有一类线程需要满足条件之后才能够继续执行,Python提供了threading.Condition 对象用于条件变量线程的支持,它除了能提供RLock()或Lock()的方法外,还提供了 wait()、notify()、notifyAll()方法。 lock_con=threading.Condition([Lock/Rlock]): 锁是可选选项,不传人锁,对象自动创建一个RLock()。 wait():条件不满足...
wait() print('thread2 acquires lock again.') # 唤醒t1 cndition.notify() # 释放锁 cndition.release() if __name__ == '__main__': cndition = threading.Condition() t1 = threading.Thread(target=fun, args=(cndition,)) t2 = threading.Thread(target=fun2, args=(cndition,)) t1.start...
notifyAll(): 如果wait状态线程比较多,notifyAll的作用就是通知所有线程(这个一般用得少) lock_con=threading.Condition([Lock/Rlock]): 锁是可选选项, 默认创建一个RLock(),一般都用默认。 importthreading,timefromrandomimportrandintclassProducer(threading.Thread):defrun(self):globalLwhileTrue: val=randint(0...
# 生成一个条件锁对象 cond = threading.Condition() # 上锁 cond.acquire() # 解锁 cond.release() # 挂起线程,直到收到一个 notify 通知才会被唤醒 cond.wait() # 唤醒一个 Condition 的 waiting 池中的线程 cond.notify() # 唤醒所有 Condition 的 waiting 池中的线程 cond.notify_all() 我们来看一...
Condition提供了Lock类中的acquire()方法和release()方法 notify(self, n=1) 唤醒n个等待的线程 notify_all(self) 唤醒所有等待的线程 wait(self, timeout=None) 使当前线程进入等待池,在timeout时间之后自动唤醒,timeout=None时候就只能等待别的线程调用notify()来唤醒 ...
import threading from threading import Condition # condition class XiaoAi(threading.Thread): def __init__(self, cond): self.cond = cond super().__init__(name="xiaoai") def run(self): self.cond.acquire() self.cond.wait() print('{}:ennn. '.format(self.name)) self.cond.notify()...
condition.release() threads = [] for i in range(1, 11): t = threading.Thread(name="运动员" + str(i), target=wait_and_run) threads.append(t) def fire(): condition.acquire() print("预备") condition.notify_all() condition.wait(1) ...
con=threading.Condition()meat_num=0defthread_consumers():# 条件变量condition 线程上锁 con.acquire()# 全局变量声明关键字 global global meat_num meat_num=0# 等待肉片下锅煮熟 con.wait()whileTrue:print("我来一块肉片...")meat_num-=1print("剩余肉片数量:%d"%meat_num)time.sleep(0.5)ifmeat_...
self.condition.wait()if__name__ =='__main__': condition = threading.Condition() boy_thread = Boy('男', condition) girl_thread = Girl('女', condition) boy_thread.start() girl_thread.start() Condition的底层实现了__enter__和 __exit__协议.所以可以使用with上下文管理器 ...
randint(100, 1000) while money > gMoney: if gTimes > totalTimes: return print('消费者想要消费%s, 余额不足%s,等待...' % (money, gMoney)) gCondition.wait() gMoney -= money print('消费者%s消费了%s元' % (threading.current_thread(), money)) time.sleep(0.5) def main(): for x ...