debug_count.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2017 John Wellbelove
 
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#ifndef ETL_DEBUG_COUNT_INCLUDED
#define ETL_DEBUG_COUNT_INCLUDED
 
#include "platform.h"
#include "atomic.h"
 
#include <assert.h>
#include <stdint.h>
 
 
#if defined(ETL_DEBUG_COUNT)
 
  #define ETL_DECLARE_DEBUG_COUNT              etl::debug_count etl_debug_count
  #define ETL_SET_DEBUG_COUNT(n)               etl_debug_count.set(n)
  #define ETL_GET_DEBUG_COUNT                  etl_debug_count.get()
  #define ETL_INCREMENT_DEBUG_COUNT            ++etl_debug_count
  #define ETL_DECREMENT_DEBUG_COUNT            --etl_debug_count
  #define ETL_ADD_DEBUG_COUNT(n)               etl_debug_count += (n)
  #define ETL_SUBTRACT_DEBUG_COUNT(n)          etl_debug_count -= (n)
  #define ETL_RESET_DEBUG_COUNT                etl_debug_count.clear()
  #define ETL_OBJECT_RESET_DEBUG_COUNT(object) object.etl_debug_count.clear()
  #define ETL_OBJECT_GET_DEBUG_COUNT(object)   object.etl_debug_count.get()
 
namespace etl
{
  //***************************************************************************
  //***************************************************************************
  class debug_count
  {
  public:
    debug_count()
      : count(0)
    {
    }
 
    ~debug_count()
    {
      assert(count == 0);
    }
 
    debug_count& operator++()
    {
      ++count;
      return *this;
    }
 
    debug_count& operator--()
    {
      --count;
      assert(count >= 0);
      return *this;
    }
 
    template <typename T>
    debug_count& operator+=(T n)
    {
      count += int32_t(n);
      return *this;
    }
 
    template <typename T>
    debug_count& operator-=(T n)
    {
      count -= int32_t(n);
      return *this;
    }
 
    debug_count& operator=(const debug_count& other)
    {
      count.store(other.count.load());
 
      return *this;
    }
 
  #if ETL_HAS_ATOMIC
    void swap(debug_count& other) ETL_NOEXCEPT  // NOT ATOMIC
    {
      int32_t temp = other.count.load();
      other.count.store(count.load());
      count.store(temp);
    }
  #else
    void swap(debug_count& other) ETL_NOEXCEPT
    {
      swap(count, other.count);
    }
  #endif
 
    operator int32_t() const
    {
      return count;
    }
 
    int32_t get() const
    {
      return int32_t(count);
    }
 
    void set(int32_t n)
    {
      count = n;
    }
 
    void clear()
    {
      count = 0;
    }
 
  private:
  #if ETL_HAS_ATOMIC
    etl::atomic_int32_t count;
  #else
    int32_t count;
  #endif
  };
}  // namespace etl
 
inline void swap(etl::debug_count& lhs, etl::debug_count& rhs)
{
  lhs.swap(rhs);
}
 
#else
  #define ETL_DECLARE_DEBUG_COUNT
  #define ETL_SET_DEBUG_COUNT(n)
  #define ETL_GET_DEBUG_COUNT
  #define ETL_INCREMENT_DEBUG_COUNT
  #define ETL_DECREMENT_DEBUG_COUNT
  #define ETL_ADD_DEBUG_COUNT(n)
  #define ETL_SUBTRACT_DEBUG_COUNT(n)
  #define ETL_RESET_DEBUG_COUNT
  #define ETL_OBJECT_RESET_DEBUG_COUNT(object)
  #define ETL_OBJECT_GET_DEBUG_COUNT(object)
#endif  // ETL_DEBUG_COUNT
 
#endif