hphp/runtime/vm/class-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/countable.h"
  20 #include "hphp/util/type-scan.h"
  21 #include "hphp/util/low-ptr.h"
  22
  23 namespace HPHP {
  24
  25 struct Class;
  26 struct Func;
  27
  28 // TODO (T39025604) optimize this class for LOW_PTR build
  29 struct ClsMethData : Countable, type_scan::MarkScannableCollectable<ClsMethData>
  30 {
  31
  32   static ClsMethData* make(Class* cls, Func* func);
  33
  34   void release() noexcept;
  35
  36   ALWAYS_INLINE void decRefAndRelease() {
  37     assertx(validate());
  38     if (decReleaseCheck()) {
  39       release();
  40     }
  41   }
  42
  43   bool validate() const;
  44
  45   Class* getCls() const {
  46     return m_cls;
  47   }
  48
  49   Func* getFunc() const {
  50     return m_func;
  51   }
  52
  53   static constexpr ptrdiff_t clsOffset() {
  54     return offsetof(ClsMethData, m_cls);
  55   }
  56
  57   static constexpr ptrdiff_t funcOffset() {
  58     return offsetof(ClsMethData, m_func);
  59   }
  60
  61 private:
  62   ClsMethData(Class* cls, Func* func);
  63
  64   LowPtr<Class> m_cls;
  65   LowPtr<Func> m_func;
  66 };
  67
  68 } // namespace HPHP