includes/libs/objectcache/WinCacheBagOStuff.php

   1 <?php
   2 /**
   3  * Object caching using WinCache.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Cache
  22  */
  23
  24 /**
  25  * Wrapper for WinCache object caching functions; identical interface
  26  * to the APC wrapper
  27  *
  28  * @ingroup Cache
  29  */
  30 class WinCacheBagOStuff extends BagOStuff {
  31         protected function doGet( $key, $flags = 0 ) {
  32                 $casToken = null;
  33
  34                 return $this->getWithToken( $key, $casToken, $flags );
  35         }
  36
  37         protected function getWithToken( $key, &$casToken, $flags = 0 ) {
  38                 $val = wincache_ucache_get( $key );
  39
  40                 $casToken = $val;
  41
  42                 if ( is_string( $val ) ) {
  43                         $val = unserialize( $val );
  44                 }
  45
  46                 return $val;
  47         }
  48
  49         public function set( $key, $value, $expire = 0, $flags = 0 ) {
  50                 $result = wincache_ucache_set( $key, serialize( $value ), $expire );
  51
  52                 /* wincache_ucache_set returns an empty array on success if $value
  53                    was an array, bool otherwise */
  54                 return ( is_array( $result ) && $result === [] ) || $result;
  55         }
  56
  57         protected function cas( $casToken, $key, $value, $exptime = 0 ) {
  58                 return wincache_ucache_cas( $key, $casToken, serialize( $value ) );
  59         }
  60
  61         public function delete( $key ) {
  62                 wincache_ucache_delete( $key );
  63
  64                 return true;
  65         }
  66
  67         public function merge( $key, callable $callback, $exptime = 0, $attempts = 10, $flags = 0 ) {
  68                 if ( wincache_lock( $key ) ) { // optimize with FIFO lock
  69                         $ok = $this->mergeViaLock( $key, $callback, $exptime, $attempts, $flags );
  70                         wincache_unlock( $key );
  71                 } else {
  72                         $ok = false;
  73                 }
  74
  75                 return $ok;
  76         }
  77 }