Extractor of variable domains for invert computations. More...

Inheritance diagram for sns::SDomExtract:

Collaboration diagram for sns::SDomExtract:

Public Member Functions
	SDomExtract ()

	SDomExtract (int t)

bool	skip_variable (int) const
	The skip_variable predicate indicates which variables are "don't care" with respect to this SHom. More...

bool	is_selector () const
	The isSelector predicate indicates a homomorphism that only selects paths in the SDD (no modifications, no additions) Tagging with isSelector() allows to enable optimizations and makes the homomorphism eligible as "condition" in ITE construct. More...

GSDD	eval (const GSDD &d) const
	The computation function responsible for evaluation over a node. More...

size_t	hash () const
	Hash key computation. More...

bool	operator== (const _GShom &s) const
	Comparator. More...

_GShom *	clone () const

void	print (std::ostream &os) const

GSDD	has_image_skip (const GSDD &) const

virtual const GShom::range_t	get_range () const
	The range returns the dual of skip_variable, default implem considers that all variables are affected by this homomorphism. More...

virtual GSDD	has_image (const GSDD &d) const

virtual GShom	compose (const GShom &) const

virtual void	mark () const
	For garbage collection. Used in first phase of garbage collection. More...

void	mark_if_refd () const

void	ref () const

void	deref () const

unsigned long int	refCounter () const

bool	is_marked () const

void	set_mark (bool val) const

virtual GShom	invert (const GSDD &) const

Static Public Member Functions
static const _GShom *	get_concret (const GShom &gshom)
	TODO : this is a dirty trick to allow us to do terms rewriting in Add, Fixpoint etc... More...

Public Attributes
int	target

Private Member Functions
GSDD	eval_skip (const GSDD &) const
	The procedure responsible for propagating efficiently across "skipped" variable nodes. More...

virtual bool	immediat () const
	For operation cache management. More...

Private Attributes
int	_refCounter
	For garbage collection. More...

Detailed Description

Extractor of variable domains for invert computations.

Constructor & Destructor Documentation

◆ SDomExtract() [1/2]

sns::SDomExtract::SDomExtract ( )

inline

Referenced by clone().

◆ SDomExtract() [2/2]

sns::SDomExtract::SDomExtract ( int t )

inline

Member Function Documentation

◆ clone()

_GShom* sns::SDomExtract::clone ( ) const

inlinevirtual

Implements _GShom.

References SDomExtract().

◆ compose()

GShom _GShom::compose ( const GShom & r ) const

virtualinherited

References GShom::id, and GSDD::null.

Referenced by GShom::compose().

◆ deref()

void _GShom::deref ( ) const

inlineinherited

References _GShom::_refCounter.

Referenced by Shom::operator=(), and Shom::~Shom().

◆ eval()

GSDD sns::SDomExtract::eval ( const GSDD & ) const

inlinevirtual

The computation function responsible for evaluation over a node.

Users should not directly use this. Normal behavior is to use GShom::operator() that encapsulates this call with operation caching.

Implements _GShom.

References SDED::add(), GSDD::begin(), GSDD::end(), _GShom::GShom, GSDD::null, GSDD::one, target, GSDD::top, and GSDD::variable().

◆ eval_skip()

GSDD _GShom::eval_skip ( const GSDD & d ) const

privateinherited

The procedure responsible for propagating efficiently across "skipped" variable nodes.

References GSDD::begin(), GSDD::end(), _GShom::eval(), GShom::id, _GShom::immediat(), GSDD::nbsons(), GSDD::null, GSDD::one, _GShom::skip_variable(), square_union(), GSDD::top, and GSDD::variable().

Referenced by GShom::eval().

◆ get_concret()

static const _GShom* _GShom::get_concret ( const GShom & gshom )

inlinestaticinherited

TODO : this is a dirty trick to allow us to do terms rewriting in Add, Fixpoint etc...

A more elegant architecture would be nice.

References GShom::concret.

Referenced by addCompositionParameter(), addParameter(), buildUnionParameters(), sns::RecFireSat::eval(), sns::Fixpoint::eval(), sns::Add::factorizeByLevel(), GShom::GShom(), sns::Fixpoint::has_image(), operator!(), operator*(), sns::recFireSat(), sns::Inter::skip_variable(), sns::Add::skip_variable(), and sns::RightConcat::skip_variable().

◆ get_range()

virtual const GShom::range_t _GShom::get_range ( ) const

inlinevirtualinherited

The range returns the dual of skip_variable, default implem considers that all variables are affected by this homomorphism.

Reimplemented in sns::Fixpoint, sns::Compose, sns::RecFireSat, sns::Add, sns::And, sns::SNotCond, sns::SLocalApply, and sns::LocalApply.

References GShom::full_range.

Referenced by GShom::get_range().

◆ has_image()

GSDD _GShom::has_image ( const GSDD & d ) const

virtualinherited

Reimplemented in StrongShom, sns::Fixpoint, sns::RightConcat, sns::LeftConcat, sns::Compose, sns::Add, sns::And, sns::SNotCond, sns::SLocalApply, sns::LocalApply, sns::Inter, and sns::Identity.

References _GShom::GShom.

Referenced by sns::Inter::has_image(), sns::SNotCond::has_image(), sns::Compose::has_image(), sns::Fixpoint::has_image(), and _GShom::has_image_skip().

◆ has_image_skip()

GSDD _GShom::has_image_skip ( const GSDD & d ) const

inherited

References GSDD::begin(), GSDD::end(), GShom::has_image(), _GShom::has_image(), GShom::id, GSDD::null, GSDD::one, _GShom::skip_variable(), GSDD::top, and GSDD::variable().

◆ hash()

size_t sns::SDomExtract::hash ( ) const

inlinevirtual

Hash key computation.

It is essential for good hash table operation that the spread of the keys be as good as possible. Also, fast hash key computation is a good design goal. Note that bad hash functions will yield more collisions, thus equality comparisons which may be quite costly.

Implements _GShom.

References target.

◆ immediat()

virtual bool _GShom::immediat ( ) const

inlineprivatevirtualinherited

For operation cache management.

If immediat==true, eval is called without attempting a cache hit. Currently only the constant homomorphism has this attribute set to true. Overload and return true for immediate computations.

Reimplemented in sns::Constant, and sns::Identity.

Referenced by _GShom::eval_skip(), and GShom::operator()().

◆ invert()

virtual GShom _GShom::invert ( const GSDD & ) const

inlinevirtualinherited

Reimplemented in sns::Fixpoint, sns::HomMinus, sns::Minus, sns::Compose, sns::RecFireSat, sns::Add, sns::And, sns::SLocalApply, sns::LocalApply, sns::Inter, sns::Mult, sns::SApply2k, sns::Constant, and sns::Identity.

References _GShom::is_selector(), Shom::null, and _GShom::print().

Referenced by GShom::invert().

◆ is_marked()

bool _GShom::is_marked ( ) const

inlineinherited

References _GShom::_refCounter.

Referenced by _GShom::set_mark().

◆ is_selector()

bool sns::SDomExtract::is_selector ( ) const

inlinevirtual

The isSelector predicate indicates a homomorphism that only selects paths in the SDD (no modifications, no additions) Tagging with isSelector() allows to enable optimizations and makes the homomorphism eligible as "condition" in ITE construct.

Reimplemented from _GShom.

◆ mark()

virtual void _GShom::mark ( ) const

inlinevirtualinherited

For garbage collection. Used in first phase of garbage collection.

Reimplemented in sns::MLShomAdapter, sns::Fixpoint, sns::HomMinus, sns::Minus, sns::RightConcat, sns::LeftConcat, sns::Compose, sns::RecFireSat, sns::Add, sns::And, sns::SNotCond, sns::SLocalApply, sns::LocalApply, sns::Inter, sns::Mult, sns::SApply2k, and sns::Constant.

Referenced by _GShom::set_mark().

◆ mark_if_refd()

void _GShom::mark_if_refd ( ) const

inlineinherited

References _GShom::refCounter(), and _GShom::set_mark().

◆ operator==()

bool sns::SDomExtract::operator== ( const _GShom & h ) const

inlinevirtual

Comparator.

Used in case of hash collision. Should be appropriately defined in derived classes, in particular in user defined homomorphisms.

Implements _GShom.

References target.

◆ print()

void sns::SDomExtract::print ( std::ostream & os ) const

inlinevirtual

Implements _GShom.

References target.

◆ ref()

void _GShom::ref ( ) const

inlineinherited

References _GShom::_refCounter.

Referenced by Shom::operator=(), and Shom::Shom().

◆ refCounter()

unsigned long int _GShom::refCounter ( ) const

inlineinherited

References _GShom::_refCounter.

Referenced by _GShom::mark_if_refd(), Shom::operator=(), GShom::refCounter(), and Shom::~Shom().

◆ set_mark()

void _GShom::set_mark ( bool val ) const

inlineinherited

References _GShom::_refCounter, _GShom::is_marked(), and _GShom::mark().

Referenced by GShom::garbage(), GShom::mark(), and _GShom::mark_if_refd().

◆ skip_variable()

bool sns::SDomExtract::skip_variable ( int ) const

inlinevirtual

The skip_variable predicate indicates which variables are "don't care" with respect to this SHom.

This is defined as a StrongHom with : phi(var,val) { if ( skip_variable(var) ) return GShom( var, val, this ); else { real behavior } }

Reimplemented from _GShom.

Member Data Documentation

◆ _refCounter

int _GShom::_refCounter

mutableprivateinherited

For garbage collection.

Counts the number of times a _GShom is referenced from the context of an Shom. For garbage collection: lowest bit of refCounter gives marking value for mark&sweep. Used in the two phase garbage collection process. A Shom that is not marked after the first pass over the unicity table, will be sweeped in the second phase. Outside of garbage collection routine, marking should always bear the value false.

Referenced by _GShom::deref(), _GShom::is_marked(), _GShom::ref(), _GShom::refCounter(), and _GShom::set_mark().

◆ target

int sns::SDomExtract::target

Referenced by eval(), hash(), operator==(), and print().

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

SHom.cpp

Public Member Functions

Static Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SDomExtract() [1/2]

◆ SDomExtract() [2/2]

Member Function Documentation

◆ clone()

◆ compose()

◆ deref()

◆ eval()

◆ eval_skip()

◆ get_concret()

◆ get_range()

◆ has_image()

◆ has_image_skip()

◆ hash()

◆ immediat()

◆ invert()

◆ is_marked()

◆ is_selector()

◆ mark()

◆ mark_if_refd()

◆ operator==()

◆ print()

◆ ref()

◆ refCounter()

◆ set_mark()

◆ skip_variable()

Member Data Documentation

◆ _refCounter

◆ target