6e9b4f0e9c
Per wikitech-l consensus: https://lists.wikimedia.org/pipermail/wikitech-l/2016-February/084821.html Notes: * Disabled CallTimePassByReference due to false positives (T127163) Change-Id: I2c8ce713ce6600a0bb7bf67537c87044c7a45c4b
112 lines
3.3 KiB
PHP
112 lines
3.3 KiB
PHP
<?php
|
|
/**
|
|
* Object caching using PHP's APC accelerator.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
* http://www.gnu.org/copyleft/gpl.html
|
|
*
|
|
* @file
|
|
* @ingroup Cache
|
|
*/
|
|
|
|
/**
|
|
* This is a wrapper for APC's shared memory functions
|
|
*
|
|
* @ingroup Cache
|
|
*/
|
|
class APCBagOStuff extends BagOStuff {
|
|
|
|
/**
|
|
* @var bool If true, trust the APC implementation to serialize and
|
|
* deserialize objects correctly. If false, (de-)serialize in PHP.
|
|
*/
|
|
protected $nativeSerialize;
|
|
|
|
/**
|
|
* @var string String to append to each APC key. This may be changed
|
|
* whenever the handling of values is changed, to prevent existing code
|
|
* from encountering older values which it cannot handle.
|
|
*/
|
|
const KEY_SUFFIX = ':2';
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* Available parameters are:
|
|
* - nativeSerialize: If true, pass objects to apc_store(), and trust it
|
|
* to serialize them correctly. If false, serialize
|
|
* all values in PHP.
|
|
*
|
|
* @param array $params
|
|
*/
|
|
public function __construct( array $params = [] ) {
|
|
parent::__construct( $params );
|
|
|
|
if ( isset( $params['nativeSerialize'] ) ) {
|
|
$this->nativeSerialize = $params['nativeSerialize'];
|
|
} elseif ( extension_loaded( 'apcu' ) && ini_get( 'apc.serializer' ) === 'default' ) {
|
|
// APCu has a memory corruption bug when the serializer is set to 'default'.
|
|
// See T120267, and upstream bug reports:
|
|
// - https://github.com/krakjoe/apcu/issues/38
|
|
// - https://github.com/krakjoe/apcu/issues/35
|
|
// - https://github.com/krakjoe/apcu/issues/111
|
|
$this->logger->warning(
|
|
'The APCu extension is loaded and the apc.serializer INI setting ' .
|
|
'is set to "default". This can cause memory corruption! ' .
|
|
'You should change apc.serializer to "php" instead. ' .
|
|
'See <https://github.com/krakjoe/apcu/issues/38>.'
|
|
);
|
|
$this->nativeSerialize = false;
|
|
} else {
|
|
$this->nativeSerialize = true;
|
|
}
|
|
}
|
|
|
|
protected function doGet( $key, $flags = 0 ) {
|
|
$val = apc_fetch( $key . self::KEY_SUFFIX );
|
|
|
|
if ( is_string( $val ) && !$this->nativeSerialize ) {
|
|
$val = $this->isInteger( $val )
|
|
? intval( $val )
|
|
: unserialize( $val );
|
|
}
|
|
|
|
return $val;
|
|
}
|
|
|
|
public function set( $key, $value, $exptime = 0, $flags = 0 ) {
|
|
if ( !$this->nativeSerialize && !$this->isInteger( $value ) ) {
|
|
$value = serialize( $value );
|
|
}
|
|
|
|
apc_store( $key . self::KEY_SUFFIX, $value, $exptime );
|
|
|
|
return true;
|
|
}
|
|
|
|
public function delete( $key ) {
|
|
apc_delete( $key . self::KEY_SUFFIX );
|
|
|
|
return true;
|
|
}
|
|
|
|
public function incr( $key, $value = 1 ) {
|
|
return apc_inc( $key . self::KEY_SUFFIX, $value );
|
|
}
|
|
|
|
public function decr( $key, $value = 1 ) {
|
|
return apc_dec( $key . self::KEY_SUFFIX, $value );
|
|
}
|
|
}
|