C++ CyObject utility code

Cython/Utility/ModuleSetupCode.c

@@ -1532,20 +1532,37 @@ static void __Pyx_FastGilFuncInit(void) {
 #endif /* Has GCC */
 
 #ifdef __cplusplus
+  #if __cplusplus >= 201103L
     #include <atomic>
     using namespace std;
     #define CyObject_ATOMIC_REFCOUNT_TYPE atomic_int
-#else
-  #include <stdatomic.h>
-  #define CyObject_ATOMIC_REFCOUNT_TYPE int
-#endif /* __cplusplus */
 
-/* CyObject_HEAD defines the initial segment of every CyObject. */
-#define CyObject_HEAD                  \
-    CyObject_ATOMIC_REFCOUNT_TYPE ob_refcnt;                  \
-    void (*cdealloc)(void* self);
+    class CyObject {
+        private: CyObject_ATOMIC_REFCOUNT_TYPE ob_refcnt;
+        public:
+          CyObject(): ob_refcnt(1) {}
+          virtual ~CyObject() {}
+          void CyObject_INCREF();
+          int CyObject_DECREF();
+    };
+
+    static inline int _Cy_DECREF(CyObject *op) {
+        return op->CyObject_DECREF();
+    }
 
-struct CyObject {
-  CyObject_HEAD
-};
+    static inline void _Cy_INCREF(CyObject *op) {
+        op->CyObject_INCREF();
+    }
+
+    /* Cast argument to CyObject* type. */
+    #define _CyObject_CAST(op) op
 
+    #define Cy_INCREF(op) _Cy_INCREF(_CyObject_CAST(op))
+    #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_GOTREF(op)
+    #define Cy_XGOTREF(op)
+    #define Cy_GIVEREF(op)
+    #define Cy_XGIVEREF(op)
+  #endif
+#endif

Cython/Utility/ObjectHandling.c

@@ -1589,44 +1589,23 @@ try_unpack:
 // atomic is already included in ModuleSetupCode
 //  #include <atomic>
 #else
-  #include <stdlib.h>
-  #include <stddef.h>
-//  #include <stdatomic.h>
+  #error C++ needed for cython+ nogil classes
 #endif /* __cplusplus */
 
-// Defined in ModuleSetupCode.c
-/* CyObject_HEAD defines the initial segment of every CyObject. */
-//#define CyObject_HEAD                   \
-//    int ob_refcnt;               \
-//    void (*cdealloc)(void * self);
-
-/* Cast argument to PyObject* type. */
-#define _CyObject_CAST(op) ((struct CyObject*)(op))
-
-static inline void _Cy_DECREF(struct CyObject *op) {
-//  int f = open("log_nogil", O_WRONLY|O_APPEND);
-//  dprintf(f, "DECREF ob_refcnt (before decref) = %d\n", op->ob_refcnt);
-  if (atomic_fetch_sub(&(op->ob_refcnt), 1) == 1) {
-    //op->cdealloc(op);
-    // DEBUG
-//    dprintf(f, "Freeing memory\n");
-    free(op);
-  }
-//  close(f);
+void CyObject::CyObject_INCREF()
+{
+  atomic_fetch_add(&(this->ob_refcnt), 1);
 }
 
-static inline void _Cy_INCREF(struct CyObject *op) {
-  atomic_fetch_add(&(op->ob_refcnt), 1);
+int CyObject::CyObject_DECREF()
+{
+  if (atomic_fetch_sub(&(this->ob_refcnt), 1) == 1) {
+    delete this;
+    return 1;
+  }
+  return 0;
 }
 
-#define Cy_INCREF(op) _Cy_INCREF(_CyObject_CAST(op))
-#define Cy_DECREF(op) _Cy_DECREF(_CyObject_CAST(op))
-#define Cy_XDECREF(op) do {if (op != NULL) {Cy_DECREF(op);}} while(0)
-#define Cy_GOTREF(op)
-#define Cy_XGOTREF(op)
-#define Cy_GIVEREF(op)
-#define Cy_XGIVEREF(op)
-
 /////////////// UnpackUnboundCMethod.proto ///////////////
 
 typedef struct {