52 lines
1.2 KiB
Python
52 lines
1.2 KiB
Python
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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