ReferenceCounter.h

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//     ____   ______ __
//    / __ \ / ____// /
//   / /_/ // /    / /
//  / ____// /___ / /___   PixInsight Class Library
// /_/     \____//_____/   PCL 2.7.0
// ----------------------------------------------------------------------------
// pcl/ReferenceCounter.h - Released 2024-06-18T15:48:54Z
// ----------------------------------------------------------------------------
// This file is part of the PixInsight Class Library (PCL).
// PCL is a multiplatform C++ framework for development of PixInsight modules.
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// ----------------------------------------------------------------------------
 
#ifndef __PCL_ReferenceCounter_h
#define __PCL_ReferenceCounter_h
 
 
#include <pcl/Defs.h>
 
#include <pcl/Atomic.h>
 
#ifdef __PCL_REFCOUNT_CHECK_DETACHMENT
#  include <pcl/Exception.h>
#else
#  include <pcl/Diagnostics.h>
#endif
 
namespace pcl
{
 
// ----------------------------------------------------------------------------
 
class PCL_CLASS ReferenceCounter
{
public:
 
   ReferenceCounter() = default;
 
   ~ReferenceCounter()
   {
   }
 
   ReferenceCounter( const ReferenceCounter& )
      : ReferenceCounter()
   {
   }
 
   ReferenceCounter& operator =( const ReferenceCounter& ) = delete;
 
   void Attach()
   {
      m_count.Increment();
   }
 
   bool Detach()
   {
      PCL_CHECK( m_count.Load() > 0 )
      return m_count.Dereference();
   }
 
   int RefCount() const
   {
      return m_count;
   }
 
   int RefCountAtomic() const
   {
      return m_count.Load();
   }
 
   bool IsUnique() const
   {
      return RefCount() < 2;
   }
 
   bool IsUniqueAtomic() const
   {
      return RefCountAtomic() < 2;
   }
 
private:
 
   mutable AtomicInt m_count = 1;
};
 
// ----------------------------------------------------------------------------
 
} // pcl
 
#endif  // __PCL_ReferenceCounter_h
 
// ----------------------------------------------------------------------------
// EOF pcl/ReferenceCounter.h - Released 2024-06-18T15:48:54Z