python
diff --git a/‎Include/object.h
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+11-2Lines changed: 11 additions & 2 deletions b/‎Include/object.h
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+11-2Lines changed: 11 additions & 2 deletions
diff --git a/‎Lib/test/test_stable_abi_ctypes.py
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diff --git a/‎Misc/NEWS.d/next/C API/2023-10-30-18-13-01.gh-issue-111506.EUdO22.rst
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diff --git a/‎Misc/stable_abi.toml
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diff --git a/‎Objects/object.c
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diff --git a/‎PC/python3dll.c
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@@ -327,15 +327,23 @@ static inline int Py_IS_TYPE(PyObject *ob, PyTypeObject *type) {
 #endif
 
 
+// Py_SET_REFCNT() implementation for stable ABI
+PyAPI_FUNC(void) _Py_SetRefcnt(PyObject *ob, Py_ssize_t refcnt);
+
 static inline void Py_SET_REFCNT(PyObject *ob, Py_ssize_t refcnt) {
+#if defined(Py_LIMITED_API) && Py_LIMITED_API+0 >= 0x030d0000
+    // Stable ABI implements Py_SET_REFCNT() as a function call
+    // on limited C API version 3.13 and newer.
+    _Py_SetRefcnt(ob, refcnt);
+#else
     // This immortal check is for code that is unaware of immortal objects.
     // The runtime tracks these objects and we should avoid as much
     // as possible having extensions inadvertently change the refcnt
     // of an immortalized object.
     if (_Py_IsImmortal(ob)) {
         return;
     }
-#if !defined(Py_NOGIL)
+#ifndef Py_NOGIL
     ob->ob_refcnt = refcnt;
 #else
     if (_Py_IsOwnedByCurrentThread(ob)) {
@@ -352,7 +360,8 @@ static inline void Py_SET_REFCNT(PyObject *ob, Py_ssize_t refcnt) {
         ob->ob_ref_local = 0;
         ob->ob_ref_shared = _Py_REF_SHARED(refcnt, _Py_REF_MERGED);
     }
-#endif
+#endif  // Py_NOGIL
+#endif  // Py_LIMITED_API+0 < 0x030d0000
 }
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 < 0x030b0000
 #  define Py_SET_REFCNT(ob, refcnt) Py_SET_REFCNT(_PyObject_CAST(ob), (refcnt))
 
@@ -0,0 +1,2 @@
+In the limited C API version 3.13, :c:func:`Py_SET_REFCNT` function is now
+implemented as an opaque function call. Patch by Victor Stinner.
@@ -2480,3 +2480,6 @@
     added = '3.13'
 [function.PyUnicode_AsUTF8]
     added = '3.13'
+[function._Py_SetRefcnt]
+    added = '3.13'
+    abi_only = true
@@ -2931,3 +2931,11 @@ int Py_IsFalse(PyObject *x)
 {
     return Py_Is(x, Py_False);
 }
+
+
+// Py_SET_REFCNT() implementation for stable ABI
+void
+_Py_SetRefcnt(PyObject *ob, Py_ssize_t refcnt)
+{
+    Py_SET_REFCNT(ob, refcnt);
+}
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+In the limited C API version 3.13, :c:func:`Py_SET_REFCNT` function is now
	`2`	`+implemented as an opaque function call. Patch by Victor Stinner.`
Original file line number	Diff line number	Diff line change
`@@ -2931,3 +2931,11 @@ int Py_IsFalse(PyObject *x)`
`2931`	`2931`	`{`
`2932`	`2932`	`return Py_Is(x, Py_False);`
`2933`	`2933`	`}`
	`2934`	`+`
	`2935`	`+`
	`2936`	`+// Py_SET_REFCNT() implementation for stable ABI`
	`2937`	`+void`
	`2938`	`+_Py_SetRefcnt(PyObject *ob, Py_ssize_t refcnt)`
	`2939`	`+{`
	`2940`	`+ Py_SET_REFCNT(ob, refcnt);`
	`2941`	`+}`