TAO/tao/Intrusive_Ref_Count_Base_T.h

   1 // -*- C++ -*-
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Intrusive_Ref_Count_Base_T.h
   6  *
   7  *  @authors Tim Bradley  <bradley_t@ociweb.com>
   8  */
   9 //=============================================================================
  10
  11 #ifndef TAO_INTRUSIVE_REF_COUNT_BASE_T_H
  12 #define TAO_INTRUSIVE_REF_COUNT_BASE_T_H
  13
  14 #include /**/ "ace/pre.h"
  15
  16 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  17 # pragma once
  18 #endif /* ACE_LACKS_PRAGMA_ONCE */
  19
  20 #include /**/ "tao/Versioned_Namespace.h"
  21
  22 #include "tao/Basic_Types.h"
  23 #include <atomic>
  24
  25 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  26
  27 /**
  28  * @class TAO_Intrusive_Ref_Count_Base<ACE_LOCK>
  29  *
  30  * @brief Template base class to provide intrusive reference-counting
  31  *        to subclasses.  This makes the subclass capable of using a
  32  *        TAO_Intrusive_Ref_Count_Handle<X> class as a smart-pointer
  33  *        to an X object.  In this case, X is a sub-class of this class,
  34  *        TAO_Intrusive_Ref_Count_Base<ACE_LOCK>.  The ACE_LOCK type is
  35  *        used to protect the atomic reference count data member.
  36  */
  37 template <class ACE_LOCK>
  38 class TAO_Intrusive_Ref_Count_Base
  39 {
  40 public:
  41   virtual ~TAO_Intrusive_Ref_Count_Base ();
  42
  43   void _add_ref ();
  44   void _remove_ref ();
  45
  46 protected:
  47   TAO_Intrusive_Ref_Count_Base ();
  48
  49 private:
  50     std::atomic<uint32_t> refcount_;
  51
  52   // Prevent copying/assignment.
  53   TAO_Intrusive_Ref_Count_Base (const TAO_Intrusive_Ref_Count_Base&);
  54   TAO_Intrusive_Ref_Count_Base& operator= (const TAO_Intrusive_Ref_Count_Base&);
  55 };
  56
  57 TAO_END_VERSIONED_NAMESPACE_DECL
  58
  59 #if defined (__ACE_INLINE__)
  60 #include "tao/Intrusive_Ref_Count_Base_T.inl"
  61 #endif /* __ACE_INLINE__ */
  62
  63 #include "tao/Intrusive_Ref_Count_Base_T.cpp"
  64
  65 #include /**/ "ace/post.h"
  66
  67 #endif /* TAO_INTRUSIVE_REF_COUNT_BASE_T_H */