# flow_control¶

[algorithms.parallel_pipeline.flow_control]

Enables the first filter in a composite filter to indicate when the end of input stream is reached.

Template function parallel_pipeline passes a flow_control object to the functor of the first filter. When the functor reaches the end of its input stream, it should invoke fc.stop() and return a dummy value that will not be passed to the next filter.

// Defined in header <tbb/parallel_pipeline.h>

namespace tbb {

class flow_control {
public:
void stop();
};

}


## Member functions¶

void stop()

Indicates that first filter of the pipeline reaches the end of its output.