def run(self):
while True:
time.sleep(.1)
self.screen.fill(self.bg)
#Entering critical section if:
#all OKs have been received
if not mutex.ok_list:
#the queue is built and not in critical section
if mutex.queue and not self.critical:
#and you are the first element in the queue
if mutex.queue[0][0] == mutex.queue_id and mutex.queue[0][1] == self.seg_id:
self.critical = True
self.countdown = float(random.randint(3,5))
self.bg = (0, 255, 0)
#receive OKs and resend request if timeout
else:
self.ok_countdown -= .1
if self.ok_countdown <= 0:
mutex.send_request([mutex.queue_id], self.seg_id, self.seg_dic, True)
self.ok_countdown = self.OK_COUNT_TIMEOUT
#Critical section
if self.critical:
self.countdown -= .1
#when finished send release message and a new request
if self.countdown <= 0:
self.countdown = 0
self.critical = False
mutex.send_release(self.clock, self.seg_id, mutex.queue_id)
self.clock[0] += 1
mutex.send_request(self.clock, self.seg_id, self.seg_dic)
self.bg = (0,0,0)
# Display info
self.print_text('ID: ' + str(self.seg_id), 0, 0)
self.print_text('NUMSEG: ' + str(len(self.seg_dic.keys())), 0, 25)
self.print_text('CLOCK: ' + str(self.clock[0]), 0, 50)
self.print_text('QUEUE ID: ' + str(mutex.queue_id), 0, 75)
self.print_text('QUEUE: ' + str(mutex.queue), 0, 100)
# Display queue position or countdown if it is in critical section
big_number = 0
if self.critical:
big_number = self.countdown
elif (mutex.queue_id, self.seg_id) in mutex.queue:
big_number = mutex.queue.index((mutex.queue_id, self.seg_id))
self.print_text(str(big_number), 130, 10, False)
pygame.display.flip()
for event in pygame.event.get():
if event.type == pygame.QUIT:
os._exit(1)