.. _program_listing_file_src_utils_UniqueIDManager.hpp:

Program Listing for File UniqueIDManager.hpp
============================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_utils_UniqueIDManager.hpp>` (``src/utils/UniqueIDManager.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   
   #ifndef UNIQUEIDMANAGER_HPP
   #define UNIQUEIDMANAGER_HPP
   
   #include "MPIUtils.hpp"
   
   namespace utils {
   
       class UniqueIDManager {
   
       public:
   
           UniqueIDManager() : uniqueID_(static_cast<unsigned long>(mpiRank()) * mpiUidStride) { }
   
           ~UniqueIDManager() = default;
   
           // Disable copy and move constructors and assignment operators,
           // since this class is meant to be used only via a single,
           // shared instance
           UniqueIDManager(const UniqueIDManager&) = delete;
           UniqueIDManager(UniqueIDManager&&) = delete;
           auto operator=(const UniqueIDManager&) -> UniqueIDManager& = delete;
           auto operator=(UniqueIDManager&&) -> UniqueIDManager& = delete;
   
           [[nodiscard]] auto get() -> unsigned long
           {
               unsigned long id{};
   #ifdef _OPENMP
   #pragma omp atomic capture
   #endif
               { id = uniqueID_; uniqueID_++; }
               return id;
           }
   
           void set(const unsigned long value)
           {
   #ifdef _OPENMP
   #pragma omp atomic write
   #endif
               uniqueID_ = value;
           }
   
           [[nodiscard]] auto read() const -> unsigned long
           {
               unsigned long id{};
   #ifdef _OPENMP
   #pragma omp atomic read
   #endif
               id = uniqueID_;
               return id;
           }
   
       private:
   
           unsigned long uniqueID_; 
       };
   
       inline auto uniqueID() -> UniqueIDManager&
       {
           static UniqueIDManager instance;
           return instance;
       }
   
   } // namespace utils
   
   #endif // UNIQUEIDMANAGER_HPP