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使用信号量允许运行一个主线程或一组其他线程
原标题:Using semaphores to allow either a main thread to run or a group of other threads to run

我有一个主线程,它创建了n个新线程来执行一些子任务,但我只希望主代码在n个线程被锁定时执行,并且当主线程处于睡眠状态时,n个线程运行。

def main_thread(n):
    sem = threading.Semaphore(n)

    for i in n:
        thread = threading.Thread(target=threading_fun, args=(sem,))
        thread.start()

    while True:
        time.sleep(60)

        for i in n:
            sem.acquire()

        # do something
        sem.release(n)


def thread_fun(sem):
    while True:
        sem.acquire()
        # do something
        sem.release()

现在,我在Python中使用信号量实现了这一目标,但我想知道是否有更好的方法。主要是,我很好奇是否有办法在主线程中获取信号量n次。

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