The Flowgraph

The flowgraph is just a graph (blocks and edges), but with some additional methods so that it can be used as the highest level of execution

Flowgraph derives from graph, as it is used to connect blocks together, and start and stop execution. It is also given a scheduler object(s) to handle execution of the flowgraph

The constructor only consists of a name, but the main interface methods are (as they wrap runtime):

void start();
void stop();
void wait();

check_connections

Static method used ensure that a graph is connected correctly. This method also sets itemsizes of ports that are previously set to 0 by inferring the size based on connected ports.

make_flat

Used to return the flattened representation of the graph

start/stop/wait

If using the default runtime, passes through start/stop/wait to the runtime object (and subsequently the runtime monitor)

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As you can see, there is not much involved in the flowgraph classes, and all of the functionality comes from its parent classes (e.g. graph/node), and the schedulers.

Since flowgraph derives from graph, the connect() API is used to create edges and build a graph. This graph is then flattened and handed off to the scheduler.