| """ | |
| 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 | |