cpython: d6ad9d7468f7 (original) (raw)

Mercurial > cpython

changeset 84057:d6ad9d7468f7

Issue #15528: Delay importing atexit until weakref.finalize() used. [#15528]

Richard Oudkerk shibturn@gmail.com
date	Sat, 08 Jun 2013 16:52:29 +0100
parents	0be613638523
children	d1b5e41acf28
files	Lib/weakref.py
diffstat	1 files changed, 7 insertions(+), 3 deletions(-)[+] [-] Lib/weakref.py 10

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line diff

--- a/Lib/weakref.py +++ b/Lib/weakref.py @@ -23,7 +23,6 @@ from _weakrefset import WeakSet, _Iterat import collections # Import after _weakref to avoid circular import. import sys import itertools -import atexit ProxyTypes = (ProxyType, CallableProxyType) @@ -464,11 +463,18 @@ class finalize: _shutdown = False _index_iter = itertools.count() _dirty = False

_registered_with_atexit = False

class _Info: slots = ("weakref", "func", "args", "kwargs", "atexit", "index") def init(self, obj, func, *args, **kwargs):

   if not self._registered_with_atexit:[](#l1.21)

       # We may register the exit function more than once because[](#l1.22)

       # of a thread race, but that is harmless[](#l1.23)

```
       import atexit[](#l1.24)
```

       atexit.register(self._exitfunc)[](#l1.25)

       finalize._registered_with_atexit = True[](#l1.26)
   info = self._Info()[](#l1.27)
   info.weakref = ref(obj, self)[](#l1.28)
   info.func = func[](#l1.29)

@@ -569,5 +575,3 @@ class finalize: finalize._shutdown = True if reenable_gc: gc.enable() - -atexit.register(finalize._exitfunc)