[英]Implementing Barrier in Python2.7
我使用屏障在Python3中实现了此代码。 我想在Python2.7中获得相同的功能,但是我不知道要使用哪个同步原语,因为Python2.7中没有障碍
import threading
import time
from threading import Thread,Barrier
b = Barrier(2, timeout=50)
def func1():
time.sleep(3)
b.wait()
print('Working from func1')
return
def func2():
time.sleep(5)
b.wait()
print('Working from func2')
return
if __name__ == '__main__':
Thread(target = func1).start()
Thread(target = func2).start()
您可以使用信号量模拟障碍。 看一下: 使用信号量实现N进程障碍
问题是它没有超时参数,可能使用条件...
import time
from threading import Thread,Semaphore
class Barrier:
def __init__(self, n):
self.n = n
self.count = 0
self.mutex = Semaphore(1)
self.barrier = Semaphore(0)
def wait(self):
self.mutex.acquire()
self.count = self.count + 1
self.mutex.release()
if self.count == self.n: self.barrier.release()
self.barrier.acquire()
self.barrier.release()
b = Barrier(2)
def func1():
time.sleep(3)
#
b.wait()
#
print('Working from func1')
return
def func2():
time.sleep(5)
#
b.wait()
#
print('Working from func2')
return
if __name__ == '__main__':
Thread(target = func1).start()
Thread(target = func2).start()
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