hphp/runtime/base/dummy-resource.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    | Copyright (c) 1997-2010 The PHP Group                                |
   7    +----------------------------------------------------------------------+
   8    | This source file is subject to version 3.01 of the PHP license,      |
   9    | that is bundled with this package in the file LICENSE, and is        |
  10    | available through the world-wide-web at the following url:           |
  11    | http://www.php.net/license/3_01.txt                                  |
  12    | If you did not receive a copy of the PHP license and are unable to   |
  13    | obtain it through the world-wide-web, please send a note to          |
  14    | license@php.net so we can mail you a copy immediately.               |
  15    +----------------------------------------------------------------------+
  16 */
  17
  18 #ifndef incl_HPHP_DUMMY_RESOURCE_H_
  19 #define incl_HPHP_DUMMY_RESOURCE_H_
  20
  21 #include "hphp/runtime/base/resource-data.h"
  22 #include "hphp/runtime/base/type-string.h"
  23
  24 namespace HPHP {
  25 ///////////////////////////////////////////////////////////////////////////////
  26
  27 /**
  28  * DummyResource is used in a number of places where the runtime wants
  29  * to cast a value to the resource type. Ideally, casting a non-resource
  30  * value to a resource would throw or produce null, but there are a few
  31  * places in the runtime and the extensions that would need to be updated
  32  * first to make that work.
  33  */
  34 struct DummyResource : ResourceData {
  35   DECLARE_RESOURCE_ALLOCATION_NO_SWEEP(DummyResource);
  36   CLASSNAME_IS("Unknown");
  37   DummyResource();
  38   String m_class_name;
  39   const String& o_getClassNameHook() const override;
  40   bool isInvalid() const override { return m_class_name.empty(); }
  41   void o_setResourceId(int64_t id) { hdr()->setRawId(id); }
  42 };
  43
  44 ///////////////////////////////////////////////////////////////////////////////
  45 }
  46
  47 #endif