org.jikesrvm.compilers.opt.util
Interface TopSortInterface

All Known Implementing Classes:

AnnotatedLSTGraph, CoalesceGraph, ControlFlowGraph, DepGraph, LSTGraph, SpaceEffGraph

public interface TopSortInterface

Interface to allow building top-sort, by calling TopSort.buildTopSort() 5/25/1999

startNode

SortedGraphNode startNode(boolean forward)

Return the start node if forward = true for forward topsort, and return the end node if forward = false for backward topsort.

Parameters:

forward - whether we are viewing the graph in the forward direction

Returns:

the start node if forward = true for forward topsort, the end node if forward = false for backward topsort.

numberOfNodes

int numberOfNodes()

Return the number of nodes in the graph

Returns:

the number of nodes in the graph

isTopSorted

boolean isTopSorted(boolean forward)

Return true if no resetTopSorted(forward) has been executed since the last setTopSorted(forward) has been executed

Parameters:

forward - whether we are viewing the graph in the forward direction

Returns:

true if no resetTopSorted(forward) has been executed since the last setTopSorted(forward) has been executed

setTopSorted

void setTopSorted(boolean forward)

Should have a side effect such that isTopSorted(forward) returns the correct value.

Parameters:

forward - whether we are viewing the graph in the forward direction

resetTopSorted

void resetTopSorted()

Should have a side effect such that isTopSorted(forward) returns the correct value.