#11521: Use weak references to cache homsets
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Reporter: jpflori | Owner: robertwb
Type: defect | Status: needs_work
Priority: major | Milestone: sage-5.4
Component: coercion | Resolution:
Keywords: sd35 | Work issues: Test
activity of weak references if addresses coincide
Report Upstream: N/A | Reviewers: Jean-Pierre
Flori, Nils Bruin
Authors: Simon King | Merged in:
Dependencies: #12969; to be merged with #715 | Stopgaps:
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Changes (by SimonKing):
* status: positive_review => needs_work
* work_issues: => Test activity of weak references if addresses coincide
Comment:
See my comment at
[http://trac.sagemath.org/sage_trac/ticket/13370#comment:17 13370]: To be
on the safe side, i.e., in order to avoid that a key is deallocated but
its callback function isn't called, one could/should first look at the
memory address, and then (if the addresses coincide) test whether the
stored weak reference is still active. Namely, if it isn't then the new
key is ''really'' new, even though using an old address.
Hence, I'd like to put this and #715 to "needs work".
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11521#comment:160>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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