bpo-38644: Add Py_EnterRecursiveCall() to the limited API (GH-17046)

Provide Py_EnterRecursiveCall() and Py_LeaveRecursiveCall() as
regular functions for the limited API. Previously, there were defined
as macros, but these macros didn't work with the limited API which
cannot access PyThreadState.recursion_depth field.

Remove _Py_CheckRecursionLimit from the stable ABI.

Add Include/cpython/ceval.h header file.

1 files changed, 18 insertions, 0 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index a7d2ea8006..881a7dd629 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -5632,3 +5632,21 @@ maybe_dtrace_line(PyFrameObject *frame,
     }
     *instr_prev = frame->f_lasti;
 }
+
+
+/* Implement Py_EnterRecursiveCall() and Py_LeaveRecursiveCall() as functions
+   for the limited API. */
+
+#undef Py_EnterRecursiveCall
+
+int Py_EnterRecursiveCall(const char *where)
+{
+    return _Py_EnterRecursiveCall_macro(where);
+}
+
+#undef Py_LeaveRecursiveCall
+
+void Py_LeaveRecursiveCall(void)
+{
+    _Py_LeaveRecursiveCall_macro();
+}