#11521: Memleak when resolving the action of Integers on an Elliptic Curve
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Reporter: jpflori | Owner: robertwb
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by SimonKing):
On the other hand, it could be that using weak keys in the homset cache
will not work: The keys are triples: domain, codomain and category.
What we want is: If either the domain or the codomain or the category have
no strong reference, then the homset can be garbage collected.
Hence: Why don't we use a dictionary of dictionaries of dictionaries?
What I mean is:
* The keys of sage.categories.homset._cache should be weak references to
the domain
* The values of sage.categories.homset._cache should be dictionaries
whose keys are weak references to the codomain.
* The keys of these dictionaries should be weak references to the
category, and the value a weak reference to the homset.
Hence, if there is no strong reference to either domain or codomain or
category, then the homset can be deallocated.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11521#comment:24>
Sage <http://www.sagemath.org>
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