def CPU_move():
board = deepcopy(BOARD) # make copy of original board to simulate plays
message = Message(EVENT.SEND_BOARD, board)
comm.bcast(message.to_dict(), root=MASTER_PID)
tasks = helpers.generate_tasks(BOARD.total_columns, DEPTH)
results = dict()
for i in range(1, BOARD.total_columns + 1):
results[i] = list()
while len(tasks):
status = MPI.Status()
# wait on message from any worker
data = comm.recv(source=MPI.ANY_SOURCE, status=status)
# parse message
message = Message.from_dict(data)
# get ready worker ID
from_pid = status.Get_source()
if message.type == EVENT.SEND_TASK:
# if message was request for task
send_task_msg = Message(EVENT.SEND_TASK, tasks.pop())
# send that worker next task
helpers.send_msg_to_worker(send_task_msg, from_pid)
if message.type == EVENT.SEND_RESULT:
data = message.payload # [result, column]
results[data[1]].append(data[0])
message_board_complete = Message(EVENT.BOARD_COMPLETE)
for pid in range(1, SIZE):
helpers.send_msg_to_worker(message_board_complete, pid)
return helpers.calculate_best_move(results)
def worker_process():
while True:
data = comm.bcast(None, root=0)
board_message = Message.from_dict(data)
if board_message.type == EVENT.SEND_BOARD:
# get board copy from payload
board: Board = board_message.payload
while True:
# send request for task
helpers.send_msg_to_master(Message(EVENT.SEND_TASK))
# receive task
task_message = helpers.recv_msg(MASTER_PID)
# if current move is calculated, go request new board
if task_message.type == EVENT.BOARD_COMPLETE:
break
moves_made = 0
last_mover = Mover.CPU
tasks: List = task_message.payload
for i, move in enumerate(tasks):
# play moves from task and check if move leeds to game over
mover = Mover.CPU if i % 2 == 0 else Mover.PLAYER
if board.is_move_legal(move):
board.move(move, mover)
moves_made += 1
last_mover = mover
if board.is_game_over():
send_result = Winner.CPU if mover == Mover.CPU else Winner.PLAYER
helpers.send_msg_to_master(
Message(EVENT.SEND_RESULT,
(send_result, tasks[0])))
break
result = board.evaluate(last_mover, DEPTH - len(tasks))
helpers.send_msg_to_master(
Message(EVENT.SEND_RESULT, (result, tasks[0])))
for _ in range(moves_made):
board.undo_move() # clean moves
time.sleep(1) # only while waiting for board