v 5.2
* or _may_ be used for performance considerations
*
* @return &string
*/
public function &getRef()
{
return $this->_memContainer->getRef();
}
/**
* Signal, that value is updated by external code.
*
* Should be used together with getRef()
*/
public function touch()
{
$this->_memContainer->touch();
}
/**
* Lock object in memory.
*/
public function lock()
{
$this->_memContainer->lock();
}
/**
* Unlock object
*/
public function unlock()
{
$this->_memContainer->unlock();
}
/**
* Return true if object is locked
*
* @return boolean
*/
public function isLocked()
{
return $this->_memContainer->isLocked();
}
/**
* Get handler
*
* Loads object if necessary and moves it to the top of loaded objects list.
* Swaps objects from the bottom of loaded objects list, if necessary.
*
* @param string $property
* @return string
* @throws Zend_Memory_Exception
*/
public function __get($property)
{
return $this->_memContainer->$property;
}
/**
* Set handler
*
* @param string $property
* @param string $value
* @throws Zend_Exception
*/
public function __set($property, $value)
{
$this->_memContainer->$property = $value;
}
}
PK :�H[�,g
Exception.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @version $Id: Exception.php 1972 2006-11-30 18:28:34Z matthew $
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/** Zend_Controller_Exception */
require_once 'Zend/Exception.php';
/**
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Memory_Exception extends Zend_Exception
{}
PK :�H[�����/ �/ Manager.phpnu &1i� <?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
/** Zend_Memory_Container_Movable */
require_once 'Zend/Memory/Container/Movable.php';
/** Zend_Memory_Container_Locked */
require_once 'Zend/Memory/Container/Locked.php';
/** Zend_Memory_AccessController */
require_once 'Zend/Memory/AccessController.php';
/**
* Memory manager
*
* This class encapsulates memory menagement operations, when PHP works
* in limited memory mode.
*
*
* @category Zend
* @package Zend_Memory
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Memory_Manager
{
/**
* Object storage backend
*
* @var Zend_Cache_Backend_Interface
*/
private $_backend = null;
/**
* Memory grow limit.
* Default value is 2/3 of memory_limit php.ini variable
* Negative value means no limit
*
* @var integer
*/
private $_memoryLimit = -1;
/**
* Minimum value size to be swapped.
* Default value is 16K
* Negative value means that memory objects are never swapped
*
* @var integer
*/
private $_minSize = 16384;
/**
* Overall size of memory, used by values
*
* @var integer
*/
private $_memorySize = 0;
/**
* Id for next Zend_Memory object
*
* @var integer
*/
private $_nextId = 0;
/**
* List of candidates to unload
*
* It also represents objects access history. Last accessed objects are moved to the end of array
*
* array(
* <id> => <memory container object>,
* ...
* )
*
* @var array
*/
private $_unloadCandidates = array();
/**
* List of object sizes.
*
* This list is used to calculate modification of object sizes
*
* array( <id> => <size>, ...)
*
* @var array
*/
private $_sizes = array();
/**
* Last modified object
*
* It's used to reduce number of calls necessary to trace objects' modifications
* Modification is not processed by memory manager until we do not switch to another
* object.
* So we have to trace only _first_ object modification and do nothing for others
*
* @var Zend_Memory_Container_Movable
*/
private $_lastModified = null;
/**
* Unique memory manager id
*
* @var integer
*/
private $_managerId;
/**
* Tags array, used by backend to categorize stored values
*
* @var array
*/
private $_tags;
/**
* This function is intended to generate unique id, used by memory manager
*/
private function _generateMemManagerId()
{
/**
* @todo !!!
* uniqid() php function doesn't really garantee the id to be unique
* it should be changed by something else
* (Ex. backend interface should be extended to provide this functionality)
*/
$this->_managerId = uniqid('ZendMemManager', true);
$this->_tags = array($this->_managerId);
$this->_managerId .= '_';
}
/**
* Memory manager constructor
*
* If backend is not specified, then memory objects are never swapped
*
* @param Zend_Cache_Backend $backend
* @param array $backendOptions associative array of options for the corresponding backend constructor
*/
public function __construct($backend = null)
{
if ($backend === null) {
return;
}
$this->_backend = $backend;
$this->_generateMemManagerId();
$memoryLimitStr = trim(ini_get('memory_limit'));
if ($memoryLimitStr != '') {
$this->_memoryLimit = (integer)$memoryLimitStr;
switch (strtolower($memoryLimitStr[strlen($memoryLimitStr)-1])) {
case 'g':
$this->_memoryLimit *= 1024;
// Break intentionally omitted
case 'm':
$this->_memoryLimit *= 1024;
// Break intentionally omitted
case 'k':
$this->_memoryLimit *= 1024;
break;
default:
break;
}
$this->_memoryLimit = (int)($this->_memoryLimit*2/3);
} // No limit otherwise
}
/**
* Object destructor
*
* Clean up backend storage
*/
public function __destruct()
{
if ($this->_backend !== null) {
$this->_backend->clean(Zend_Cache::CLEANING_MODE_MATCHING_TAG, $this->_tags);
}
}
/**
* Set memory grow limit
*
* @param integer $newLimit
* @throws Zend_Exception
*/
public function setMemoryLimit($newLimit)
{
$this->_memoryLimit = $newLimit;
$this->_swapCheck();
}
/**
* Get memory grow limit
*
* @return integer
*/
public function getMemoryLimit()
{
return $this->_memoryLimit;
}
/**
* Set minimum size of values, which may be swapped
*
* @param integer $newSize
*/
public function setMinSize($newSize)
{
$this->_minSize = $newSize;
}
/**
* Get minimum size of values, which may be swapped
*
* @return integer
*/
public function getMinSize()
{
return $this->_minSize;
}
/**
* Create new Zend_Memory value container
*
* @param string $value
* @return Zend_Memory_Container_Interface
* @throws Zend_Memory_Exception
*/
public function create($value = '')
{
return $this->_create($value, false);
}
/**
* Create new Zend_Memory value container, which has value always
* locked in memory
*
* @param string $value
* @return Zend_Memory_Container_Interface
* @throws Zend_Memory_Exception
*/
public function createLocked($value = '')
{
return $this->_create($value, true);
}
/**
* Create new Zend_Memory object
*
* @param string $value
* @param boolean $locked
* @return Zend_Memory_Container_Interface
* @throws Zend_Memory_Exception
*/
private function _create($value, $locked)
{
$id = $this->_nextId++;
if ($locked || ($this->_backend === null) /* Use only memory locked objects if backend is not specified */) {
return new Zend_Memory_Container_Locked($value);
}
// Commit other objects modifications
$this->_commit();
$valueObject = new Zend_Memory_Container_Movable($this, $id, $value);
// Store last object size as 0
$this->_sizes[$id] = 0;
// prepare object for next modifications
$this->_lastModified = $valueObject;
return new Zend_Memory_AccessController($valueObject);
}
/**
* Unlink value container from memory manager
*
* Used by Memory container destroy() method
*
* @internal
* @param integer $id
* @return Zend_Memory_Container
*/
public function unlink(Zend_Memory_Container_Movable $container, $id)
{
if ($this->_lastModified === $container) {
// Drop all object modifications
$this->_lastModified = null;
unset($this->_sizes[$id]);
return;
}
if (isset($this->_unloadCandidates[$id])) {
unset($this->_unloadCandidates[$id]);
}
$this->_memorySize -= $this->_sizes[$id];
unset($this->_sizes[$id]);
}
/**
* Process value update
*
* @internal
* @param Zend_Memory_Container_Movable $container
* @param integer $id
*/
public function processUpdate(Zend_Memory_Container_Movable $container, $id)
{
/**
* This method is automatically invoked by memory container only once per
* "modification session", but user may call memory container touch() method
* several times depending on used algorithm. So we have to use this check
* to optimize this case.
*/
if ($container === $this->_lastModified) {
return;
}
// Remove just updated object from list of candidates to unload
if( isset($this->_unloadCandidates[$id])) {
unset($this->_unloadCandidates[$id]);
}
// Reduce used memory mark
$this->_memorySize -= $this->_sizes[$id];
// Commit changes of previously modified object if necessary
$this->_commit();
$this->_lastModified = $container;
}
/**
* Commit modified object and put it back to the loaded objects list
*/
private function _commit()
{
if (($container = $this->_lastModified) === null) {
return;
}
$this->_lastModified = null;
$id = $container->getId();
// Calculate new object size and increase used memory size by this value
$this->_memorySize += ($this->_sizes[$id] = strlen($container->getRef()));
if ($this->_sizes[$id] > $this->_minSize) {
// Move object to "unload candidates list"
$this->_unloadCandidates[$id] = $container;
}
$container->startTrace();
$this->_swapCheck();
}
/**
* Check and swap objects if necessary
*
* @throws Zend_MemoryException
*/
private function _swapCheck()
{
if ($this->_memoryLimit < 0 || $this->_memorySize < $this->_memoryLimit) {
// Memory limit is not reached
// Do nothing
return;
}
// walk through loaded objects in access history order
foreach ($this->_unloadCandidates as $id => $container) {
$this->_swap($container, $id);
unset($this->_unloadCandidates[$id]);
if ($this->_memorySize < $this->_memoryLimit) {
// We've swapped enough objects
return;
}
}
throw new Zend_Memory_Exception('Memory manager can\'t get enough space.');
}
/**
* Swap object data to disk
* Actualy swaps data or only unloads it from memory,
* if object is not changed since last swap
*
* @param Zend_Memory_Container_Movable $container
* @param integer $id
*/
private function _swap(Zend_Memory_Container_Movable $container, $id)
{
if ($container->isLocked()) {
return;
}
if (!$container->isSwapped()) {
$this->_backend->save($container->getRef(), $this->_managerId . $id, $this->_tags);
}
$this->_memorySize -= $this->_sizes[$id];
$container->markAsSwapped();
$container->unloadValue();
}
/**
* Load value from swap file.
*
* @internal
* @param Zend_Memory_Container_Movable $container
* @param integer $id
*/
public function load(Zend_Memory_Container_Movable $container, $id)
{
$value = $this->_backend->load($this->_managerId . $id, true);
// Try to swap other objects if necessary
// (do not include specified object into check)
$this->_memorySize += strlen($value);
$this->_swapCheck();
// Add loaded obect to the end of loaded objects list
$container->setValue($value);
if ($this->_sizes[$id] > $this->_minSize) {
// Add object to the end of "unload candidates list"
$this->_unloadCandidates[$id] = $container;
}
}
}
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