Map BDD variables to formulae. More...

#include <spot/twa/bdddict.hh>

Collaboration diagram for spot::bdd_dict:

Classes
struct	bdd_info

Public Types
enum	var_type { anon = 0 , var , acc }

typedef std::map< formula, int >	fv_map
	Formula-to-BDD-variable maps. More...

typedef std::map< int, formula >	vf_map
	BDD-variable-to-formula maps. More...

typedef std::set< const void * >	ref_set
	BDD-variable reference counts. More...

typedef std::vector< bdd_info >	bdd_info_map

Public Member Functions
	~bdd_dict ()
	Destroy the BDD dict. More...

int	varnum (formula f)

void	unregister_all_my_variables (const void *me)
	Release all variables used by an object. More...

std::ostream &	dump (std::ostream &os) const
	Dump all variables for debugging. More...

void	assert_emptiness () const
	Make sure the dictionary is empty. More...


int	register_proposition (formula f, const void *for_me)
	Register an atomic proposition. More...

template<typename T >
int	register_proposition (formula f, std::shared_ptr< T > for_me)
	Register an atomic proposition. More...


int	has_registered_proposition (formula f, const void *me)
	whether a proposition has already been registered More...

template<typename T >
int	has_registered_proposition (formula f, std::shared_ptr< T > for_me)
	whether a proposition has already been registered More...


int	register_acceptance_variable (formula f, const void *for_me)
	Register an acceptance variable. More...

template<typename T >
int	register_acceptance_variable (formula f, std::shared_ptr< T > for_me)
	Register an acceptance variable. More...


int	register_anonymous_variables (int n, const void *for_me)
	Register anonymous BDD variables. More...

template<typename T >
int	register_anonymous_variables (int n, std::shared_ptr< T > for_me)
	Register anonymous BDD variables. More...


void	register_all_variables_of (const void from_other, const void for_me)
	Duplicate the variable usage of another object. More...

template<typename T >
void	register_all_variables_of (const void *from_other, std::shared_ptr< T > for_me)
	Duplicate the variable usage of another object. More...

template<typename T >
void	register_all_variables_of (std::shared_ptr< T > from_other, const void *for_me)
	Duplicate the variable usage of another object. More...

template<typename T , typename U >
void	register_all_variables_of (std::shared_ptr< T > from_other, std::shared_ptr< U > for_me)
	Duplicate the variable usage of another object. More...


void	unregister_variable (int var, const void *me)
	Release a variable used by me. More...

template<typename T >
void	unregister_variable (int var, std::shared_ptr< T > me)
	Release a variable used by me. More...

Public Attributes
fv_map	var_map
	Maps atomic propositions to BDD variables. More...

fv_map	acc_map
	Maps acceptance conditions to BDD variables. More...

bdd_info_map	bdd_map

Detailed Description

Map BDD variables to formulae.

The BDD library uses integers to designate Boolean variables in its decision diagrams. This class is used to map such integers to objects actually used in Spot. These objects are usually atomic propositions, but they can also be acceptance conditions.

When a BDD variable is registered using a bdd_dict, it is always associated to a "user" (or "owner") object. This is done by supplying the bdd_dict with a pointer to the intended user of the variable. When the user object dies, it should release the BDD variables it was using by calling (for instance) unregister_all_my_variables(), giving the same pointer. Variables can also by unregistered one by one using unregister_variable().

Member Typedef Documentation

◆ fv_map

typedef std::map<formula, int> spot::bdd_dict::fv_map

Formula-to-BDD-variable maps.

◆ ref_set

typedef std::set<const void*> spot::bdd_dict::ref_set

BDD-variable reference counts.

◆ vf_map

typedef std::map<int, formula> spot::bdd_dict::vf_map

BDD-variable-to-formula maps.

Constructor & Destructor Documentation

◆ ~bdd_dict()

spot::bdd_dict::~bdd_dict ( )

Destroy the BDD dict.

This always calls assert_emptiness() to diagnose cases where variables have not been unregistered.

Member Function Documentation

◆ assert_emptiness()

void spot::bdd_dict::assert_emptiness ( ) const

Make sure the dictionary is empty.

This will print diagnostics if the dictionary is not empty. Use for debugging. This is called automatically by the destructor. When Spot is compiled in development mode (i.e., with ./configure –enable-devel), this function will abort if the dictionary is not empty.

The errors detected by this function usually indicate missing calls to unregister_variable() or unregister_all_my_variables().

◆ dump()

std::ostream& spot::bdd_dict::dump ( std::ostream & os ) const

Dump all variables for debugging.

Parameters

os	The output stream.

◆ has_registered_proposition() [1/2]

int spot::bdd_dict::has_registered_proposition	(	formula	f,
		const void *	me
	)

whether a proposition has already been registered

If f has been registered for me, this returns a non-negative value that is the BDD variable number. Otherwise this returns -1.

◆ has_registered_proposition() [2/2]

template<typename T >

int spot::bdd_dict::has_registered_proposition	(	formula	f,
		std::shared_ptr< T >	for_me
	)

inline

whether a proposition has already been registered

If f has been registered for me, this returns a non-negative value that is the BDD variable number. Otherwise this returns -1.

◆ register_acceptance_variable() [1/2]

int spot::bdd_dict::register_acceptance_variable	(	formula	f,
		const void *	for_me
	)

Register an acceptance variable.

Return (and maybe allocate) a BDD variable designating an acceptance set associated to formula f. The for_me argument should point to the object using this BDD variable, this is used for reference counting. It is perfectly safe to call this function several time with the same arguments.

Returns: The variable number. Use bdd_ithvar() or bdd_nithvar() to convert this to a BDD.

◆ register_acceptance_variable() [2/2]

template<typename T >

int spot::bdd_dict::register_acceptance_variable	(	formula	f,
		std::shared_ptr< T >	for_me
	)

inline

Register an acceptance variable.

Return (and maybe allocate) a BDD variable designating an acceptance set associated to formula f. The for_me argument should point to the object using this BDD variable, this is used for reference counting. It is perfectly safe to call this function several time with the same arguments.

Returns: The variable number. Use bdd_ithvar() or bdd_nithvar() to convert this to a BDD.

◆ register_all_variables_of() [1/4]

void spot::bdd_dict::register_all_variables_of	(	const void *	from_other,
		const void *	for_me
	)

Duplicate the variable usage of another object.

This tells this dictionary that the for_me object will be using the same BDD variables as the from_other objects. This ensures that the variables won't be freed when from_other is deleted if from_other is still alive.

◆ register_all_variables_of() [2/4]

template<typename T >

void spot::bdd_dict::register_all_variables_of	(	const void *	from_other,
		std::shared_ptr< T >	for_me
	)

inline

Duplicate the variable usage of another object.

This tells this dictionary that the for_me object will be using the same BDD variables as the from_other objects. This ensures that the variables won't be freed when from_other is deleted if from_other is still alive.

◆ register_all_variables_of() [3/4]

template<typename T >

void spot::bdd_dict::register_all_variables_of	(	std::shared_ptr< T >	from_other,
		const void *	for_me
	)

inline

Duplicate the variable usage of another object.

This tells this dictionary that the for_me object will be using the same BDD variables as the from_other objects. This ensures that the variables won't be freed when from_other is deleted if from_other is still alive.

◆ register_all_variables_of() [4/4]

template<typename T , typename U >

void spot::bdd_dict::register_all_variables_of	(	std::shared_ptr< T >	from_other,
		std::shared_ptr< U >	for_me
	)

inline

Duplicate the variable usage of another object.

This tells this dictionary that the for_me object will be using the same BDD variables as the from_other objects. This ensures that the variables won't be freed when from_other is deleted if from_other is still alive.

◆ register_anonymous_variables() [1/2]

int spot::bdd_dict::register_anonymous_variables	(	int	n,
		const void *	for_me
	)

Register anonymous BDD variables.

Return (and maybe allocate) n consecutive BDD variables which will be used only by for_me.

Returns: The variable number. Use bdd_ithvar() or bdd_nithvar() to convert this to a BDD.

◆ register_anonymous_variables() [2/2]

template<typename T >

int spot::bdd_dict::register_anonymous_variables	(	int	n,
		std::shared_ptr< T >	for_me
	)

inline

Register anonymous BDD variables.

Return (and maybe allocate) n consecutive BDD variables which will be used only by for_me.

Returns: The variable number. Use bdd_ithvar() or bdd_nithvar() to convert this to a BDD.

◆ register_proposition() [1/2]

int spot::bdd_dict::register_proposition	(	formula	f,
		const void *	for_me
	)

Register an atomic proposition.

Return (and maybe allocate) a BDD variable designating formula f. The for_me argument should point to the object using this BDD variable, this is used for reference counting. It is perfectly safe to call this function several time with the same arguments.

Returns: The variable number. Use bdd_ithvar() or bdd_nithvar() to convert this to a BDD.

◆ register_proposition() [2/2]

template<typename T >

int spot::bdd_dict::register_proposition	(	formula	f,
		std::shared_ptr< T >	for_me
	)

inline

Register an atomic proposition.

Return (and maybe allocate) a BDD variable designating formula f. The for_me argument should point to the object using this BDD variable, this is used for reference counting. It is perfectly safe to call this function several time with the same arguments.

Returns: The variable number. Use bdd_ithvar() or bdd_nithvar() to convert this to a BDD.

◆ unregister_all_my_variables()

void spot::bdd_dict::unregister_all_my_variables ( const void * me )

Release all variables used by an object.

Usually called in the destructor if me.

◆ unregister_variable() [1/2]

void spot::bdd_dict::unregister_variable	(	int	var,
		const void *	me
	)

Release a variable used by me.

◆ unregister_variable() [2/2]

template<typename T >

void spot::bdd_dict::unregister_variable	(	int	var,
		std::shared_ptr< T >	me
	)

inline

Release a variable used by me.

Member Data Documentation

◆ acc_map

fv_map spot::bdd_dict::acc_map

Maps acceptance conditions to BDD variables.

◆ var_map

fv_map spot::bdd_dict::var_map

Maps atomic propositions to BDD variables.

The documentation for this class was generated from the following file:

spot/twa/bdddict.hh

Classes

Public Types

Public Member Functions

Public Attributes

Detailed Description

Member Typedef Documentation

◆ fv_map

◆ ref_set

◆ vf_map

Constructor & Destructor Documentation

◆ ~bdd_dict()

Member Function Documentation

◆ assert_emptiness()

◆ dump()

◆ has_registered_proposition() [1/2]

◆ has_registered_proposition() [2/2]

◆ register_acceptance_variable() [1/2]

◆ register_acceptance_variable() [2/2]

◆ register_all_variables_of() [1/4]

◆ register_all_variables_of() [2/4]

◆ register_all_variables_of() [3/4]

◆ register_all_variables_of() [4/4]

◆ register_anonymous_variables() [1/2]

◆ register_anonymous_variables() [2/2]

◆ register_proposition() [1/2]

◆ register_proposition() [2/2]

◆ unregister_all_my_variables()

◆ unregister_variable() [1/2]

◆ unregister_variable() [2/2]

Member Data Documentation

◆ acc_map

◆ var_map