ext: use new C API for unique references

ngoldbaum · indygreg · commit fc727e5fe5c7 · 2025-09-13T16:52:28.000-07:00
Closes #278.
diff --git a/c-ext/backend_c.c b/c-ext/backend_c.c
@@ -317,7 +317,7 @@ size_t roundpow2(size_t i) {
 int safe_pybytes_resize(PyObject **obj, Py_ssize_t size) {
     PyObject *tmp;
 
-    if (Py_REFCNT(*obj) == 1) {
+    if (PyUnstable_Object_IsUniquelyReferenced(*obj)) {
         return _PyBytes_Resize(obj, size);
     }
 

Original file line number	Diff line number	Diff line change
`@@ -317,7 +317,7 @@ size_t roundpow2(size_t i) {`
`317`	`317`	`int safe_pybytes_resize(PyObject **obj, Py_ssize_t size) {`
`318`	`318`	`PyObject *tmp;`
`319`	`319`
`320`		`- if (Py_REFCNT(*obj) == 1) {`
	`320`	`+ if (PyUnstable_Object_IsUniquelyReferenced(*obj)) {`
`321`	`321`	`return _PyBytes_Resize(obj, size);`
`322`	`322`	`}`
`323`	`323`