Use memoryviews instead of old style buffers

Author: matusvalo

Modules/_librabbitmq/connection.c

@@ -1392,16 +1392,14 @@ PyRabbitMQ_recv(PyRabbitMQ_Connection *self, PyObject *p,
                     buf = PyBytes_AsString(payload);
                     if (!buf)
                         goto finally;
-                    view = PyBuffer_FromObject(payload, 0,
-                                   (Py_ssize_t)body_target);
+                    view = PyMemoryView_FromObject(payload);
                 }
                 else {
                     if (p) {
                         payload = PySTRING_FROM_AMQBYTES(
                                     frame.payload.body_fragment);
                     } else {
-                        view = PyBuffer_FromMemory(bufp,
-                                    (Py_ssize_t)frame.payload.body_fragment.len);
+                        view = buffer_toMemoryView(bufp, (Py_ssize_t)frame.payload.body_fragment.len);
                     }
                     break;
                 }

Modules/_librabbitmq/connection.h

@@ -45,6 +45,21 @@
 # endif
 #endif
 
+
+_PYRMQ_INLINE PyObject*
+buffer_toMemoryView(char *buf, Py_ssize_t buf_len) {
+        PyObject *view;
+#if PY_MAJOR_VERSION == 2
+        PyObject *pybuffer;
+        pybuffer = PyBuffer_FromMemory(buf, buf_len);
+        view = PyMemoryView_FromObject(pybuffer);
+        Py_XDECREF(pybuffer);
+#else
+        view = PyMemoryView_FromMemory(buf, buf_len, PyBUF_READ);
+#endif
+        return view;
+}
+
 #define PyDICT_SETNONE_DECREF(dict, key)                            \
     do {                                                            \
         PyDict_SetItem(dict, key, Py_None);                         \