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bpo-31558: Add gc.freeze() (#3705)

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Freeze all the objects tracked by gc - move them to a permanent generation
and ignore all the future collections. This can be used before a POSIX
fork() call to make the gc copy-on-write friendly or to speed up collection.
This commit is contained in:
brainfvck 2017-10-16 12:49:41 -07:00 • committed by Łukasz Langa
parent bdaeb7d237
commit c75edabbb6
5 changed files with 169 additions and 2 deletions
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6
Lib/test/test_gc.py
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@ -734,6 +734,12 @@ class GCTests(unittest.TestCase):
self.assertEqual(new[1]["collections"], old[1]["collections"])
self.assertEqual(new[2]["collections"], old[2]["collections"] + 1)
def test_freeze(self):
gc.freeze()
self.assertGreater(gc.get_freeze_count(), 0)
gc.unfreeze()
self.assertEqual(gc.get_freeze_count(), 0)
class GCCallbackTests(unittest.TestCase):
def setUp(self):