156 lines
4.7 KiB
C++
156 lines
4.7 KiB
C++
/*
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* CustomParameters.h
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*
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* Created on: 14 íîÿá. 2016 ã.
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* Author: Gorbunov_DV
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*/
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#ifndef SOURCE_SYSTEM_CUSTOMPARAMETERS_H_
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#define SOURCE_SYSTEM_CUSTOMPARAMETERS_H_
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#include "IParameterProvider.hh"
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#include <mutex>
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#include "SystemException.hh"
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namespace systemic {
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//!Ìîäóëü îñóùåòñâëÿþùèé äîñòóï ê ïàðàìåòðàì ñèñòåìû è äèíàìè÷åñêèì ñòðîêàì.
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class CustomParameters {
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private:
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IParameterProvider * * const providers; //!<Ìàññèâ èñòî÷íèêîâ ïàðàìåòðîâ.
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const std::size_t size; //!<Ðàçìåð ìàññèâà èñòî÷íèêîâ ïàðàìåòðîâ.
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public:
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typedef unsigned short ProviderId;
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typedef unsigned int Id;
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//!Ïîëó÷èòü ñòðîêó.
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/*!Âîçâðàùàåò ñòðîêó â ñëó÷àå åñëè îíà åñòü â çàäàííîì èñòî÷íèêå ïàðàìåòðîâ.
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*
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* \param[in] provider_id Èñòî÷íèê ïàðàìåòðîâ.
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* \param[in] parameter_id Èäåíòèôèêàòîð ñòðîêè.
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*
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* \return Óêàçàòåëü è ðàçìåð ñòðîêè, â ñëó÷àå îøèáêè - (nullptr, 0).
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*/
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SharedData getString( ProviderId provider_id, Id parameter_id ) const;
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/*!Ñîçäàòü ñòðîêó.
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*
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* \param[in] provider_id Èñòî÷íèê ïàðàìåòðîâ.
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* \param[in] parameter_id Èäåíòèôèêàòîð ñòðîêè.
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* \param[in] size Ðàçìåð ñòðîêè.
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*
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* \return Óêàçàòåëü è ðàçìåð ñòðîêè, â ñëó÷àå îøèáêè - (nullptr, 0).
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*/
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SharedData createString( ProviderId provider_id, Id parameter_id, std::size_t size);
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//!Ñèíõðîíèçèðîâàòü ñòðîêó â ÏÇÓ.
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/*!Ñèíõðîíèçèðóåò ñòðîêó â ñëó÷àå åñëè:
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* * óêàçàòåëü íà ñòðîêó íå èçìåíèëñÿ.
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* * ðàçìåð ñòðîêè íå èçìåíèëñÿ.
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* * äàííàÿ ñòðîêà ñóùåñòâóåò â çàäàííîì èñòî÷íèêå ïàðàìåòðîâ.
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*
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* \param[in] provider_id Èñòî÷íèê ïàðàìåòðîâ.
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* \param[in] parameter_id Èäåíòèôèêàòîð ñòðîêè.
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* \param[in] string Óêàçàòåëü è ðàçìåð ñòðîêè.
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* \return Ñòðîêà áóäåò ñèíõðîíèçèðîâàííà, èëè îøèáêà äîñòóïà.
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*/
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bool flushString( ProviderId provider_id, Id parameter_id, std::pair<const peripheral::protected_char *, std::size_t> string );
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//!Äîáàâèòü èñòî÷íèê ïàðàìåòðîâ ñ çàäàííûì èäåíòèôèêàòîðîì.
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bool addProvider( IParameterProvider * provider, ProviderId provider_id );
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CustomParameters( IParameterProvider * * providers, std::size_t size );
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};
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template<typename T>
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struct Parameter {
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SharedData data;
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operator bool() const;
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};
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template<typename T>
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struct LocalSetting {
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LocalSetting( Parameter<T> & );
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typename T::Setting & setting;
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std::lock_guard<SharedData> guard;
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};
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//!Âîçâðàùàåò óêàçàòåëü íà âàëèäíóþ ñòðóêòóðó íàñòðîåê, èëè nullptr.
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template<typename T>
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Parameter<T> getSetting( CustomParameters & cparams, CustomParameters::ProviderId provider_id, CustomParameters::Id id );
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//!Ïîëó÷åíèå ñòðîêè äàííûõ ïî èäåíòèôèêàòîðó.
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/*!Ãàðàíòèðóåò ÷òî äëÿ âñåõ âûçîâîâ ñ îäèíàêîâûìè id, provider_id, cparams, ìû ïîëó÷èì îäèíàêîâûå string.
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*
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*/
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bool getStringView( SharedData & string, const CustomParameters & cparams, CustomParameters::ProviderId provider_id, CustomParameters::Id id );
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//!Ñîçäàíèå ñòðîêè äàííûõ ïî èäåíòèôèêàòîðó.
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/*!Ãàðàíòèðóåò ÷òî äëÿ âñåõ âûçîâîâ ñ îäèíàêîâûìè id, provider_id, cparams, ìû ñîçäàäèì îäèíàêîâûå string.
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*
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*/
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bool createStringView( SharedData & string, CustomParameters & cparams, CustomParameters::ProviderId provider_id, std::size_t size, CustomParameters::Id id );
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template<std::size_t size>
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struct CustomParametersBox {
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IParameterProvider * records[size];
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CustomParameters manager;
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CustomParametersBox() :
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records(), manager( records, size ) {}
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};
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}
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//
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//struct InvalidSetting : public systemic::SystemException {
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//
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// struct Data {
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// systemic::CustomParameters::ProviderId provider_id;
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// systemic::CustomParameters::Id id;
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// } data;
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//
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// std::size_t id() const noexcept { return 97; }
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// std::pair<const char *, std::size_t> binary() const noexcept {
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// return std::make_pair<const char *, std::size_t>( reinterpret_cast<const char *>(&data), sizeof(Data) );
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// }
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//
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//};
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template<typename T>
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inline systemic::Parameter<T> systemic::getSetting( CustomParameters & cparams, CustomParameters::ProviderId provider_id, CustomParameters::Id id ) {
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systemic::Parameter<T> result;
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SharedData setting = cparams.getString( provider_id, id );
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if( setting.get().first )
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result.data = setting;
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return result;
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}
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template<typename T>
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inline systemic::Parameter<T>::operator bool() const {
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//todo: check alignof
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if( data.get().second == sizeof(typename T::Setting) )
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return LocalSetting<T>(const_cast<Parameter<T> &>(*this)).setting.isValid();
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return false;
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}
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template<typename T>
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inline systemic::LocalSetting<T>::LocalSetting( Parameter<T> & parameter ) :
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guard( parameter.data ), setting( *reinterpret_cast< typename T::Setting * >( parameter.data.get().first ) ) {}
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#endif /* SOURCE_SYSTEM_CUSTOMPARAMETERS_H_ */
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