Python locks can be extracted independently.
| The code is as follows |
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Mutex = Threading. Lock ()
Use of Locks #创建锁
Mutex = Threading. Lock ()
#锁定
Mutex.acquire ([timeout])
#释放
Mutex.release () |
The locking method acquire can have an optional parameter timeout for a time-out period. If timeout is set, the return value can be used to determine if a lock has been obtained, allowing some other processing to be done.
| The code is as follows |
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| #!/usr/bin/env python
#coding =utf-8
Import threading
Import time
Class Mythread (threading. Thread):
def run (self):
Global num
Time.sleep (1)
If Mutex.acquire (1):
num = num+1
msg = self.name+ ' Set num to ' +str (num)
Print msg
Mutex.release ()
num = 0
Mutex = Threading. Lock ()
def test ():
For I in range (5):
t = Mythread ()
T.start ()
if __name__ = = ' __main__ ':
Test ()
Thread-1 Set num to 1
Thread-3 Set num to 2
Thread-4 Set num to 3
Thread-5 Set num to 4
Thread-2 Set num to 5 |
