#include "SudokuTask.h"

#include <iostream>
using namespace std;

task* SudokuTask::execute() {
	int x=-1,y=-1;
	*subtasks=0;

	if (puzzle->nextfree(x,y)==true) {
		unsigned long childtasks[LENGTH]={0};
		int count=0;
		task_list list;

		for(int i=1;i<=LENGTH;i++) {
			if (puzzle->check(x,y,i)==true) {
				Sudoku* childpuzzle=new Sudoku(*puzzle);
				childpuzzle->at(x,y)=i;
				list.push_back(*new(allocate_child())SudokuTask(childpuzzle,childtasks+count));
				count++;
			}
		}
		if (count>0) {
			set_ref_count(count+1);
			spawn_and_wait_for_all(list);
			for(int i=0;i<LENGTH;i++)
				*subtasks+=childtasks[i];
			*subtasks+=count;
		}
	} else {
		cout << "Solution found." << endl;
		puzzle->print();
	}

	return NULL;
}