includes/poolcounter/PoolCounterNull.php

   1 <?php
   2 /**
   3  * Provides of semaphore semantics for restricting the number
   4  * of workers that may be concurrently performing the same task.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  */
  23
  24 /**
  25  * A default PoolCounter, which provides no locking.
  26  */
  27 class PoolCounterNull extends PoolCounter {
  28
  29         public function __construct() {
  30                 /* No parameters needed */
  31         }
  32
  33         public function acquireForMe() {
  34                 return Status::newGood( PoolCounter::LOCKED );
  35         }
  36
  37         public function acquireForAnyone() {
  38                 return Status::newGood( PoolCounter::LOCKED );
  39         }
  40
  41         public function release() {
  42                 return Status::newGood( PoolCounter::RELEASED );
  43         }
  44 }