Function GraphIterator_Next

src/globals.c:311–330

advance iterator returns graph object in case iterator isn't depleted, otherwise returns NULL

// advance iterator
// returns graph object in case iterator isn't depleted, otherwise returns NULL
GraphContext *GraphIterator_Next
(
	KeySpaceGraphIterator *it  // iterator to advance
) {
	ASSERT(it != NULL);

	GraphContext *gc = NULL;

	pthread_rwlock_rdlock(&_globals.lock);

	if(it->idx < array_len(_globals.graphs_in_keyspace)) {
		// prepare next call
		gc = _globals.graphs_in_keyspace[it->idx++];
		GraphContext_IncreaseRefCount(gc);
	}

	pthread_rwlock_unlock(&_globals.lock);

	return gc;
}