includes/libs/lockmanager/NullLockManager.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  */
  20
  21 /**
  22  * Simple lock management based on in-process reference counting.
  23  *
  24  * @since 1.19
  25  * @ingroup LockManager
  26  */
  27 class NullLockManager extends LockManager {
  28         protected function doLock( array $paths, $type ) {
  29                 foreach ( $paths as $path ) {
  30                         if ( isset( $this->locksHeld[$path][$type] ) ) {
  31                                 ++$this->locksHeld[$path][$type];
  32                         } else {
  33                                 $this->locksHeld[$path][$type] = 1;
  34                         }
  35                 }
  36
  37                 return StatusValue::newGood();
  38         }
  39
  40         protected function doUnlock( array $paths, $type ) {
  41                 $status = StatusValue::newGood();
  42
  43                 foreach ( $paths as $path ) {
  44                         if ( isset( $this->locksHeld[$path][$type] ) ) {
  45                                 if ( --$this->locksHeld[$path][$type] <= 0 ) {
  46                                         unset( $this->locksHeld[$path][$type] );
  47                                         if ( !$this->locksHeld[$path] ) {
  48                                                 unset( $this->locksHeld[$path] ); // clean up
  49                                         }
  50                                 }
  51                         } else {
  52                                 $status->warning( 'lockmanager-notlocked', $path );
  53                         }
  54                 }
  55
  56                 return $status;
  57         }
  58 }