using namespace ARDOUR;
-GraphNode::GraphNode (graph_ptr_t graph)
+GraphNode::GraphNode (boost::shared_ptr<Graph> graph)
: _graph(graph)
-{
+{
+}
+
+GraphNode::~GraphNode()
+{
}
void
GraphNode::prep (int chain)
{
+ /* This is the number of nodes that directly feed us */
_refcount = _init_refcount[chain];
}
+/** Called by another node to tell us that one of the nodes that feed us
+ * has been processed.
+ */
void
GraphNode::dec_ref()
{
- if (g_atomic_int_dec_and_test (&_refcount))
+ if (g_atomic_int_dec_and_test (&_refcount)) {
+ /* All the nodes that feed us are done, so we can queue this node
+ for processing.
+ */
_graph->trigger (this);
+ }
}
void
node_set_t::iterator i;
bool feeds_somebody = false;
+ /* Tell the nodes that we feed that we've finished */
for (i=_activation_set[chain].begin(); i!=_activation_set[chain].end(); i++) {
(*i)->dec_ref();
feeds_somebody = true;
}
if (!feeds_somebody) {
+ /* This node does not feed anybody, so decrement the graph's finished count */
_graph->dec_ref();
}
}