| """ |
| Objective-C runtime wrapper for use by LLDB Python formatters |
| |
| part of The LLVM Compiler Infrastructure |
| This file is distributed under the University of Illinois Open Source |
| License. See LICENSE.TXT for details. |
| """ |
| import metrics |
| |
| class Cache: |
| def __init__(self): |
| self.data = {} |
| self.statistics = metrics.Metrics() |
| self.statistics.add_metric('hit') |
| self.statistics.add_metric('miss') |
| |
| def look_for_key(self,key): |
| if key in self.data: |
| return True |
| return False |
| |
| def add_item(self,key,value,ok_to_replace=True): |
| if not(ok_to_replace) and self.look_for_key(key): |
| return False |
| self.data[key] = value |
| return True |
| |
| def get_value(self,key,default=None): |
| if self.look_for_key(key): |
| self.statistics.metric_hit('hit',key) |
| return self.data[key] |
| else: |
| self.statistics.metric_hit('miss',key) |
| return default |
| |
