From 7c026742048b7b148457f5dcd858b618bf1cad15 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Tue, 24 Jun 2008 22:30:48 +0000
Subject: Use weakref.WeakValueDictionary to make cached Atom instances
 eligible for garbage collection when no strong references remain.

svn path=/main/trunk/; revision=10772
---
 pym/portage/dep.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pym/portage/dep.py b/pym/portage/dep.py
index 3d3b5d954..41d6b128b 100644
--- a/pym/portage/dep.py
+++ b/pym/portage/dep.py
@@ -19,6 +19,7 @@
 #
 
 import re, sys, types
+import weakref
 from itertools import chain
 import portage.exception
 from portage.exception import InvalidData, InvalidAtom
@@ -412,7 +413,7 @@ class Atom(object):
 	"""
 
 	__metaclass__ = _AtomCache
-	_atoms = {}
+	_atoms = weakref.WeakValueDictionary()
 
 	_str_methods = ("endswith", "find", "index", "lstrip", "replace",
 		"startswith", "strip", "rindex", "rfind", "rstrip", "__getitem__",
-- 
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