1 files changed, 118 insertions, 0 deletions
diff --git a/www/wiki/includes/libs/objectcache/HashBagOStuff.php b/www/wiki/includes/libs/objectcache/HashBagOStuff.php
new file mode 100644
index 00000000..c6d357b5
--- /dev/null
+++ b/www/wiki/includes/libs/objectcache/HashBagOStuff.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Per-process memory cache for storing items.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Cache
+ */
+
+/**
+ * Simple store for keeping values in an associative array for the current process.
+ *
+ * Data will not persist and is not shared with other processes.
+ *
+ * @ingroup Cache
+ */
+class HashBagOStuff extends BagOStuff {
+	/** @var mixed[] */
+	protected $bag = [];
+	/** @var int Max entries allowed */
+	protected $maxCacheKeys;
+
+	const KEY_VAL = 0;
+	const KEY_EXP = 1;
+
+	/**
+	 * @param array $params Additional parameters include:
+	 *   - maxKeys : only allow this many keys (using oldest-first eviction)
+	 */
+	function __construct( $params = [] ) {
+		parent::__construct( $params );
+
+		$this->maxCacheKeys = isset( $params['maxKeys'] ) ? $params['maxKeys'] : INF;
+		if ( $this->maxCacheKeys <= 0 ) {
+			throw new InvalidArgumentException( '$maxKeys parameter must be above zero' );
+		}
+	}
+
+	protected function expire( $key ) {
+		$et = $this->bag[$key][self::KEY_EXP];
+		if ( $et == self::TTL_INDEFINITE || $et > $this->getCurrentTime() ) {
+			return false;
+		}
+
+		$this->delete( $key );
+
+		return true;
+	}
+
+	/**
+	 * Does this bag have a non-null value for the given key?
+	 *
+	 * @param string $key
+	 * @return bool
+	 * @since 1.27
+	 */
+	protected function hasKey( $key ) {
+		return isset( $this->bag[$key] );
+	}
+
+	protected function doGet( $key, $flags = 0 ) {
+		if ( !$this->hasKey( $key ) ) {
+			return false;
+		}
+
+		if ( $this->expire( $key ) ) {
+			return false;
+		}
+
+		// Refresh key position for maxCacheKeys eviction
+		$temp = $this->bag[$key];
+		unset( $this->bag[$key] );
+		$this->bag[$key] = $temp;
+
+		return $this->bag[$key][self::KEY_VAL];
+	}
+
+	public function set( $key, $value, $exptime = 0, $flags = 0 ) {
+		// Refresh key position for maxCacheKeys eviction
+		unset( $this->bag[$key] );
+		$this->bag[$key] = [
+			self::KEY_VAL => $value,
+			self::KEY_EXP => $this->convertExpiry( $exptime )
+		];
+
+		if ( count( $this->bag ) > $this->maxCacheKeys ) {
+			reset( $this->bag );
+			$evictKey = key( $this->bag );
+			unset( $this->bag[$evictKey] );
+		}
+
+		return true;
+	}
+
+	public function delete( $key ) {
+		unset( $this->bag[$key] );
+
+		return true;
+	}
+
+	public function clear() {
+		$this->bag = [];
+	}
+}