Gliph\Graph\AdjacencyList::getTraversableSplos PHP Method

AdjacencyList Trait Documentation Show file Open project: sdboyer/gliph

getTraversableSplos() protected method

This would otherwise occur if nested calls are made that traverse the same SPLOS. This keeps track of which SPLOSes are currently being traversed, and if it's in use, it returns a clone. It is incumbent on the calling code to release the semaphore directly by calling $this->walking->detach($splos) when the traversal in question is complete. (This is very important!)
protected getTraversableSplos ( SplObjectStorage $splos ) : SplObjectStorage
$splos SplObjectStorage The SPLOS to traverse.
return SplObjectStorage A SPLOS that is safe for traversal; may or may not be a clone of the original. 
    protected function getTraversableSplos(\SplObjectStorage $splos)
    {
        if ($this->walking->contains($splos)) {
            return clone $splos;
        } else {
            $this->walking->attach($splos);
            return $splos;
        }
    }
AdjacencyList
__construct
ensureVertex
getTraversableSplos
hasVertex
order
size
vertices