Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Transaction/MultiExecState.php

@@ -0,0 +1,166 @@
+<?php
+
+/*
+ * This file is part of the Predis package.
+ *
+ * (c) Daniele Alessandri <suppakilla@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Predis\Transaction;
+
+/**
+ * Utility class used to track the state of a MULTI / EXEC transaction.
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class MultiExecState
+{
+    const INITIALIZED = 1;    // 0b00001
+    const INSIDEBLOCK = 2;    // 0b00010
+    const DISCARDED   = 4;    // 0b00100
+    const CAS         = 8;    // 0b01000
+    const WATCH       = 16;   // 0b10000
+
+    private $flags;
+
+    /**
+     *
+     */
+    public function __construct()
+    {
+        $this->flags = 0;
+    }
+
+    /**
+     * Sets the internal state flags.
+     *
+     * @param int $flags Set of flags
+     */
+    public function set($flags)
+    {
+        $this->flags = $flags;
+    }
+
+    /**
+     * Gets the internal state flags.
+     *
+     * @return int
+     */
+    public function get()
+    {
+        return $this->flags;
+    }
+
+    /**
+     * Sets one or more flags.
+     *
+     * @param int $flags Set of flags
+     */
+    public function flag($flags)
+    {
+        $this->flags |= $flags;
+    }
+
+    /**
+     * Resets one or more flags.
+     *
+     * @param int $flags Set of flags
+     */
+    public function unflag($flags)
+    {
+        $this->flags &= ~$flags;
+    }
+
+    /**
+     * Returns if the specified flag or set of flags is set.
+     *
+     * @param int $flags Flag
+     *
+     * @return bool
+     */
+    public function check($flags)
+    {
+        return ($this->flags & $flags) === $flags;
+    }
+
+    /**
+     * Resets the state of a transaction.
+     */
+    public function reset()
+    {
+        $this->flags = 0;
+    }
+
+    /**
+     * Returns the state of the RESET flag.
+     *
+     * @return bool
+     */
+    public function isReset()
+    {
+        return $this->flags === 0;
+    }
+
+    /**
+     * Returns the state of the INITIALIZED flag.
+     *
+     * @return bool
+     */
+    public function isInitialized()
+    {
+        return $this->check(self::INITIALIZED);
+    }
+
+    /**
+     * Returns the state of the INSIDEBLOCK flag.
+     *
+     * @return bool
+     */
+    public function isExecuting()
+    {
+        return $this->check(self::INSIDEBLOCK);
+    }
+
+    /**
+     * Returns the state of the CAS flag.
+     *
+     * @return bool
+     */
+    public function isCAS()
+    {
+        return $this->check(self::CAS);
+    }
+
+    /**
+     * Returns if WATCH is allowed in the current state.
+     *
+     * @return bool
+     */
+    public function isWatchAllowed()
+    {
+        return $this->check(self::INITIALIZED) && !$this->check(self::CAS);
+    }
+
+    /**
+     * Returns the state of the WATCH flag.
+     *
+     * @return bool
+     */
+    public function isWatching()
+    {
+        return $this->check(self::WATCH);
+    }
+
+    /**
+     * Returns the state of the DISCARDED flag.
+     *
+     * @return bool
+     */
+    public function isDiscarded()
+    {
+        return $this->check(self::DISCARDED);
+    }
+}