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GitHub Repository: jackfrued/Python-100-Days
 Path: blob/master/Day01-15/code/Day13/test2.py
Views: 729
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import time

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from threading import Thread, Lock

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class Account(object):

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    def __init__(self, balance=0):

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        self._balance = balance

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        self._lock = Lock()

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    @property

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    def balance(self):

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        return self._balance

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    def deposit(self, money):

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        # 当多个线程同时访问一个资源的时候 就有可能因为竞争资源导致资源的状态错误

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        # 被多个线程访问的资源我们通常称之为临界资源 对临界资源的访问需要加上保护

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        if money > 0:

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            self._lock.acquire()

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            try:

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                new_balance = self._balance + money

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                time.sleep(0.01)

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                self._balance = new_balance

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            finally:

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                self._lock.release()

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class AddMoneyThread(Thread):

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    def __init__(self, account):

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        super().__init__()

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        self._account = account

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    def run(self):

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        self._account.deposit(1)

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def main():

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    account = Account(1000)

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    tlist = []

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    for _ in range(100):

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        t = AddMoneyThread(account)

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        tlist.append(t)

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        t.start()

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    for t in tlist:

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        t.join()

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    print('账户余额: %d元' % account.balance)

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if __name__ == '__main__':

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    main()

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