Source Code for Module qm.lock

 1  ######################################################################## 
 2  # 
 3  # File:   lock.py 
 4  # Author: Mark Mitchell 
 5  # Date:   07/03/2002 
 6  # 
 7  # Contents: 
 8  #   Lock 
 9  # 
10  # Copyright (c) 2002 by CodeSourcery, LLC.  All rights reserved.  
11  # 
12  # For license terms see the file COPYING. 
13  # 
14  ######################################################################## 
15   
16  ######################################################################## 
17  # Notes 
18  ######################################################################## 
19   
20  # On systems that do not support threads, Threading.Lock() is 
21  # unavailable.  This module provides a class with the same interface 
22  # that works on systems without threads. 
23   
24  try: 
25      import thread 
26      from threading import Lock, RLock 
27  except: 
28   
29 -    class Lock: 
30   
31 -        def acquire(blocking = 1): 
32              # The lock can always be acquired. 
33              pass 
34   
35 -        def release(): 
36              # There is nothing to do to release the lock. 
37              pass 
38   
39   
40   
41 -    class RLock(Lock): 
42   
43          pass 
44