gh-105927: PyWeakref_GetRef() returns 1 on success (#106561)

PyWeakref_GetRef() now returns 1 on success, and return 0 if the
reference is dead.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>

3 files changed, 6 insertions, 4 deletions

diff --git a/Doc/c-api/weakref.rst b/Doc/c-api/weakref.rst
index 04781f7..038f54a 100644
--- a/Doc/c-api/weakref.rst
+++ b/Doc/c-api/weakref.rst
@@ -55,9 +55,11 @@ as much as it can.
 
    Get a :term:`strong reference` to the referenced object from a weak
    reference, *ref*, into *\*pobj*.
-   Return 0 on success. Raise an exception and return -1 on error.
 
-   If the referent is no longer live, set *\*pobj* to ``NULL`` and return 0.
+   * On success, set *\*pobj* to a new :term:`strong reference` to the
+     referenced object and return 1.
+   * If the reference is dead, set *\*pobj* to ``NULL`` and return 0.
+   * On error, raise an exception and return -1.
 
    .. versionadded:: 3.13
 
diff --git a/Modules/_testcapimodule.c b/Modules/_testcapimodule.c
index 2baf453..50eaff9 100644
--- a/Modules/_testcapimodule.c
+++ b/Modules/_testcapimodule.c
@@ -3376,7 +3376,7 @@ test_weakref_capi(PyObject *Py_UNUSED(module), PyObject *Py_UNUSED(args))
 
     // test PyWeakref_GetRef(), reference is alive
     PyObject *ref = Py_True;  // marker to check that value was set
-    assert(PyWeakref_GetRef(weakref, &ref) == 0);
+    assert(PyWeakref_GetRef(weakref, &ref) == 1);
     assert(ref == obj);
     assert(Py_REFCNT(obj) == (refcnt + 1));
     Py_DECREF(ref);
diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index bac3e79..e956372 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -913,7 +913,7 @@ PyWeakref_GetRef(PyObject *ref, PyObject **pobj)
         return -1;
     }
     *pobj = _PyWeakref_GET_REF(ref);
-    return 0;
+    return (*pobj != NULL);
 }