fix: support Python 3.13t

Signed-off-by: Henry Schreiner <[email protected]>
pybind · May 24, 2024 · c57a840 · c57a840
1 parent 15bc5f3
commit c57a840
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Showing 3 changed files with 5 additions and 3 deletions.
diff --git a/include/pybind11/pytypes.h b/include/pybind11/pytypes.h
@@ -183,7 +183,7 @@ class object_api : public pyobject_tag {
     str_attr_accessor doc() const;
 
     /// Return the object's current reference count
-    int ref_count() const { return static_cast<int>(Py_REFCNT(derived().ptr())); }
+    ssize_t ref_count() const { return Py_REFCNT(derived().ptr()); }
 
     // TODO PYBIND11_DEPRECATED(
     //     "Call py::type::handle_of(h) or py::type::of(h) instead of h.get_type()")

diff --git a/tests/test_class.py b/tests/test_class.py
@@ -377,7 +377,8 @@ class PyDog(m.Dog):
         refcount_3 = getrefcount(cls)
 
         assert refcount_1 == refcount_3
-        assert refcount_2 > refcount_1
+        # Free-threaded Python uses UINT32_MAX for immortal objects
+        assert (refcount_2 > refcount_1) or (refcount_2 == refcount_1 == 2**32 - 1)
 
 
 def test_reentrant_implicit_conversion_failure(msg):

diff --git a/tests/test_pytypes.py b/tests/test_pytypes.py
@@ -635,7 +635,8 @@ def test_memoryview_refcount(method):
     ref_before = sys.getrefcount(buf)
     view = method(buf)
     ref_after = sys.getrefcount(buf)
-    assert ref_before < ref_after
+    # Free threaded Python uses UINT32_MAX
+    assert ref_before < ref_after or ref_before == ref_after == 2**32 - 1
     assert list(view) == list(buf)