Source Code for Module lldb.formatters.cache

 1  """ 
 2  Objective-C runtime wrapper for use by LLDB Python formatters 
 3   
 4  part of The LLVM Compiler Infrastructure 
 5  This file is distributed under the University of Illinois Open Source 
 6  License. See LICENSE.TXT for details. 
 7  """ 
 8  import lldb.formatters.metrics 
 9   
10   
11 -class Cache: 
12   
13 -    def __init__(self): 
14          self.data = {} 
15          self.statistics = lldb.formatters.metrics.Metrics() 
16          self.statistics.add_metric('hit') 
17          self.statistics.add_metric('miss') 
18   
19 -    def look_for_key(self, key): 
20          if key in self.data: 
21              return True 
22          return False 
23   
24 -    def add_item(self, key, value, ok_to_replace=True): 
25          if not(ok_to_replace) and self.look_for_key(key): 
26              return False 
27          self.data[key] = value 
28          return True 
29   
30 -    def get_value(self, key, default=None): 
31          if self.look_for_key(key): 
32              self.statistics.metric_hit('hit', key) 
33              return self.data[key] 
34          else: 
35              self.statistics.metric_hit('miss', key) 
36              return default 
37