3192278eb2
Also make sure they always use PHP serialization to avoid CAS token problems and bugs in the custom pecl extension serializers. Change-Id: I43cef97ca4ac0f0cc21b65ba73d1887ed92e157f
95 lines
2.7 KiB
PHP
95 lines
2.7 KiB
PHP
<?php
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/**
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* Object caching using PHP's APC accelerator.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Cache
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*/
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/**
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* This is a wrapper for APC's shared memory functions
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*
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* Use PHP serialization to avoid bugs and easily create CAS tokens.
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* APCu has a memory corruption bug when the serializer is set to 'default'.
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* See T120267, and upstream bug reports:
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* - https://github.com/krakjoe/apcu/issues/38
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* - https://github.com/krakjoe/apcu/issues/35
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* - https://github.com/krakjoe/apcu/issues/111
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*
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* @ingroup Cache
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*/
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class APCBagOStuff extends BagOStuff {
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/**
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* @var string String to append to each APC key. This may be changed
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* whenever the handling of values is changed, to prevent existing code
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* from encountering older values which it cannot handle.
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*/
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const KEY_SUFFIX = ':3';
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protected function doGet( $key, $flags = 0, &$casToken = null ) {
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$casToken = null;
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$blob = apc_fetch( $key . self::KEY_SUFFIX );
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$value = $this->unserialize( $blob );
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if ( $value !== false ) {
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$casToken = $blob; // don't bother hashing this
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}
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return $value;
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}
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public function set( $key, $value, $exptime = 0, $flags = 0 ) {
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apc_store(
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$key . self::KEY_SUFFIX,
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$this->serialize( $value ),
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$exptime
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);
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return true;
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}
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public function add( $key, $value, $exptime = 0, $flags = 0 ) {
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return apc_add(
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$key . self::KEY_SUFFIX,
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$this->serialize( $value ),
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$exptime
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);
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}
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public function delete( $key, $flags = 0 ) {
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apc_delete( $key . self::KEY_SUFFIX );
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return true;
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}
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public function incr( $key, $value = 1 ) {
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return apc_inc( $key . self::KEY_SUFFIX, $value );
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}
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public function decr( $key, $value = 1 ) {
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return apc_dec( $key . self::KEY_SUFFIX, $value );
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}
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protected function serialize( $value ) {
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return $this->isInteger( $value ) ? (int)$value : serialize( $value );
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}
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protected function unserialize( $value ) {
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return $this->isInteger( $value ) ? (int)$value : unserialize( $value );
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}
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}
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