[PATCH 2/2] gdb/python: Make a function return gdbpy_ref<>

[Andrew Burgess <andrew.burgess@embecosm.com>]

Make convert_values_to_python return a gdbpy_ref<> directly rather
than building a gdbpy_ref<>, releasing it, and then having a new
gdbpy_ref<> created to hold the result.

I also added a header comment to convert_values_to_python.

gdb/ChangeLog:

	* python/py-function.c (convert_values_to_python): Return
	gdbpy_ref<>. Add header comment.
	(fnpy_call): Adjust.
---
 gdb/ChangeLog            | 6 ++++++
 gdb/python/py-function.c | 9 ++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/gdb/python/py-function.c b/gdb/python/py-function.c
index 1900f0ff0c0..cf5e68a0545 100644
--- a/gdb/python/py-function.c
+++ b/gdb/python/py-function.c
@@ -34,7 +34,10 @@ extern PyTypeObject fnpy_object_type
 
 \f
 
-static PyObject *
+/* Return a reference to a tuple ARGC elements long.  Each element of the
+   tuple is a PyObject converted from the corresponding element of ARGV.  */
+
+static gdbpy_ref<>
 convert_values_to_python (int argc, struct value **argv)
 {
   int i;
@@ -50,7 +53,7 @@ convert_values_to_python (int argc, struct value **argv)
 	return NULL;
       PyTuple_SetItem (result.get (), i, elt.release ());
     }
-  return result.release ();
+  return result;
 }
 
 /* Call a Python function object's invoke method.  */
@@ -64,7 +67,7 @@ fnpy_call (struct gdbarch *gdbarch, const struct language_defn *language,
   gdbpy_enter enter_py (gdbarch, language);
   struct value *value;
   gdbpy_ref<> result;
-  gdbpy_ref<> args (convert_values_to_python (argc, argv));
+  gdbpy_ref<> args = convert_values_to_python (argc, argv);
 
   /* convert_values_to_python can return NULL on error.  If we
      encounter this, do not call the function, but allow the Python ->
-- 
2.14.5