Function solve

examples/sudoku.cpp:370–396

}

std::tuple<unsigned, unsigned, unsigned, std::chrono::steady_clock::duration>
solve(stdexec::parallel_scheduler sch, unsigned short const *init_values)
{
  nSols  = 0;
  nTasks = 0;
  nRaces = 0;
  std::unique_ptr<board_element[]> start_board{new board_element[BOARD_SIZE]};
  init_board(start_board.get(), init_values);
  auto                         start = std::chrono::steady_clock::now();
  stdexec::inplace_stop_source stop;
  auto                         canceled = []()
  {
    if (verbose)
    {
      printf("\ncanceled \n\n");
    }
  };
  stdexec::inplace_stop_token::template callback_type<decltype(canceled)> callback(stop.get_token(),
                                                                                   canceled);
  stdexec::simple_counting_scope                                          scope;
  spawn_partial_solve(sch, scope, stop, std::move(start_board), 0);
  stdexec::sync_wait(scope.join());
  return std::make_tuple((unsigned) nSols,
                         (unsigned) nTasks,
                         (unsigned) nRaces,
                         std::chrono::steady_clock::now() - start);
}

using double_sec = std::chrono::duration<double>;