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https://github.com/ETLCPP/etl.git
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512ab6338d
Changed std:: to ETLSTD:: macro to select std:: or etlstd:: depending on existence of ETL_NO_STL.
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2014 jwellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_INSTANCE_COUNT_INCLUDED
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#define ETL_INSTANCE_COUNT_INCLUDED
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#include <stdint.h>
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#include "platform.h"
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///\defgroup instance_count instance count
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///\ingroup utilities
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namespace etl
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{
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//***************************************************************************
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/// Inherit from this to count instances of a type.
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///\ingroup reference
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//***************************************************************************
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template <typename T>
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class instance_count
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{
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public:
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//*************************************************************************
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/// Construct and add 1.
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//*************************************************************************
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instance_count()
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{
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++how_many();
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}
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//*************************************************************************
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/// Copy construct and add 1.
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//*************************************************************************
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instance_count(const instance_count&)
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{
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++how_many();
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}
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//*************************************************************************
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/// Destruct and subtract 1.
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//*************************************************************************
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~instance_count()
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{
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--how_many();
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}
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//*************************************************************************
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/// Get how many instances we have.
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//*************************************************************************
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inline static int32_t get_instance_count()
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{
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return how_many();
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}
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//*************************************************************************
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/// Get how many instances we have.
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//*************************************************************************
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inline static void reset_instance_count()
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{
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how_many() = 0;
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}
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private:
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//*************************************************************************
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/// Get a referenceto the count.
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//*************************************************************************
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inline static int32_t& how_many()
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{
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static int32_t count = 0;
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return count;
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}
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};
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}
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#endif
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