File deriv_store.hxx¶

Definition of derivative methods storage class

This file is part of BOUT++.

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template<typename FieldType> struct DerivativeStore¶

#include <deriv_store.hxx>

Here we have a templated singleton that is used to store DerivativeFunctions for all types of derivatives. It is templated on the FieldType (2D or 3D) as the function interfaces also depend on this. It provides public routines for registering and fetching derivative methods defined by a string key (e.g. “C2”) a DIRECTION (e.g. DIRECTION::X) and a STAGGER (e.g. STAGGER::None). There is one routine for each class of derivative (standard, standard2nd, standard4th, upwind and flux).

Public Types

template<> using standardFunc = std::function<void(const FieldType&, FieldType&, const std::string&)>¶

template<> using flowFunc = std::function<void(const FieldType&, const FieldType&, FieldType&, const std::string&)>¶

template<> using upwindFunc = flowFunc ¶

template<> using fluxFunc = flowFunc ¶

template<> using storageType = std::unordered_map<K, V>¶

Public Functions

DerivativeStore(const DerivativeStore &junk)¶

bool isEmpty() const¶: Report if store has any registered methods.

bool isEmpty(std::size_t key) const¶: Report if store has any registered methods for specific type determined by key.

bool isEmpty(DERIV derivType, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶: Report if store has any registered methods for specific type.

std::set<std::string> getAvailableMethods(DERIV derivType, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶: Returns a vector of all registered method names for the specified derivative type, direction and stagger.

void listAvailableMethods(DERIV derivType, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶: Outputs a list of all registered method names for the specified derivative type, direction and stagger.

void registerDerivative(standardFunc func, DERIV derivType, DIRECTION direction, STAGGER stagger, std::string methodName)¶: Register a function with standardFunc interface. Which map is used depends on the derivType input.

void registerDerivative(upwindFunc func, DERIV derivType, DIRECTION direction, STAGGER stagger, std::string methodName)¶: Register a function with upwindFunc/fluxFunc interface. Which map is used depends on the derivType input.

template<typename Direction, typename Stagger, typename Method> void registerDerivative(standardFunc func, Direction direction, Stagger stagger, Method method)¶: Templated versions of the above registration routines.

template<typename Direction, typename Stagger, typename Method> void registerDerivative(upwindFunc func, Direction direction, Stagger stagger, Method method)¶

standardFunc getStandardDerivative(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None, DERIV derivType = DERIV::Standard) const¶: Routines to return a specific differential operator. Note we have to have a separate routine for different methods as they have different return types. As such we choose to use a different name for each of the method-classes so everything is consistently treated

standardFunc getStandard2ndDerivative(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶

standardFunc getStandard4thDerivative(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶

flowFunc getFlowDerivative(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None, DERIV derivType = DERIV::Upwind) const¶

upwindFunc getUpwindDerivative(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶

fluxFunc getFluxDerivative(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶

void initialise(Options *options)¶

void forceDefaultMethod(std::string methodName, DERIV deriv, DIRECTION direction, STAGGER stagger = STAGGER::None)¶: Provide a method to override/force a specific default method.

void clear()¶: Empty all member storage.

void reset()¶: Reset to initial state.

Public Static Functions

static DerivativeStore &getInstance()¶

Private Functions

DerivativeStore()¶

void setDefaults()¶

std::string getMethodName(std::string name, DIRECTION direction, STAGGER stagger = STAGGER::None) const¶

std::string nameLookup(const std::string name, const std::string defaultName) const¶

std::size_t getKey(DIRECTION direction, STAGGER stagger, std::string key) const¶: Provides a routine to produce a unique key given information about the specific type required. This is templated so requires compile-time information. Need to also supply a non-templated version to account for run-time choices Note : We could include the derivType in the key this would allow us to store all methods with the same function interface in the same map, which might be nice.

template<typename Direction, typename Stagger, typename Method> std::size_t getKey() const¶: Provides a routine to produce a unique key given information about the specific type required. This is templated so requires compile-time information. Makes use of a non-templated version that can be used to account for run-time choices

Private Members

storageType<std::size_t, standardFunc> standard¶

storageType<std::size_t, standardFunc> standardSecond¶

storageType<std::size_t, standardFunc> standardFourth¶

storageType<std::size_t, upwindFunc> upwind¶

storageType<std::size_t, fluxFunc> flux¶

storageType<std::size_t, std::set<std::string>> registeredMethods¶

storageType<std::size_t, std::string> defaultMethods¶: The following stores what actual method to use when DIFF_DEFAULT is passed. The key is determined using the getKey routine here, where the name we pass is determined by the type of method (standard, upwind etc.). Note for now we’ll always use STAGGER::None as we currently assume the default method is independent of staggering it might be useful to relax this assumption!