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[3.14] Docs: Fix and improve the PyUnstable_Object_EnableDeferredRefcount documentation (GH-135323) (GH-136610)

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Docs: Fix and improve the `PyUnstable_Object_EnableDeferredRefcount` documentation (GH-135323)
(cherry picked from commit 0d4fd10fba)

Co-authored-by: Peter Bierma <zintensitydev@gmail.com>
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Miss Islington (bot) 2025-07-13 08:52:58 +02:00 • committed by GitHub
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Doc/c-api/object.rst
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@ -596,12 +596,13 @@ Object Protocol
if supported by the runtime. In the :term:`free-threaded <free threading>` build, if supported by the runtime. In the :term:`free-threaded <free threading>` build,
this allows the interpreter to avoid reference count adjustments to *obj*, this allows the interpreter to avoid reference count adjustments to *obj*,
which may improve multi-threaded performance. The tradeoff is which may improve multi-threaded performance. The tradeoff is
that *obj* will only be deallocated by the tracing garbage collector. that *obj* will only be deallocated by the tracing garbage collector, and
not when the interpreter no longer has any references to it.
This function returns ``1`` if deferred reference counting is enabled on *obj* This function returns ``1`` if deferred reference counting is enabled on *obj*,
(including when it was enabled before the call),
and ``0`` if deferred reference counting is not supported or if the hint was and ``0`` if deferred reference counting is not supported or if the hint was
ignored by the runtime. This function is thread-safe, and cannot fail. ignored by the interpreter, such as when deferred reference counting is already
enabled on *obj*. This function is thread-safe, and cannot fail.
This function does nothing on builds with the :term:`GIL` enabled, which do This function does nothing on builds with the :term:`GIL` enabled, which do
not support deferred reference counting. This also does nothing if *obj* is not not support deferred reference counting. This also does nothing if *obj* is not
@ -609,7 +610,8 @@ Object Protocol
:c:func:`PyObject_GC_IsTracked`). :c:func:`PyObject_GC_IsTracked`).
This function is intended to be used soon after *obj* is created, This function is intended to be used soon after *obj* is created,
by the code that creates it. by the code that creates it, such as in the object's :c:member:`~PyTypeObject.tp_new`
slot.
.. versionadded:: 3.14 .. versionadded:: 3.14