instance_count.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2014 John Wellbelove
 
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of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
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******************************************************************************/
 
#ifndef ETL_INSTANCE_COUNT_INCLUDED
#define ETL_INSTANCE_COUNT_INCLUDED
 
#include "platform.h"
 
#include <stdint.h>

 
namespace etl
{
  //***************************************************************************
  //***************************************************************************
  template <typename T, typename TCounter = int32_t>
  class instance_count
  {
  public:
 
    typedef T        type;
    typedef TCounter counter_type;
 
    //*************************************************************************
    //*************************************************************************
    instance_count()
    {
      ++current_instance_count();
    }
 
    //*************************************************************************
    //*************************************************************************
    instance_count(const instance_count&)
    {
      ++current_instance_count();
    }
 
    //*************************************************************************
    //*************************************************************************
    instance_count& operator=(const instance_count&)
    {
      return *this;
    }
 
    //*************************************************************************
    //*************************************************************************
    ~instance_count()
    {
      --current_instance_count();
    }
 
    //*************************************************************************
    //*************************************************************************
    static const counter_type& get_instance_count()
    {
      return current_instance_count();
    }
 
    //*************************************************************************
    //*************************************************************************
    static void reset_instance_count()
    {
      current_instance_count() = 0;
    }
 
  private:
 
    //*************************************************************************
    //*************************************************************************
    static counter_type& current_instance_count()
    {
      static counter_type counter = {0};
      return counter;
    }
  };
} // namespace etl
 
#endif