停止整个生产者线程和消费者线程，并将控制权交给主线程

import threading

# 互斥锁，用于线程同步
lock = threading.Lock()

# 标志变量，用于指示是否停止线程的执行
stop_threads = False

# 生产者线程
def producer_thread():
    global stop_threads
    while not stop_threads:
        with lock:
            # 生产者线程的执行代码
            pass

# 消费者线程
def consumer_thread():
    global stop_threads
    while not stop_threads:
        with lock:
            # 消费者线程的执行代码
            pass

# 主线程
def main_thread():
    global stop_threads
    # 创建并启动生产者线程和消费者线程
    producer = threading.Thread(target=producer_thread)
    consumer = threading.Thread(target=consumer_thread)
    producer.start()
    consumer.start()

    # 停止生产者线程和消费者线程的执行
    stop_threads = True

    # 等待生产者线程和消费者线程的结束
    producer.join()
    consumer.join()

# 启动主线程
main_thread()