Parallel portfolio engine implementation. More...

#include <pbs.hh>

Public Member Functions
	PBS (Engine s, Stop so, unsigned int n, const Statistics &stat)
	Initialize. More...

virtual Space *	next (void)
	Return next solution (NULL, if none exists or search has been stopped) More...

virtual Statistics	statistics (void) const
	Return statistics. More...

virtual bool	stopped (void) const
	Check whether engine has been stopped. More...

virtual void	constrain (const Space &b)
	Constrain future solutions to be better than b. More...

virtual	~PBS (void)
	Destructor. More...

Protected Member Functions
bool	report (Slave< Collect > slave, Space s)
	Process report from slave, return false if solution was ignored. More...

Protected Attributes
Statistics	stat
	Master statistics. More...

Slave< Collect > **	slaves
	Slave engines. More...

unsigned int	n_slaves
	Number of slave engines. More...

unsigned int	n_active
	Number of active slave engines. More...

bool	slave_stop
	Whether a slave has been stopped. More...

volatile bool	tostop
	Shared stop flag. More...

Collect	solutions
	Collect solutions in this. More...

Support::Mutex	m
	Mutex for synchronization. More...

unsigned int	n_busy
	Number of busy slaves. More...

Support::Event	idle
	Signal that number of busy slaves becomes zero. More...

Detailed Description

template<class Collect>
class Gecode::Search::Par::PBS< Collect >

Parallel portfolio engine implementation.

Definition at line 63 of file pbs.hh.

Constructor & Destructor Documentation

◆ PBS()

template<class Collect >

Gecode::Search::Par::PBS< Collect >::PBS	(	Engine **	s,
		Stop **	so,
		unsigned int	n,
		const Statistics &	stat
	)

inline

Initialize.

The key invariant of the engine is as follows:

n_busy is always zero outside the next() function.
that entails, that locking is only needed insided next().
the slaves 0..n_active-1 still might not have exausted their search space.
the slaves n_active..n_slaves-1 have exhausted their search space.

Definition at line 155 of file pbs.hpp.

◆ ~PBS()

template<class Collect >

Gecode::Search::Par::PBS< Collect >::~PBS ( void )

virtual

Destructor.

Definition at line 284 of file pbs.hpp.

Member Function Documentation

◆ report()

template<class Collect >

bool Gecode::Search::Par::PBS< Collect >::report	(	Slave< Collect > *	slave,
		Space *	s
	)

inlineprotected

Process report from slave, return false if solution was ignored.

Definition at line 170 of file pbs.hpp.

◆ next()

template<class Collect >

Space * Gecode::Search::Par::PBS< Collect >::next ( void )

virtual

Return next solution (NULL, if none exists or search has been stopped)

Definition at line 210 of file pbs.hpp.

◆ statistics()

template<class Collect >

Statistics Gecode::Search::Par::PBS< Collect >::statistics ( void ) const

virtual

Return statistics.

Definition at line 262 of file pbs.hpp.

◆ stopped()

template<class Collect >

bool Gecode::Search::Par::PBS< Collect >::stopped ( void ) const

virtual

Check whether engine has been stopped.

Definition at line 256 of file pbs.hpp.

◆ constrain()

template<class Collect >

void Gecode::Search::Par::PBS< Collect >::constrain ( const Space & b )

virtual

Constrain future solutions to be better than b.

Definition at line 272 of file pbs.hpp.

Member Data Documentation

◆ stat

template<class Collect >

Statistics Gecode::Search::Par::PBS< Collect >::stat

protected

Master statistics.

Definition at line 142 of file pbs.hh.

◆ slaves

template<class Collect >

Slave<Collect>** Gecode::Search::Par::PBS< Collect >::slaves

protected

Slave engines.

Definition at line 144 of file pbs.hh.

◆ n_slaves

template<class Collect >

unsigned int Gecode::Search::Par::PBS< Collect >::n_slaves

protected

Number of slave engines.

Definition at line 146 of file pbs.hh.

◆ n_active

template<class Collect >

unsigned int Gecode::Search::Par::PBS< Collect >::n_active

protected

Number of active slave engines.

Definition at line 148 of file pbs.hh.

◆ slave_stop

template<class Collect >

bool Gecode::Search::Par::PBS< Collect >::slave_stop

protected

Whether a slave has been stopped.

Definition at line 150 of file pbs.hh.

◆ tostop

template<class Collect >

volatile bool Gecode::Search::Par::PBS< Collect >::tostop

protected

Shared stop flag.

Definition at line 152 of file pbs.hh.

◆ solutions

template<class Collect >

Collect Gecode::Search::Par::PBS< Collect >::solutions

protected

Collect solutions in this.

Definition at line 154 of file pbs.hh.

◆ m

template<class Collect >

Support::Mutex Gecode::Search::Par::PBS< Collect >::m

protected

Mutex for synchronization.

Definition at line 156 of file pbs.hh.

◆ n_busy

template<class Collect >

unsigned int Gecode::Search::Par::PBS< Collect >::n_busy

protected

Number of busy slaves.

Definition at line 158 of file pbs.hh.

◆ idle

template<class Collect >

Support::Event Gecode::Search::Par::PBS< Collect >::idle

protected

Signal that number of busy slaves becomes zero.

Definition at line 160 of file pbs.hh.

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

gecode/search/par/pbs.hh
gecode/search/par/pbs.hpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<class Collect> class Gecode::Search::Par::PBS< Collect >

Constructor & Destructor Documentation

◆ PBS()

◆ ~PBS()

Member Function Documentation

◆ report()

◆ next()

◆ statistics()

◆ stopped()

◆ constrain()

Member Data Documentation

◆ stat

◆ slaves

◆ n_slaves

◆ n_active

◆ slave_stop

◆ tostop

◆ solutions

◆ m

◆ n_busy

◆ idle

template<class Collect>
class Gecode::Search::Par::PBS< Collect >