RoutingEvent Class Reference

Atomic Placement Request for a TrackSegment. More...

Classes
class	Key
	RoutingEvent cached key for maps. More...

Public Types
enum	Mode {   Negociate =1,   Pack =2,   Repair =3 }

Public Member Functions
RoutingEvent *	clone () const
void	destroy ()
bool	isCloned () const
bool	isValid () const
bool	isUnimplemented () const
bool	isProcessed () const
bool	isDisabled () const
bool	isForcedToHint () const
bool	isRipedByLocal () const
bool	getMode () const
bool	canMinimize () const
unsigned int	getState () const
const Key &	getKey () const
TrackElement *	getSegment () const
const vector< TrackElement * > &	getPerpandiculars () const
DbU::Unit	getAxisHint () const
DbU::Unit	getAxisHistory () const
long	getAxisWeight (DbU::Unit) const
const Interval &	getConstraints () const
const Interval &	getOptimal () const
float	getPriority () const
unsigned int	getTracksNb () const
unsigned int	getInsertState () const
unsigned int	getEventLevel () const
void	revalidate ()
void	updateKey ()
void	process (RoutingEventQueue &, RoutingEventHistory &, RoutingEventLoop &)
void	setSegment (TrackElement *)
RoutingEvent *	reschedule (RoutingEventQueue &, unsigned int eventLevel)
void	setMode (unsigned int)
void	setState (unsigned int)
void	setAxisHintFromParent ()
void	incInsertState ()
void	resetInsertState ()
void	setEventLevel (unsigned int)

Static Public Member Functions
static unsigned int	getStage ()
static size_t	getAllocateds ()
static size_t	getProcesseds ()
static void	resetProcesseds ()
static void	setStage (unsigned int)
static RoutingEvent *	create (TrackElement *, unsigned int mode=Negociate)

Detailed Description

Atomic Placement Request for a TrackSegment.

The trackFrees attribute has to be reviewed not sure it's still useful.

Cached key for stable sorting, see RoutingEvent::Key.

Member Enumeration Documentation

Mode

enum Mode

The working mode of the router, affect how events are to be handled.

Enumerator
Negociate	This is the normal mode of operation, topological modifications and ripup are enableds.
Pack	First post-processing step. For each segment, tries to find a more compact position for a segment, but without riping any others.
Repair	Second post-processing step, try to find a suitable location for a segment more aggressively.

Member Function Documentation

getStage()

unsigned int getStage ( )

static

Returns: The stage the router is in (see RoutingEvent::Mode).

Referenced by SegmentAction::doAction(), Manipulator::repackPerpandiculars(), RoutingEvent::revalidate(), SegmentFsm::SegmentFsm(), and DataNegociate::update().

getAllocateds()

size_t getAllocateds ( )

static

Returns: The number of RoutingEvent currently allocateds.

getProcesseds()

size_t getProcesseds ( )

static

Returns: The number of RoutingEvent that have been processeds since the last call to RoutingEvent::resetProcesseds().

Referenced by RoutingEventLoop::update().

resetProcesseds()

void resetProcesseds ( )

static

Returns: Reset the number of processeds events.

setStage()

unsigned int setStage ( unsigned int  mode )

static

Sets the router's stage (see RoutingEvent::Mode).

create()

RoutingEvent * create ( TrackElement *  element, unsigned int  mode = Negociate  )

static

Parameters

element	The element for which to create the event.
mode	The mode into which this event will be valid.

RoutingEvent constructor.

Referenced by RoutingEventQueue::add(), and RoutingEventQueue::load().

clone()

RoutingEvent * clone

(

)

const

Returns

A clone of the event.

Cloning an event is slightly different from copying it (which is forbidden). There can be multiple events for one element but only one must be active at a time. This is a cheap way of implementing the rescheduling mechanism. The original event remains the active one, but it's cloned flag is raised. The cloned event is created inactive and with a null eventLevel.

destroy()

void destroy

(

)

The destructor.

isCloned()

bool isCloned ( ) const

inline

Returns: true if this event has been cloned at least once.

Referenced by NegociateWindow::computeWirelength().

isValid()

bool isValid ( ) const

inline

Returns: true if the cached informations from the element are valid (i.e. the element has not been changed).

isUnimplemented()

bool isUnimplemented

(

)

const

Returns: true if the event has tried to use an unimplemented feature.

Referenced by Manipulator::canRipup().

isProcessed()

bool isProcessed ( ) const

inline

Returns: true if the event has been processed.

isDisabled()

bool isDisabled ( ) const

inline

Returns: true if the event is not the active one. It should be discarted by the algorithm.

isForcedToHint()

bool isForcedToHint ( ) const

inline

Returns: true the element must be placed exacltly on the given axis hint.

isRipedByLocal()

bool isRipedByLocal ( ) const

inline

Returns: true the element (global) has been riped up to place a local one.

getMode()

unsigned int getMode ( ) const

inline

Returns: the mode the event must be taken into account to.

canMinimize()

bool canMinimize ( ) const

inline

Returns: true the element could still be minimized.

Referenced by Manipulator::minimize().

getState()

unsigned int getState

(

)

const

Returns: the mode the router is currently in.

getKey()

const Key & getKey ( ) const

inline

Returns: The key to use in map & queue for this event.

getSegment()

TrackElement * getSegment ( ) const

inline

Returns: The associated segment.

Referenced by SegmentFsm::conflictSolveByHistory(), SegmentFsm::conflictSolveByPlaceds(), SegmentFsm::desaturate(), SegmentFsm::doActions(), SegmentFsm::insertInTrack(), Manipulator::ripupPerpandiculars(), SegmentFsm::SegmentFsm(), SegmentFsm::slackenTopology(), and SegmentFsm::solveFullBlockages().

getPerpandiculars()

const vector< TrackElement * > & getPerpandiculars ( ) const

inline

Returns: A vector of cached perpandiculars to the associated segment.

Referenced by Manipulator::minimize(), Manipulator::repackPerpandiculars(), and Manipulator::ripupPerpandiculars().

getAxisHint()

DbU::Unit getAxisHint ( ) const

inline

Returns: The preferred position for the segment axis.

Referenced by Manipulator::minimize(), Manipulator::ripple(), and SegmentFsm::SegmentFsm().

getAxisHistory()

DbU::Unit getAxisHistory ( ) const

inline

Returns: The previous position of the segment axis (before it's current position).

Referenced by Manipulator::minimize().

getAxisWeight()

DbU::Unit getAxisWeight ( DbU::Unit  axis ) const

inline

Returns: The distance between axis and the preferred position.

Referenced by SegmentFsm::SegmentFsm().

getConstraints()

const Interval & getConstraints ( ) const

inline

Returns: The range of legal positions for the axis.

Referenced by Manipulator::minimize(), Manipulator::ripupPerpandiculars(), and SegmentFsm::SegmentFsm().

getOptimal()

const Interval & getOptimal ( ) const

inline

Returns: The range of positions for the optimal axis (cached).

Referenced by SegmentFsm::SegmentFsm().

getPriority()

unsigned int getPriority ( ) const

inline

Returns: The priority of the event, it quantify the degree of freedom of the segment. Currently it's computed from the length of the segment and it's slack:

A high priority means that the segment will be harder to place thus it will be scheduled first. With this function, longer segments will be placed first.

getTracksNb()

unsigned int getTracksNb ( ) const

inline

Returns: The number of tracks avalaibles for the segment to be placed.

Referenced by SegmentFsm::SegmentFsm().

getInsertState()

unsigned int getInsertState ( ) const

inline

Returns

The kind of track insertion that will be intended. It's a counter whose values have the following meaning:

• 1 : normal insert.
• 2 : shrink the segment to it's minimum before inserting.
• 3 : attempt to ripup conflicting others before inserting.

Referenced by SegmentFsm::insertInTrack().

getEventLevel()

unsigned int getEventLevel ( ) const

inline

Returns: The event level of the event, used to tweak the order inside the event queue. It differs from the priority in the sense that it isn't a topologicaly based value, but manipulated by the algorithm.

Referenced by NegociateWindow::computeWirelength().

revalidate()

void revalidate

(

)

Perform an event revalidation.

Referenced by SegmentFsm::SegmentFsm().

updateKey()

void updateKey ( )

inline

Update the key with the new values from the event, the key must not be inserted in the queue when this method is called.

process()

void process	(	RoutingEventQueue &	queue,
		RoutingEventHistory &	history,
		RoutingEventLoop &	loop
	)

Parameters

queue	The main event queue.
history	The event's history list.
loop	The loop detector.

Process the event, that is:

• First, check if there is no looping, if any, do not process the event but dicard it (marked as unimplemented).
• Second, attempt to place the associated segment. Pass it to the relevant function, according to the router's mode (_processNegociate(), processPack() or _processRepair() ). Once processed, the event is added to both history (for the record) and loop to check if we are not looping.

setSegment()

void setSegment

(

TrackElement *

element

)

Change the associated segment. Used only by TrackSegment::swapTrack().

Referenced by TrackSegment::swapTrack().

reschedule()

RoutingEvent * reschedule	(	RoutingEventQueue &	queue,
		unsigned int	eventLevel
	)

Returns

The newly reinserted event. Depending on the cases it could be itself.

Insert or reinsert an event in the scheduler. The eventLevel parameter only allows to increase the level (if it is less than the current level of the event, it will be ignored).

Cloning Management. As an event could be cloned, if we try to re-insert a disabled original, we must first lookup the currently cloned active event. This is done through the associated segment which must always be associated with the active event (if any).

Unimplemented Protection. If the unimplemented flag is set the reschedule is cancelled (NULL is returned).

Unprocessed Event. The event is still in queue, waiting to be processed, then just repush it in the queue with it's new level.

Processed Event. Clone the already processed one, activate it and push it on the queue.

Router's Mode. The mode is also updated.

Referenced by NegociateWindow::computeWirelength(), SegmentAction::doAction(), and RoutingEvent::reschedule().

setMode()

void setMode

(

unsigned int

mode

)

Set the mode in which the event must be processed (see RoutingEvent::Mode).

Referenced by SegmentAction::doAction(), and RoutingEvent::reschedule().

setState()

void setState

(

unsigned int

state

)

Proxy mutator for DataNegociate::setState().

setAxisHintFromParent()

void setAxisHintFromParent

(

)

Sets the axis hint from it's parent segment. The parentage is found through the TrackSegment parentage.

incInsertState()

void incInsertState ( )

inline

Increment the insertion state.

See also:  RoutingEvent::getInsertState().

Referenced by SegmentFsm::insertInTrack().

resetInsertState()

void resetInsertState ( )

inline

Reset the insertion state.

See also:  RoutingEvent::getInsertState().

Referenced by SegmentFsm::slackenTopology().

setEventLevel()

void setEventLevel ( unsigned int  level )

inline

Set the event level (user-controlled re-ordering).

---

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

• RoutingEvent.h
• RoutingEvent.cpp
• RoutingEvent.dox