[Python-checkins] peps: Mention the new bit in the GC header

[antoine.pitrou]

http://hg.python.org/peps/rev/c9440776e935
changeset:   4892:c9440776e935
user:        Antoine Pitrou <solipsis at pitrou.net>
date:        Fri May 17 23:30:10 2013 +0200
summary:
  Mention the new bit in the GC header

files:
  pep-0442.txt |  7 ++++++-
  1 files changed, 6 insertions(+), 1 deletions(-)


diff --git a/pep-0442.txt b/pep-0442.txt
--- a/pep-0442.txt
+++ b/pep-0442.txt
@@ -82,7 +82,7 @@
 While this PEP discusses CPython-specific implementation details, the
 change in finalization semantics is expected to affect the Python
 ecosystem as a whole.  In particular, this PEP obsoletes the current
-guideline that "objects with a __del__ method should not be part of a
+guideline that "objects with a ``__del__`` method should not be part of a
 reference cycle".
 
 
@@ -170,6 +170,11 @@
 ``tp_del`` is not encountered anymore in the CPython source tree (except
 for testing purposes).
 
+On the internal side, a bit is reserved in the GC header for GC-managed
+objects to signal that they were finalized.  This helps avoid finalizing
+an object twice (and, especially, finalizing a CT object after it was broken
+by the GC).
+
 
 Discussion
 ==========

-- 
Repository URL: http://hg.python.org/peps