Detailed Description

methods to include and access pricer plugins of SCIP

Functions
	SCIP_DECL_SORTPTRCOMP (SCIPpricerComp)

	SCIP_DECL_SORTPTRCOMP (SCIPpricerCompName)

SCIP_PRICERDATA *	SCIPpricerGetData (SCIP_PRICER *pricer)

void	SCIPpricerSetData (SCIP_PRICER pricer, SCIP_PRICERDATA pricerdata)

const char *	SCIPpricerGetName (SCIP_PRICER *pricer)

const char *	SCIPpricerGetDesc (SCIP_PRICER *pricer)

int	SCIPpricerGetPriority (SCIP_PRICER *pricer)

int	SCIPpricerGetNCalls (SCIP_PRICER *pricer)

int	SCIPpricerGetNVarsFound (SCIP_PRICER *pricer)

SCIP_Real	SCIPpricerGetSetupTime (SCIP_PRICER *pricer)

SCIP_Real	SCIPpricerGetTime (SCIP_PRICER *pricer)

SCIP_Bool	SCIPpricerIsActive (SCIP_PRICER *pricer)

SCIP_Bool	SCIPpricerIsDelayed (SCIP_PRICER *pricer)

SCIP_Bool	SCIPpricerIsInitialized (SCIP_PRICER *pricer)

SCIP_RETCODE	SCIPincludePricer (SCIP scip, const char name, const char desc, int priority, SCIP_Bool delay, SCIP_DECL_PRICERCOPY((pricercopy)), SCIP_DECL_PRICERFREE((pricerfree)), SCIP_DECL_PRICERINIT((pricerinit)), SCIP_DECL_PRICEREXIT((pricerexit)), SCIP_DECL_PRICERINITSOL((pricerinitsol)), SCIP_DECL_PRICEREXITSOL((pricerexitsol)), SCIP_DECL_PRICERREDCOST((pricerredcost)), SCIP_DECL_PRICERFARKAS((pricerfarkas)), SCIP_PRICERDATA pricerdata)

SCIP_RETCODE	SCIPincludePricerBasic (SCIP scip, SCIP_PRICER pricerptr, const char name, const char desc, int priority, SCIP_Bool delay, SCIP_DECL_PRICERREDCOST((pricerredcost)), SCIP_DECL_PRICERFARKAS((pricerfarkas)), SCIP_PRICERDATA pricerdata)

SCIP_RETCODE	SCIPsetPricerCopy (SCIP scip, SCIP_PRICER pricer, SCIP_DECL_PRICERCOPY((*pricercopy)))

SCIP_RETCODE	SCIPsetPricerFree (SCIP scip, SCIP_PRICER pricer, SCIP_DECL_PRICERFREE((*pricerfree)))

SCIP_RETCODE	SCIPsetPricerInit (SCIP scip, SCIP_PRICER pricer, SCIP_DECL_PRICERINIT((*pricerinit)))

SCIP_RETCODE	SCIPsetPricerExit (SCIP scip, SCIP_PRICER pricer, SCIP_DECL_PRICEREXIT((*pricerexit)))

SCIP_RETCODE	SCIPsetPricerInitsol (SCIP scip, SCIP_PRICER pricer, SCIP_DECL_PRICERINITSOL((*pricerinitsol)))

SCIP_RETCODE	SCIPsetPricerExitsol (SCIP scip, SCIP_PRICER pricer, SCIP_DECL_PRICEREXITSOL((*pricerexitsol)))

SCIP_PRICER *	SCIPfindPricer (SCIP scip, const char name)

SCIP_PRICER **	SCIPgetPricers (SCIP *scip)

int	SCIPgetNPricers (SCIP *scip)

int	SCIPgetNActivePricers (SCIP *scip)

SCIP_RETCODE	SCIPsetPricerPriority (SCIP scip, SCIP_PRICER pricer, int priority)

SCIP_RETCODE	SCIPactivatePricer (SCIP scip, SCIP_PRICER pricer)

SCIP_RETCODE	SCIPdeactivatePricer (SCIP scip, SCIP_PRICER pricer)

Function Documentation

◆ SCIP_DECL_SORTPTRCOMP() [1/2]

SCIP_DECL_SORTPTRCOMP ( SCIPpricerComp )

compares two pricers w. r. to their priority

compares two pricers w. r. to their activity and their priority

Definition at line 44 of file pricer.c.

References active.

◆ SCIP_DECL_SORTPTRCOMP() [2/2]

SCIP_DECL_SORTPTRCOMP ( SCIPpricerCompName )

comparison method for sorting pricers w.r.t. to their name

Definition at line 53 of file pricer.c.

References active, and SCIPpricerGetName().

◆ SCIPpricerGetData()

SCIP_PRICERDATA* SCIPpricerGetData ( SCIP_PRICER * pricer )

gets user data of variable pricer

Parameters

pricer variable pricer

Definition at line 463 of file pricer.c.

References SCIP_Pricer::pricerdata.

Referenced by SCIP_DECL_PRICERCOPY(), SCIP_DECL_PRICEREXIT(), SCIP_DECL_PRICEREXITSOL(), SCIP_DECL_PRICERFARKAS(), SCIP_DECL_PRICERFREE(), SCIP_DECL_PRICERINIT(), SCIP_DECL_PRICERINITSOL(), SCIP_DECL_PRICERREDCOST(), SCIPfindObjPricer(), SCIPgetObjPricer(), and SCIPpricerBinpackingActivate().

◆ SCIPpricerSetData()

void SCIPpricerSetData	(	SCIP_PRICER *	pricer,
		SCIP_PRICERDATA *	pricerdata
	)

sets user data of variable pricer; user has to free old data in advance!

Parameters

pricer	variable pricer
pricerdata	new variable pricer user data

Definition at line 473 of file pricer.c.

References SCIP_Pricer::pricerdata.

Referenced by SCIP_DECL_PRICERFREE().

◆ SCIPpricerGetName()

const char* SCIPpricerGetName ( SCIP_PRICER * pricer )

gets name of variable pricer

Parameters

pricer variable pricer

Definition at line 550 of file pricer.c.

References SCIP_Pricer::name.

Referenced by SCIP_DECL_DIALOGEXEC(), SCIP_DECL_SORTPTRCOMP(), SCIPincludeDialogDefaultFix(), SCIPincludeDialogDefaultSet(), SCIPpriceLoop(), SCIPpricerCopyInclude(), SCIPprintPricerStatistics(), and SCIPsetIncludeReader().

◆ SCIPpricerGetDesc()

const char* SCIPpricerGetDesc ( SCIP_PRICER * pricer )

gets description of variable pricer

Parameters

pricer variable pricer

Definition at line 560 of file pricer.c.

References SCIP_Pricer::desc.

Referenced by SCIP_DECL_DIALOGEXEC(), SCIPincludeDialogDefaultFix(), and SCIPincludeDialogDefaultSet().

◆ SCIPpricerGetPriority()

int SCIPpricerGetPriority ( SCIP_PRICER * pricer )

gets priority of variable pricer

Parameters

pricer variable pricer

Definition at line 570 of file pricer.c.

References SCIP_Pricer::priority.

Referenced by SCIP_DECL_DIALOGEXEC().

◆ SCIPpricerGetNCalls()

int SCIPpricerGetNCalls ( SCIP_PRICER * pricer )

gets the number of times, the pricer was called and tried to find a variable with negative reduced costs

Parameters

pricer variable pricer

Definition at line 594 of file pricer.c.

References SCIP_Pricer::ncalls.

Referenced by SCIPprintPricerStatistics().

◆ SCIPpricerGetNVarsFound()

int SCIPpricerGetNVarsFound ( SCIP_PRICER * pricer )

gets the number of variables with negative reduced costs found by this pricer

Parameters

pricer variable pricer

Definition at line 604 of file pricer.c.

References SCIP_Pricer::nvarsfound.

Referenced by SCIPprintPricerStatistics().

◆ SCIPpricerGetSetupTime()

SCIP_Real SCIPpricerGetSetupTime ( SCIP_PRICER * pricer )

gets time in seconds used in this pricer for setting up for next stages

Parameters

pricer variable pricer

Definition at line 614 of file pricer.c.

References SCIPclockGetTime(), and SCIP_Pricer::setuptime.

Referenced by SCIPprintPricerStatistics().

◆ SCIPpricerGetTime()

SCIP_Real SCIPpricerGetTime ( SCIP_PRICER * pricer )

gets time in seconds used in this pricer

Parameters

pricer variable pricer

Definition at line 624 of file pricer.c.

References SCIP_Pricer::pricerclock, and SCIPclockGetTime().

Referenced by SCIPprintPricerStatistics().

◆ SCIPpricerIsActive()

SCIP_Bool SCIPpricerIsActive ( SCIP_PRICER * pricer )

returns whether the given pricer is in use in the current problem

Parameters

pricer variable pricer

Definition at line 646 of file pricer.c.

References SCIP_Pricer::active.

Referenced by SCIPsetEnableOrDisablePluginClocks().

◆ SCIPpricerIsDelayed()

SCIP_Bool SCIPpricerIsDelayed ( SCIP_PRICER * pricer )

returns whether the pricer should be delayed until no other pricer finds a new variable

Parameters

pricer variable pricer

Definition at line 656 of file pricer.c.

References SCIP_Pricer::delay.

Referenced by SCIP_DECL_DIALOGEXEC().

◆ SCIPpricerIsInitialized()

SCIP_Bool SCIPpricerIsInitialized ( SCIP_PRICER * pricer )

is variable pricer initialized?

Parameters

pricer variable pricer

Definition at line 666 of file pricer.c.

References SCIP_Pricer::initialized.

◆ SCIPincludePricer()

SCIP_RETCODE SCIPincludePricer	(	SCIP *	scip,
		const char *	name,
		const char *	desc,
		int	priority,
		SCIP_Bool	delay,
		SCIP_DECL_PRICERCOPY((*pricercopy))	,
		SCIP_DECL_PRICERFREE((*pricerfree))	,
		SCIP_DECL_PRICERINIT((*pricerinit))	,
		SCIP_DECL_PRICEREXIT((*pricerexit))	,
		SCIP_DECL_PRICERINITSOL((*pricerinitsol))	,
		SCIP_DECL_PRICEREXITSOL((*pricerexitsol))	,
		SCIP_DECL_PRICERREDCOST((*pricerredcost))	,
		SCIP_DECL_PRICERFARKAS((*pricerfarkas))	,
		SCIP_PRICERDATA *	pricerdata
	)

creates a variable pricer and includes it in SCIP To use the variable pricer for solving a problem, it first has to be activated with a call to SCIPactivatePricer(). This should be done during the problem creation stage.

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Note: method has all pricer callbacks as arguments and is thus changed every time a new callback is added in future releases; consider using SCIPincludePricerBasic() and setter functions if you seek for a method which is less likely to change in future releases

Parameters

scip	SCIP data structure
name	name of variable pricer
desc	description of variable pricer
priority	priority of the variable pricer
delay	should the pricer be delayed until no other pricers or already existing problem variables with negative reduced costs are found? if this is set to FALSE it may happen that the pricer produces columns that already exist in the problem (which are also priced in by the default problem variable pricing in the same round)
pricerdata	variable pricer data

Definition at line 5439 of file scip.c.

References checkStage(), FALSE, Scip::mem, Scip::messagehdlr, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPfindPricer(), SCIPpricerCreate(), SCIPsetIncludePricer(), Scip::set, SCIP_Mem::setmem, and TRUE.

Referenced by SCIPincludeObjPricer().

◆ SCIPincludePricerBasic()

SCIP_RETCODE SCIPincludePricerBasic	(	SCIP *	scip,
		SCIP_PRICER **	pricerptr,
		const char *	name,
		const char *	desc,
		int	priority,
		SCIP_Bool	delay,
		SCIP_DECL_PRICERREDCOST((*pricerredcost))	,
		SCIP_DECL_PRICERFARKAS((*pricerfarkas))	,
		SCIP_PRICERDATA *	pricerdata
	)

creates a variable pricer and includes it in SCIP with all non-fundamental callbacks set to NULL; if needed, these can be added afterwards via setter functions SCIPsetPricerCopy(), SCIPsetPricerFree(), SCIPsetPricerInity(), SCIPsetPricerExit(), SCIPsetPricerInitsol(), SCIPsetPricerExitsol(), SCIPsetPricerFarkas();

To use the variable pricer for solving a problem, it first has to be activated with a call to SCIPactivatePricer(). This should be done during the problem creation stage.

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Note: if you want to set all callbacks with a single method call, consider using SCIPincludePricer() instead

Parameters

scip	SCIP data structure
pricerptr	reference to a pricer, or NULL
name	name of variable pricer
desc	description of variable pricer
priority	priority of the variable pricer
delay	should the pricer be delayed until no other pricers or already existing problem variables with negative reduced costs are found? if this is set to FALSE it may happen that the pricer produces columns that already exist in the problem (which are also priced in by the default problem variable pricing in the same round)
pricerdata	variable pricer data

Definition at line 5497 of file scip.c.

References checkStage(), FALSE, Scip::mem, Scip::messagehdlr, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPfindPricer(), SCIPpricerCreate(), SCIPsetIncludePricer(), Scip::set, SCIP_Mem::setmem, and TRUE.

Referenced by SCIPincludePricerBinpacking().

◆ SCIPsetPricerCopy()

SCIP_RETCODE SCIPsetPricerCopy	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		SCIP_DECL_PRICERCOPY((*pricercopy))
	)

sets copy method of pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	pricer

Definition at line 5545 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerSetCopy(), and TRUE.

◆ SCIPsetPricerFree()

SCIP_RETCODE SCIPsetPricerFree	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		SCIP_DECL_PRICERFREE((*pricerfree))
	)

sets destructor method of pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	pricer

Definition at line 5569 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerSetFree(), and TRUE.

Referenced by SCIPincludePricerBinpacking().

◆ SCIPsetPricerInit()

SCIP_RETCODE SCIPsetPricerInit	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		SCIP_DECL_PRICERINIT((*pricerinit))
	)

sets initialization method of pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	pricer

Definition at line 5593 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerSetInit(), and TRUE.

Referenced by SCIPincludePricerBinpacking().

◆ SCIPsetPricerExit()

SCIP_RETCODE SCIPsetPricerExit	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		SCIP_DECL_PRICEREXIT((*pricerexit))
	)

sets deinitialization method of pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	pricer

Definition at line 5617 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerSetExit(), and TRUE.

◆ SCIPsetPricerInitsol()

SCIP_RETCODE SCIPsetPricerInitsol	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		SCIP_DECL_PRICERINITSOL((*pricerinitsol))
	)

sets solving process initialization method of pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	pricer

Definition at line 5641 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerSetInitsol(), and TRUE.

◆ SCIPsetPricerExitsol()

SCIP_RETCODE SCIPsetPricerExitsol	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		SCIP_DECL_PRICEREXITSOL((*pricerexitsol))
	)

sets solving process deinitialization method of pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	pricer

Definition at line 5665 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerSetExitsol(), and TRUE.

Referenced by SCIPincludePricerBinpacking().

◆ SCIPfindPricer()

SCIP_PRICER* SCIPfindPricer	(	SCIP *	scip,
		const char *	name
	)

returns the variable pricer of the given name, or NULL if not existing

Parameters

scip	SCIP data structure
name	name of variable pricer

Definition at line 5681 of file scip.c.

References SCIPsetFindPricer(), and Scip::set.

Referenced by SCIPfindObjPricer(), SCIPincludePricer(), SCIPincludePricerBasic(), and SCIPpricerBinpackingActivate().

◆ SCIPgetPricers()

SCIP_PRICER** SCIPgetPricers ( SCIP * scip )

returns the array of currently available variable pricers; active pricers are in the first slots of the array

Parameters

scip	SCIP data structure

Definition at line 5694 of file scip.c.

References SCIP_Set::pricers, SCIPsetSortPricers(), and Scip::set.

Referenced by SCIP_DECL_DIALOGEXEC(), SCIPincludeDialogDefaultFix(), and SCIPincludeDialogDefaultSet().

◆ SCIPgetNPricers()

int SCIPgetNPricers ( SCIP * scip )

returns the number of currently available variable pricers

Parameters

scip	SCIP data structure

Definition at line 5707 of file scip.c.

References SCIP_Set::npricers, and Scip::set.

Referenced by SCIP_DECL_DIALOGEXEC(), SCIPincludeDialogDefaultFix(), and SCIPincludeDialogDefaultSet().

◆ SCIPgetNActivePricers()

int SCIPgetNActivePricers ( SCIP * scip )

returns the number of currently active variable pricers, that are used in the LP solving loop

Parameters

scip	SCIP data structure

Definition at line 5718 of file scip.c.

References SCIP_Set::nactivepricers, and Scip::set.

Referenced by determineSymmetry(), doCopy(), SCIP_DECL_BRANCHEXECLP(), SCIP_DECL_CONSPRESOL(), SCIP_DECL_CONSPROP(), SCIP_DECL_PRESOLEXEC(), and SCIPapplyHeurSubNlp().

◆ SCIPsetPricerPriority()

SCIP_RETCODE SCIPsetPricerPriority	(	SCIP *	scip,
		SCIP_PRICER *	pricer,
		int	priority
	)

sets the priority of a variable pricer

sets the priority priority of a variable pricer

Parameters

scip	SCIP data structure
pricer	variable pricer
priority	new priority of the variable pricer

Definition at line 5729 of file scip.c.

References SCIP_OKAY, SCIPpricerSetPriority(), and Scip::set.

Referenced by SCIP_DECL_PARAMCHGD().

◆ SCIPactivatePricer()

SCIP_RETCODE SCIPactivatePricer	(	SCIP *	scip,
		SCIP_PRICER *	pricer
	)

activates pricer to be used for the current problem This method should be called during the problem creation stage for all pricers that are necessary to solve the problem model. The pricers are automatically deactivated when the problem is freed.

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

SCIP_STAGE_PROBLEM

Parameters

scip	SCIP data structure
pricer	variable pricer

Definition at line 5754 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerActivate(), Scip::set, and TRUE.

Referenced by SCIPpricerBinpackingActivate(), and SCIPsetEnableOrDisablePluginClocks().

◆ SCIPdeactivatePricer()

SCIP_RETCODE SCIPdeactivatePricer	(	SCIP *	scip,
		SCIP_PRICER *	pricer
	)

deactivates pricer

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Precondition

This method can be called if SCIP is in one of the following stages:

Parameters

scip	SCIP data structure
pricer	variable pricer

Definition at line 5775 of file scip.c.

References checkStage(), FALSE, SCIP_CALL, SCIP_OKAY, SCIPpricerDeactivate(), Scip::set, and TRUE.

SCIP

Detailed Description

Functions

Function Documentation

◆ SCIP_DECL_SORTPTRCOMP() [1/2]

◆ SCIP_DECL_SORTPTRCOMP() [2/2]

◆ SCIPpricerGetData()

◆ SCIPpricerSetData()

◆ SCIPpricerGetName()

◆ SCIPpricerGetDesc()

◆ SCIPpricerGetPriority()

◆ SCIPpricerGetNCalls()

◆ SCIPpricerGetNVarsFound()

◆ SCIPpricerGetSetupTime()

◆ SCIPpricerGetTime()

◆ SCIPpricerIsActive()

◆ SCIPpricerIsDelayed()

◆ SCIPpricerIsInitialized()

◆ SCIPincludePricer()

◆ SCIPincludePricerBasic()

◆ SCIPsetPricerCopy()

◆ SCIPsetPricerFree()

◆ SCIPsetPricerInit()

◆ SCIPsetPricerExit()

◆ SCIPsetPricerInitsol()

◆ SCIPsetPricerExitsol()

◆ SCIPfindPricer()

◆ SCIPgetPricers()

◆ SCIPgetNPricers()

◆ SCIPgetNActivePricers()

◆ SCIPsetPricerPriority()

◆ SCIPactivatePricer()

◆ SCIPdeactivatePricer()