includes/libs/lockmanager/NullLockManager.php

   1 <?php
   2 /**
   3  * Resource locking handling.
   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 LockManager
  22  */
  23
  24 /**
  25  * Simple version of LockManager that only does lock reference counting
  26  * @since 1.19
  27  */
  28 class NullLockManager extends LockManager {
  29         protected function doLock( array $paths, $type ) {
  30                 foreach ( $paths as $path ) {
  31                         if ( isset( $this->locksHeld[$path][$type] ) ) {
  32                                 ++$this->locksHeld[$path][$type];
  33                         } else {
  34                                 $this->locksHeld[$path][$type] = 1;
  35                         }
  36                 }
  37
  38                 return StatusValue::newGood();
  39         }
  40
  41         protected function doUnlock( array $paths, $type ) {
  42                 $status = StatusValue::newGood();
  43
  44                 foreach ( $paths as $path ) {
  45                         if ( isset( $this->locksHeld[$path][$type] ) ) {
  46                                 if ( --$this->locksHeld[$path][$type] <= 0 ) {
  47                                         unset( $this->locksHeld[$path][$type] );
  48                                         if ( !$this->locksHeld[$path] ) {
  49                                                 unset( $this->locksHeld[$path] ); // clean up
  50                                         }
  51                                 }
  52                         } else {
  53                                 $status->warning( 'lockmanager-notlocked', $path );
  54                         }
  55                 }
  56
  57                 return $status;
  58         }
  59 }