mirror of
https://github.com/ETLCPP/etl.git
synced 2026-04-30 19:09:10 +08:00
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
///\file
|
|
|
|
/******************************************************************************
|
|
The MIT License(MIT)
|
|
|
|
Embedded Template Library.
|
|
|
|
Copyright(c) 2014 jwellbelove
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files(the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions :
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
******************************************************************************/
|
|
|
|
#ifndef __ETL_INSTANCE_COUNT__
|
|
#define __ETL_INSTANCE_COUNT__
|
|
|
|
///\defgroup instance_count instance count
|
|
///\ingroup utilities
|
|
|
|
namespace etl
|
|
{
|
|
//***************************************************************************
|
|
/// Inherit from this to count instances of a type.
|
|
///\ingroup reference
|
|
//***************************************************************************
|
|
template <typename T>
|
|
class instance_count
|
|
{
|
|
public:
|
|
|
|
//*************************************************************************
|
|
/// Construct and add 1.
|
|
//*************************************************************************
|
|
instance_count()
|
|
{
|
|
++how_many;
|
|
}
|
|
|
|
//*************************************************************************
|
|
/// Destruct and subtract 1.
|
|
//*************************************************************************
|
|
virtual ~instance_count()
|
|
{
|
|
--how_many;
|
|
}
|
|
|
|
//*************************************************************************
|
|
/// Get how many instances we have.
|
|
//*************************************************************************
|
|
inline static size_t get_instance_count()
|
|
{
|
|
return how_many;
|
|
}
|
|
|
|
private:
|
|
|
|
/// The count for this type.
|
|
static size_t how_many;
|
|
};
|
|
|
|
/// Initialisation.
|
|
template <typename T> size_t instance_count<T>::how_many = 0;
|
|
}
|
|
|
|
#endif
|
|
|