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gh-146636: Add Free-threaded Stable ABI migration guide #148453

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2fbc5eb
Add reference to freethreading-stable-abi-howto
clin1234 Apr 12, 2026
367ef68
Add documentation for Free Threading Stable ABI usage
clin1234 Apr 12, 2026
0e89d37
Update documentation on PyObject opaqueness and module init
clin1234 Apr 12, 2026
e8bdfc6
Fix formatting for PyObject opaqueness section
clin1234 Apr 12, 2026
130d126
Fix formatting of code snippet in documentation
clin1234 Apr 12, 2026
62e4d04
Update documentation on PyObject opaqueness
clin1234 Apr 12, 2026
bedbf04
Py_Type
clin1234 Apr 12, 2026
a91024a
Clarify free-threaded limited API build documentation
clin1234 Apr 12, 2026
cfcef79
Revise freethreading-stable-abi.rst for clarity
clin1234 Apr 12, 2026
b8b5277
Add freethreading-stable-abi.rst to documentation index
clin1234 Apr 12, 2026
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Py_Type 
Co-authored-by: da-woods <[email protected]>
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@clin1234 @da-woods
clin1234 and da-woods authored Apr 12, 2026
commit bedbf0451afab31573f58fc2a2450e2804d81a9d
2 changes: 1 addition & 1 deletion Doc/howto/freethreading-stable-abi.rst
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=======================

Accessing any member of ``PyObject`` directly is now prohibited, like the non-GIL
stable ABI. For instance, prefer ``Py_Type()`` and ``Py_SET_TYPE()`` over ``ob_type``,
stable ABI. For instance, prefer ``Py_TYPE()`` and ``Py_SET_TYPE()`` over ``ob_type``,
``Py_REFCNT``, ``Py_INCREF()`` and ``Py_DecRef()`` over ``ob_refcnt``, etc.
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Module Initialization
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.. _PyDict_Next:

``PyDict_Next``
'''''''''''''''

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duplicate label pydict_next, other instance in /home/runner/work/cpython/cpython/Doc/howto/free-threading-extensions.rst

A notable exception is :c:func:`PyDict_Next`, which does not lock the
dictionary. You should use :c:macro:`Py_BEGIN_CRITICAL_SECTION` to protect
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.. _free-threaded-memory-allocation:

Memory Allocation APIs
======================

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duplicate label free-threaded-memory-allocation, other instance in /home/runner/work/cpython/cpython/Doc/howto/free-threading-extensions.rst

Python's memory management C API provides functions in three different
:ref:`allocation domains <allocator-domains>`: "raw", "mem", and "object".
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.. _per-object-locks:

Per-Object Locks (``ob_mutex``)
...............................

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duplicate label per-object-locks, other instance in /home/runner/work/cpython/cpython/Doc/howto/free-threading-extensions.rst

In the free-threaded build, each Python object contains a :c:member:`~PyObject.ob_mutex`
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field of type :c:type:`PyMutex`. This mutex is **reserved for use by the
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