[gentoo-commits] proj/R_overlay:master commit in: roverlay/util/

["André Erdmann" <dywi@mailerd.de>]

commit:     ea52078df34aab6562e49a73844e295d934a440d
Author:     André Erdmann <dywi <AT> mailerd <DOT> de>
AuthorDate: Thu Sep 12 16:29:57 2013 +0000
Commit:     André Erdmann <dywi <AT> mailerd <DOT> de>
CommitDate: Thu Sep 12 16:29:57 2013 +0000
URL:        http://git.overlays.gentoo.org/gitweb/?p=proj/R_overlay.git;a=commit;h=ea52078d

roverlay/util/objects, NoneRef: get_static()

---
 roverlay/util/objects.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/roverlay/util/objects.py b/roverlay/util/objects.py
index a20b707..5ba2d69 100644
--- a/roverlay/util/objects.py
+++ b/roverlay/util/objects.py
@@ -66,6 +66,16 @@ class SafeWeakRef ( weakref.ref ):
 class NoneRef ( object ):
    """A 'reference' to None (compat object)."""
 
+   __instance = None
+
+   @classmethod
+   def get_static ( cls, obj=None ):
+      assert obj is None
+      if cls.__instance is None:
+         cls.__instance = cls ( obj=obj )
+      return cls.__instance
+   # --- end of get_static (...) ---
+
    def __init__ ( self, obj=None ):
       super ( NoneRef, self ).__init__()
       assert obj is None
@@ -101,7 +111,7 @@ def get_object_ref ( obj ):
    * obj --
    """
    if obj is None:
-      return NoneRef()
+      return NoneRef.get_static()
    elif isinstance ( obj, ( SafeWeakRef, NoneRef, weakref.ref ) ):
       return obj
    elif hasattr ( obj, 'get_ref' ):