gdb/python: accept gdbpy_ref in init helpers and return bool

Passing 'gdbpy_ref<> &' instead of raw 'PyObject *' to init helpers
makes ownership of PyObject clearer at call sites, and removes
unnecessary '.get()' calls.
Changing the return type from 'int' to 'bool' improves readability
and better expresses the success/failure semantics.

Approved-By: Tom Tromey <tom@tromey.com>

2 files changed, 23 insertions, 26 deletions

diff --git a/gdb/python/py-objfile.c b/gdb/python/py-objfile.c
index 5d7cfe83ec2..bbe21d32549 100644
--- a/gdb/python/py-objfile.c
+++ b/gdb/python/py-objfile.c
@@ -198,36 +198,36 @@ objfpy_dealloc (PyObject *o)
 /* Initialize an objfile_object.
    The result is a boolean indicating success.  */
 
-static int
-objfpy_initialize (objfile_object *self)
+static bool
+objfpy_initialize (gdbpy_ref<objfile_object> &self)
 {
   self->objfile = NULL;
 
   self->dict = PyDict_New ();
   if (self->dict == NULL)
-    return 0;
+    return false;
 
   self->printers = PyList_New (0);
   if (self->printers == NULL)
-    return 0;
+    return false;
 
   self->frame_filters = PyDict_New ();
   if (self->frame_filters == NULL)
-    return 0;
+    return false;
 
   self->frame_unwinders = PyList_New (0);
   if (self->frame_unwinders == NULL)
-    return 0;
+    return false;
 
   self->type_printers = PyList_New (0);
   if (self->type_printers == NULL)
-    return 0;
+    return false;
 
   self->xmethods = PyList_New (0);
   if (self->xmethods == NULL)
-    return 0;
+    return false;
 
-  return 1;
+  return true;
 }
 
 static PyObject *
@@ -235,11 +235,8 @@ objfpy_new (PyTypeObject *type, PyObject *args, PyObject *keywords)
 {
   gdbpy_ref<objfile_object> self ((objfile_object *) type->tp_alloc (type, 0));
 
-  if (self != NULL)
-    {
-      if (!objfpy_initialize (self.get ()))
-	return NULL;
-    }
+  if (self != nullptr && !objfpy_initialize (self))
+    return nullptr;
 
   return (PyObject *) self.release ();
 }
@@ -682,7 +679,7 @@ objfile_to_objfile_object (struct objfile *objfile)
 	((objfile_object *) PyObject_New (objfile_object, &objfile_object_type));
       if (object == NULL)
 	return NULL;
-      if (!objfpy_initialize (object.get ()))
+      if (!objfpy_initialize (object))
 	return NULL;
 
       object->objfile = objfile;
diff --git a/gdb/python/py-progspace.c b/gdb/python/py-progspace.c
index baab3be5ee6..5a23c4c7177 100644
--- a/gdb/python/py-progspace.c
+++ b/gdb/python/py-progspace.c
@@ -166,40 +166,40 @@ pspy_dealloc (PyObject *self)
 /* Initialize a pspace_object.
    The result is a boolean indicating success.  */
 
-static int
-pspy_initialize (pspace_object *self)
+static bool
+pspy_initialize (gdbpy_ref<pspace_object> &self)
 {
   self->pspace = NULL;
 
   self->dict = PyDict_New ();
   if (self->dict == NULL)
-    return 0;
+    return false;
 
   self->printers = PyList_New (0);
   if (self->printers == NULL)
-    return 0;
+    return false;
 
   self->frame_filters = PyDict_New ();
   if (self->frame_filters == NULL)
-    return 0;
+    return false;
 
   self->frame_unwinders = PyList_New (0);
   if (self->frame_unwinders == NULL)
-    return 0;
+    return false;
 
   self->type_printers = PyList_New (0);
   if (self->type_printers == NULL)
-    return 0;
+    return false;
 
   self->xmethods = PyList_New (0);
   if (self->xmethods == NULL)
-    return 0;
+    return false;
 
   self->missing_file_handlers = PyList_New (0);
   if (self->missing_file_handlers == nullptr)
-    return 0;
+    return false;
 
-  return 1;
+  return true;
 }
 
 PyObject *
@@ -591,7 +591,7 @@ pspace_to_pspace_object (struct program_space *pspace)
 	((pspace_object *) PyObject_New (pspace_object, &pspace_object_type));
       if (object == NULL)
 	return NULL;
-      if (!pspy_initialize (object.get ()))
+      if (!pspy_initialize (object))
 	return NULL;
 
       object->pspace = pspace;