Description

colesbury

opened on Jan 19, 2024

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Feature or enhancement

The free-threaded builds need a variant of PyList_GetItem that returns a strong reference instead of a borrowed reference for thread-safety reasons. PEP 703 proposed PyList_FetchItem, but since then PyDict_GetItemRef and functions with similar signatures have been added.

This proposes PyList_GetItemRef with the following signature:

PyObject *PyList_GetItemRef(PyObject *list, Py_ssize_t index)

Return a strong reference to the object at position index in the list pointed to by list. If index is out of bounds (<0 or >=len(list)), return NULL and set an IndexError. If list is not a list instance, return NULL and set a TypeError.

Linked PRs

• gh-114329: Add PyList_GetItemRef function #114504
• gh-114329: Fix PyList_GetItemRef() limited C API definition #117520

Activity

1. colesbury

   added

   type-featureA feature request or enhancementA feature request or enhancement

   topic-C-API

   3.13only security fixesonly security fixes

   topic-free-threading

   on Jan 19, 2024
2. colesbury commented on Jan 19, 2024

   

   colesbury

   on Jan 19, 2024

   ContributorAuthor

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   C-API working group issue: capi-workgroup/decisions#9
3. Eclips4 commented on Jan 19, 2024

   

   Eclips4

   on Jan 19, 2024

   Member

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   Just FYI, feature requests do not need version label :)

   Reacted by Sam Gross
4. Eclips4

   removed

   3.13only security fixesonly security fixes

   on Jan 19, 2024
5. colesbury

   added 2 commits that reference this issue on Jan 23, 2024

   pythongh-114329: Add `PyList_GetItemRef` function

   8f96d08

   Merge branch 'main' into pythongh-114329-list

   c045495
6. encukou

   added a commit that references this issue on Feb 2, 2024

   gh-114329: Add `PyList_GetItemRef` function (GH-114504)

   d0f1307
7. encukou commented on Feb 2, 2024

   

   encukou

   on Feb 2, 2024

   Member

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   Thank you!
8. encukou

   closed this as completedon Feb 2, 2024
9. aisk

   added a commit that references this issue on Feb 11, 2024

   pythongh-114329: Add `PyList_GetItemRef` function (pythonGH-114504)

   445e147
10. fsc-eriker

    added a commit that references this issue on Feb 14, 2024

    pythongh-114329: Add `PyList_GetItemRef` function (pythonGH-114504)

    d3c77d1
11. vstinner

    added 3 commits that reference this issue on Apr 3, 2024

    pythongh-114329: Fix PyList_GetItemRef() limited C API definition

    450b389

    pythongh-114329: Fix PyList_GetItemRef() limited C API definition

    934a220

    gh-114329: Fix PyList_GetItemRef() limited C API definition (#117520)

    2057c92
12. diegorusso

    added a commit that references this issue on Apr 17, 2024

    pythongh-114329: Fix PyList_GetItemRef() limited C API definition (py…

    47e396c

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