--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ClassLoader;
+
+/**
+ * WinCacheClassLoader implements a wrapping autoloader cached in WinCache.
+ *
+ * It expects an object implementing a findFile method to find the file. This
+ * allow using it as a wrapper around the other loaders of the component (the
+ * ClassLoader and the UniversalClassLoader for instance) but also around any
+ * other autoloaders following this convention (the Composer one for instance).
+ *
+ * // with a Symfony autoloader
+ * use Symfony\Component\ClassLoader\ClassLoader;
+ *
+ * $loader = new ClassLoader();
+ * $loader->addPrefix('Symfony\Component', __DIR__.'/component');
+ * $loader->addPrefix('Symfony', __DIR__.'/framework');
+ *
+ * // or with a Composer autoloader
+ * use Composer\Autoload\ClassLoader;
+ *
+ * $loader = new ClassLoader();
+ * $loader->add('Symfony\Component', __DIR__.'/component');
+ * $loader->add('Symfony', __DIR__.'/framework');
+ *
+ * $cachedLoader = new WinCacheClassLoader('my_prefix', $loader);
+ *
+ * // activate the cached autoloader
+ * $cachedLoader->register();
+ *
+ * // eventually deactivate the non-cached loader if it was registered previously
+ * // to be sure to use the cached one.
+ * $loader->unregister();
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Kris Wallsmith <kris@symfony.com>
+ * @author Artem Ryzhkov <artem@smart-core.org>
+ */
+class WinCacheClassLoader
+{
+ private $prefix;
+
+ /**
+ * A class loader object that implements the findFile() method.
+ *
+ * @var object
+ */
+ protected $decorated;
+
+ /**
+ * Constructor.
+ *
+ * @param string $prefix The WinCache namespace prefix to use
+ * @param object $decorated A class loader object that implements the findFile() method
+ *
+ * @throws \RuntimeException
+ * @throws \InvalidArgumentException
+ */
+ public function __construct($prefix, $decorated)
+ {
+ if (!extension_loaded('wincache')) {
+ throw new \RuntimeException('Unable to use WinCacheClassLoader as WinCache is not enabled.');
+ }
+
+ if (!method_exists($decorated, 'findFile')) {
+ throw new \InvalidArgumentException('The class finder must implement a "findFile" method.');
+ }
+
+ $this->prefix = $prefix;
+ $this->decorated = $decorated;
+ }
+
+ /**
+ * Registers this instance as an autoloader.
+ *
+ * @param bool $prepend Whether to prepend the autoloader or not
+ */
+ public function register($prepend = false)
+ {
+ spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+ }
+
+ /**
+ * Unregisters this instance as an autoloader.
+ */
+ public function unregister()
+ {
+ spl_autoload_unregister(array($this, 'loadClass'));
+ }
+
+ /**
+ * Loads the given class or interface.
+ *
+ * @param string $class The name of the class
+ *
+ * @return bool|null True, if loaded
+ */
+ public function loadClass($class)
+ {
+ if ($file = $this->findFile($class)) {
+ require $file;
+
+ return true;
+ }
+ }
+
+ /**
+ * Finds a file by class name while caching lookups to WinCache.
+ *
+ * @param string $class A class name to resolve to file
+ *
+ * @return string|null
+ */
+ public function findFile($class)
+ {
+ $file = wincache_ucache_get($this->prefix.$class, $success);
+
+ if (!$success) {
+ wincache_ucache_set($this->prefix.$class, $file = $this->decorated->findFile($class) ?: null, 0);
+ }
+
+ return $file;
+ }
+
+ /**
+ * Passes through all unknown calls onto the decorated object.
+ */
+ public function __call($method, $args)
+ {
+ return call_user_func_array(array($this->decorated, $method), $args);
+ }
+}