Memory/Manager.php

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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.

Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License
Package: Zend_Memory
Version: $Id$

\Zend_Memory_Manager
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Package: Zend_Memory

Memory manager

This class encapsulates memory menagement operations, when PHP works in limited memory mode.

Category: Zend
Copyright: Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License

Properties

\Zend_Cache_Backend_Interface $_backend = null

Object storage backend

Default valuenullDetails

Type: \Zend_Cache_Backend_Interface

\Zend_Memory_Container_Movable $_lastModified = null

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

Default valuenullDetails

Type: \Zend_Memory_Container_Movable

integer $_managerId

Unique memory manager id

Details

Type: integer

integer $_memoryLimit = -1

Memory grow limit.

Default value is 2/3 of memory_limit php.ini variable Negative value means no limit

Default value-1Details

Type: integer

integer $_memorySize = 0

Overall size of memory, used by values

Default value0Details

Type: integer

integer $_minSize = 16384

Minimum value size to be swapped.

Default value is 16K Negative value means that memory objects are never swapped

Default value16384Details

Type: integer

integer $_nextId = 0

Id for next Zend_Memory object

Default value0Details

Type: integer

array $_sizes = array()

List of object sizes.

This list is used to calculate modification of object sizes array( => , ...)

Default valuearray()Details

Type: array

array $_tags

Tags array, used by backend to categorize stored values

Details

Type: array

array $_unloadCandidates = array()

List of candidates to unload

It also represents objects access history. Last accessed objects are moved to the end of array array( => , ... )

Default valuearray()Details

Type: array

Methods

__construct(\Zend_Cache_Backend $backend = null) : void

Memory manager constructor

If backend is not specified, then memory objects are never swapped

Parameters

Name	Type	Description
$backend	\Zend_Cache_Backend

__destruct() : void

Object destructor

Clean up backend storage

_commit() : void

Commit modified object and put it back to the loaded objects list

_create(string $value, boolean $locked) : \Zend_Memory_Container_Interface

Create new Zend_Memory object

Parameters

Name	Type	Description
$value	string
$locked	boolean

Returns

Type	Description
\Zend_Memory_Container_Interface

Throws

Exception	Description
\Zend_Memory_Exception

_generateMemManagerId() : void

This function is intended to generate unique id, used by memory manager

_swap(\Zend_Memory_Container_Movable $container, integer $id) : void

Swap object data to disk Actualy swaps data or only unloads it from memory, if object is not changed since last swap

Parameters

Name	Type	Description
$container	\Zend_Memory_Container_Movable
$id	integer

_swapCheck() : void

Check and swap objects if necessary

Throws

Exception	Description
\Zend_MemoryException

create(string $value = '') : \Zend_Memory_Container_Interface

Create new Zend_Memory value container

Parameters

Name	Type	Description
$value	string

Returns

Type	Description
\Zend_Memory_Container_Interface

Throws

Exception	Description
\Zend_Memory_Exception

createLocked(string $value = '') : \Zend_Memory_Container_Interface

Create new Zend_Memory value container, which has value always locked in memory

Parameters

Name	Type	Description
$value	string

Returns

Type	Description
\Zend_Memory_Container_Interface

Throws

Exception	Description
\Zend_Memory_Exception

getMemoryLimit() : integer

Get memory grow limit

Returns

Type	Description
integer

getMinSize() : integer

Get minimum size of values, which may be swapped

Returns

Type	Description
integer

setMemoryLimit(integer $newLimit) : void

Set memory grow limit

Parameters

Name	Type	Description
$newLimit	integer

Throws

Exception	Description
\Zend_Exception

setMinSize(integer $newSize) : void

Set minimum size of values, which may be swapped

Parameters

Name	Type	Description
$newSize	integer

Memory/Manager.php

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Properties

Methods

\Zend_Memory_Manager
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