| """ |
| Objective-C runtime wrapper for use by LLDB Python formatters |
| |
| Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| See https://llvm.org/LICENSE.txt for license information. |
| SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| """ |
| import lldb.formatters.metrics |
| |
| |
| class Cache: |
| |
| def __init__(self): |
| self.data = {} |
| self.statistics = lldb.formatters.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 |
