bpo-39542: Make PyObject_INIT() opaque in limited C API (GH-18363)
In the limited C API, PyObject_INIT() and PyObject_INIT_VAR() are now
defined as aliases to PyObject_Init() and PyObject_InitVar() to make
their implementation opaque. It avoids to leak implementation details
in the limited C API.
Exclude the following functions from the limited C API, move them
from object.h to cpython/object.h:
* _Py_NewReference()
* _Py_ForgetReference()
* _PyTraceMalloc_NewReference()
* _Py_GetRefTotal()
diff --git a/Include/cpython/objimpl.h b/Include/cpython/objimpl.h
index f121922..3f14814 100644
--- a/Include/cpython/objimpl.h
+++ b/Include/cpython/objimpl.h
@@ -6,6 +6,39 @@
extern "C" {
#endif
+/* Inline functions trading binary compatibility for speed:
+ PyObject_INIT() is the fast version of PyObject_Init(), and
+ PyObject_INIT_VAR() is the fast version of PyObject_InitVar().
+
+ These inline functions must not be called with op=NULL. */
+static inline PyObject*
+_PyObject_INIT(PyObject *op, PyTypeObject *typeobj)
+{
+ assert(op != NULL);
+ Py_TYPE(op) = typeobj;
+ if (PyType_GetFlags(typeobj) & Py_TPFLAGS_HEAPTYPE) {
+ Py_INCREF(typeobj);
+ }
+ _Py_NewReference(op);
+ return op;
+}
+
+#define PyObject_INIT(op, typeobj) \
+ _PyObject_INIT(_PyObject_CAST(op), (typeobj))
+
+static inline PyVarObject*
+_PyObject_INIT_VAR(PyVarObject *op, PyTypeObject *typeobj, Py_ssize_t size)
+{
+ assert(op != NULL);
+ Py_SIZE(op) = size;
+ PyObject_INIT((PyObject *)op, typeobj);
+ return op;
+}
+
+#define PyObject_INIT_VAR(op, typeobj, size) \
+ _PyObject_INIT_VAR(_PyVarObject_CAST(op), (typeobj), (size))
+
+
/* This function returns the number of allocated memory blocks, regardless of size */
PyAPI_FUNC(Py_ssize_t) _Py_GetAllocatedBlocks(void);