Gabriele Cosmo
130 lines
4.6 KiB
C++
130 lines
4.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// ---------------------------------------------------------------
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// GEANT4 template class header
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// Class Description:
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// This class delegates which singletons a task references
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// ---------------------------------------------------------------
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// Author: Jonathan Madsen
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// ---------------------------------------------------------------
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#include "G4AutoLock.hh"
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#include "G4Threading.hh"
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#include <functional>
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#include <map>
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#include <memory>
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#include <set>
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#include <thread>
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#include <tuple>
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#include <type_traits>
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#include <vector>
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namespace G4Traits
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{
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template <typename T>
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struct TaskSingletonKey
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{
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using type = G4int;
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using compare_type = std::less<type>;
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};
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}
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// ------------------------------------------------------------------------------------ //
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/// \class G4TaskSingletonEvaluator
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/// \brief This structure must be specialized and use overloads to the constructor
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///
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template <typename T>
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struct G4TaskSingletonEvaluator;
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// ------------------------------------------------------------------------------------ //
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template <typename T>
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class G4TaskSingletonDelegator;
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// ------------------------------------------------------------------------------------ //
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template <typename T>
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class G4TaskSingletonData
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{
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using key_type = typename G4Traits::TaskSingletonKey<T>::type;
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using compare_type = typename G4Traits::TaskSingletonKey<T>::compare_type;
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friend struct G4TaskSingletonEvaluator<T>;
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friend class G4TaskSingletonDelegator<T>;
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using this_type = G4TaskSingletonData<T>;
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private:
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static std::unique_ptr<this_type>& GetInstance()
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{
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static auto _instance = std::unique_ptr<this_type>(new this_type);
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return _instance;
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}
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private:
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std::map<key_type, T*, compare_type> m_data;
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};
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// ------------------------------------------------------------------------------------ //
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template <typename T>
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struct G4TaskSingletonEvaluator
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{
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using key_type = typename G4Traits::TaskSingletonKey<T>::type;
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using data_type = G4TaskSingletonData<T>;
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template <typename... Args>
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G4TaskSingletonEvaluator(key_type&, Args&&...)
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{
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throw std::runtime_error("Not specialized!");
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}
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};
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// ------------------------------------------------------------------------------------ //
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template <typename T>
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class G4TaskSingletonDelegator
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{
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public:
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using pointer = T*;
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using evaluator_type = G4TaskSingletonEvaluator<T>;
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using data_type = G4TaskSingletonData<T>;
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using key_type = typename G4Traits::TaskSingletonKey<T>;
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template <typename... Args>
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static void Configure(Args&&... args)
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{
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auto& _data = data_type::GetInstance();
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evaluator_type _eval(std::forward<Args>(args)...);
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auto _ptr = _data->m_data.at(_eval.index);
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_eval.modifier(_ptr);
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T::SetInstance(_data->m_data.at(_key));
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}
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};
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// ------------------------------------------------------------------------------------ //
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