Add a builtin macro to get current cypclass nogil refcount

Cython/Compiler/Builtin.py

@@ -652,15 +652,17 @@ def init_builtin_structs():
             name, "struct", scope, 1, None, cname = cname)
 
 def inject_cypclass_refcount_macros():
-    reference_to_cy_object_type = PyrexTypes.CReferenceType(PyrexTypes.cy_object_type)
-    incref_macro_type = PyrexTypes.CFuncType(PyrexTypes.c_void_type, [PyrexTypes.CFuncTypeArg("obj", PyrexTypes.cy_object_type, None)], nogil = 1)
+    incref_type = PyrexTypes.CFuncType(PyrexTypes.c_void_type, [PyrexTypes.CFuncTypeArg("obj", PyrexTypes.cy_object_type, None)], nogil = 1)
 
     # The decref macros set their argument to NULL when the counter reaches 0,
     # so we pretend to Cython that it's a c++ function with the argument passed by reference.
     # This keeps the compiler from using std::move when calling the macro for instance.
-    decref_macro_type = PyrexTypes.CFuncType(PyrexTypes.c_void_type, [PyrexTypes.CFuncTypeArg("obj", reference_to_cy_object_type, None)], nogil = 1)
+    reference_to_cy_object_type = PyrexTypes.CReferenceType(PyrexTypes.cy_object_type)
+    decref_type = PyrexTypes.CFuncType(PyrexTypes.c_void_type, [PyrexTypes.CFuncTypeArg("obj", reference_to_cy_object_type, None)], nogil = 1)
+
+    getref_type = PyrexTypes.CFuncType(PyrexTypes.c_int_type, [PyrexTypes.CFuncTypeArg("obj", PyrexTypes.cy_object_type, None)], nogil = 1)
 
-    for macro, macro_type in [("Cy_INCREF", incref_macro_type), ("Cy_DECREF", decref_macro_type), ("Cy_XDECREF", decref_macro_type)]:
+    for macro, macro_type in [("Cy_INCREF", incref_type), ("Cy_DECREF", decref_type), ("Cy_XDECREF", decref_type), ("Cy_GETREF", getref_type)]:
         builtin_scope.declare_builtin_cfunction(macro, macro_type, macro)
 
 def inject_cypclass_lock_macros():

Cython/Utility/CyObjects.cpp

@@ -67,6 +67,7 @@
           virtual ~CyObject();
           void CyObject_INCREF();
           int CyObject_DECREF();
+          int CyObject_GETREF();
           void CyObject_RLOCK();
           void CyObject_WLOCK();
           void CyObject_UNLOCK();
@@ -125,6 +126,10 @@
         op->CyObject_INCREF();
     }
 
+    static inline int _Cy_GETREF(CyObject *op) {
+        return op->CyObject_GETREF();
+    }
+
     static inline void _Cy_RLOCK(CyObject *op) {
         if (op != NULL) {
             op->CyObject_RLOCK();
@@ -227,6 +232,7 @@
     #define Cy_INCREF(op) do {if (op != NULL) {_Cy_INCREF(_CyObject_CAST(op));}} while(0)
     #define Cy_DECREF(op) do {if (_Cy_DECREF(_CyObject_CAST(op))) {op = NULL;}} while(0)
     #define Cy_XDECREF(op) do {if (op != NULL) {Cy_DECREF(op);}} while(0)
+    #define Cy_GETREF(op) (_Cy_GETREF(_CyObject_CAST(op)))
     #define Cy_GOTREF(op)
     #define Cy_XGOTREF(op)
     #define Cy_GIVEREF(op)
@@ -469,6 +475,11 @@ int CyObject::CyObject_DECREF()
   return 0;
 }
 
+int CyObject::CyObject_GETREF()
+{
+  return this->nogil_ob_refcnt;
+}
+
 void CyObject::CyObject_RLOCK()
 {
   this->ob_lock.rlock();