redesign of locking & caching

- New Factory "CacheDriverFactory" for Cache and Locks
- Adding Redis/Memcached Locking
- Moved Lock to Core
- other improvements

src/Core/Lock/AbstractLockDriver.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Friendica\Core\Lock;
+
+/**
+ * Class AbstractLockDriver
+ *
+ * @package Friendica\Core\Lock
+ *
+ * @brief Basic class for Locking with common functions (local acquired locks, releaseAll, ..)
+ */
+abstract class AbstractLockDriver implements ILockDriver
+{
+	/**
+	 * @var array The local acquired locks
+	 */
+	protected $acquiredLocks = [];
+
+	/**
+	 * @brief Check if we've locally acquired a lock
+	 *
+	 * @param string key The Name of the lock
+	 * @return bool      Returns true if the lock is set
+	 */
+	protected function hasAcquiredLock(string $key): bool {
+		return isset($this->acquireLock[$key]);
+	}
+
+	/**
+	 * @brief Mark a locally acquired lock
+	 *
+	 * @param string $key The Name of the lock
+	 */
+	protected function markAcquire(string $key) {
+		$this->acquiredLocks[$key] = true;
+	}
+
+	/**
+	 * @brief Mark a release of a locally acquired lock
+	 *
+	 * @param string $key The Name of the lock
+	 */
+	protected function markRelease(string $key) {
+		unset($this->acquiredLocks[$key]);
+	}
+
+	/**
+	 * @brief Releases all lock that were set by us
+	 *
+	 * @return void
+	 */
+	public function releaseAll() {
+		foreach ($this->acquiredLocks as $acquiredLock) {
+			$this->releaseLock($acquiredLock);
+		}
+	}
+}