Re: [Boost-users] [intrusive_ptr] Counting implementation

From: Alexander Gutenev (gutenev_at_[hidden])
Date: 2008-07-30 18:02:58

Updated, after looking into other's implementation:

template<class Derived>
class intrusive_pointee_base
{
private:
  typedef intrusive_pointee_base self;

protected:
  intrusive_pointee_base(void) : reference_counter_(0) {}
  intrusive_pointee_base(self const&) : reference_counter_(0) {}
  intrusive_pointee_base operator=(self const&) { return *this }
  ~intrusive_pointee_base(void) {}

private:
  friend void intrusive_ptr_add_ref(const Derived * p)
  {
    ::InterlockedIncrement(&static_cast<self const 
*>(p)->reference_counter_);
  }

  friend void intrusive_ptr_release(const Derived * p)
  {
    if (!::InterlockedDecrement(&static_cast<self const 
*>(p)->reference_counter_))
      delete p;
  }

  mutable volatile long reference_counter_;
};