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authorAndrew Tridgell <tridge@samba.org>2009-07-01 14:53:01 +1000
committerAndrew Tridgell <tridge@samba.org>2009-07-01 15:15:37 +1000
commit5fe1d8dc1275e43d96da1297f5fb0d0088a1c3ab (patch)
treeca520776101c3ff64fa76d01d088c565ea265d5a /source4/smb_server
parent6a192020a230ab8e085f32b5559c0fe0d2f5c1a4 (diff)
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changes to remove the ambiguity in talloc_free() and talloc_steal()
These changes follow from the discussions on samba-technical. The changes are in several parts, and stem from the inherent ambiguity that was in talloc_free() and talloc_steal() when the pointer that is being changes has more than one parent, via references. The changes are: 1) when you call talloc_free() on a pointer with more than one parent the free will fail, and talloc will log an error to stderr like this: ERROR: talloc_free with references at some/foo.c:123 reference at other/bar.c:201 reference at other/foobar.c:641 2) Similarly, when you call talloc_steal() on a pointer with more than one parent, the steal will fail and talloc will log an error to stderr like this: ERROR: talloc_steal with references at some/foo.c:123 reference at other/bar.c:201 3) A new function talloc_reparent() has been added to change a parent in a controlled fashion. You need to supply both the old parent and the new parent. It handles the case whether either the old parent was a normal parent or a reference The use of stderr in the logging is ugly (and potentially dangerous), and will be removed in a future patch. We'll need to add a debug registration function to talloc.
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