Mercurial > public > mercurial-scm > hg-stable
comparison mercurial/util.py @ 40897:0c638ff69f5c
util: add method to peek item in lrucachedict
I want a function that doesn't unnecessarily update the internal state of
the cache dict after fork().
| author | Yuya Nishihara <yuya@tcha.org> |
|---|---|
| date | Wed, 31 Oct 2018 22:29:05 +0900 |
| parents | 475921a3028c |
| children | 7cda0cacbbf6 |
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| 40896:2525faf4ecdb | 40897:0c638ff69f5c |
|---|---|
| 1333 | 1333 |
| 1334 def get(self, k, default=None): | 1334 def get(self, k, default=None): |
| 1335 try: | 1335 try: |
| 1336 return self.__getitem__(k) | 1336 return self.__getitem__(k) |
| 1337 except KeyError: | 1337 except KeyError: |
| 1338 return default | |
| 1339 | |
| 1340 def peek(self, k, default=_notset): | |
| 1341 """Get the specified item without moving it to the head | |
| 1342 | |
| 1343 Unlike get(), this doesn't mutate the internal state. But be aware | |
| 1344 that it doesn't mean peek() is thread safe. | |
| 1345 """ | |
| 1346 try: | |
| 1347 node = self._cache[k] | |
| 1348 return node.value | |
| 1349 except KeyError: | |
| 1350 if default is _notset: | |
| 1351 raise | |
| 1338 return default | 1352 return default |
| 1339 | 1353 |
| 1340 def clear(self): | 1354 def clear(self): |
| 1341 n = self._head | 1355 n = self._head |
| 1342 while n.key is not _notset: | 1356 while n.key is not _notset: |