hphp/runtime/vm/rclass-meth-data.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #pragma once
  18
  19 #include "hphp/runtime/base/array-data.h"
  20 #include "hphp/runtime/base/countable.h"
  21 #include "hphp/util/type-scan.h"
  22
  23 namespace HPHP {
  24
  25 struct Class;
  26 struct Func;
  27
  28 /**
  29  * Reified Class Method pointer
  30  */
  31 struct RClsMethData : Countable, type_scan::MarkCollectable<RClsMethData> {
  32   Class* m_cls;
  33   Func* m_func;
  34   ArrayData* m_arr;
  35
  36   RClsMethData(const RClsMethData&) = delete;
  37   RClsMethData& operator=(const RClsMethData&) = delete;
  38   ~RClsMethData() = delete;
  39
  40   static bool Same(const RClsMethData* rc1, const RClsMethData* rc2);
  41
  42   void release() noexcept;
  43
  44   bool kindIsValid() const;
  45
  46   static RClsMethData* create(Class* cls, Func* func, ArrayData* reified_generics);
  47
  48   ALWAYS_INLINE void decRefAndRelease() {
  49     assertx(kindIsValid());
  50     if (decReleaseCheck()) release();
  51   }
  52
  53   static constexpr ptrdiff_t clsOffset() {
  54     return offsetof(RClsMethData, m_cls);
  55   }
  56
  57   static constexpr ptrdiff_t funcOffset() {
  58     return offsetof(RClsMethData, m_func);
  59   }
  60
  61   static constexpr ptrdiff_t genericsOffset() {
  62     return offsetof(RClsMethData, m_arr);
  63   }
  64
  65 private:
  66   RClsMethData(Class* m_cls, Func* m_func, ArrayData* m_arr);
  67 };
  68
  69 ALWAYS_INLINE void decRefRClsMeth(RClsMethData* rc) {
  70   rc->decRefAndRelease();
  71 }
  72
  73 } // namespace HPHP
  74