// Defined in header <oneapi/tbb/flow_graph.h>

namespace oneapi {
namespace tbb {
namespace flow {

    class graph {
    public:
        graph();
        graph(task_group_context& context);
        ~graph();

        void wait_for_all();

        void reset(reset_flags f = rf_reset_protocol);
        void cancel();
        bool is_cancelled();
        bool exception_thrown();
    };

} // namespace flow
} // namespace tbb
} // namespace oneapi

reset_flags_enum.rst

Constructs a graph with no nodes. If ``context`` is specified, the
graph tasks are executed in this context. By default, the graph is
executed in a bound context of its own.

Calls ``wait_for_all()`` on the graph, then destroys the graph.

Blocks execution until all tasks associated with the graph have completed or cancelled.

Resets the graph according to the specified flags.
Flags to ``reset()`` can be combined with bitwise-``or``.

.. note::

    ``reset()`` is a thread-unsafe operation, don't call it concurrently.

Cancels all tasks in the graph.

Returns: ``true`` if the graph was cancelled during the last call to
``wait_for_all()``; ``false``, otherwise.

Returns: ``true`` if during the last call to ``wait_for_all()`` an
exception was thrown; ``false``, otherwise.