qobject: Replace qobject_incref/QINCREF qobject_decref/QDECREF

Now that we can safely call QOBJECT() on QObject * as well as its
subtypes, we can have macros qobject_ref() / qobject_unref() that work
everywhere instead of having to use QINCREF() / QDECREF() for QObject
and qobject_incref() / qobject_decref() for its subtypes.

The replacement is mechanical, except I broke a long line, and added a
cast in monitor_qmp_cleanup_req_queue_locked().  Unlike
qobject_decref(), qobject_unref() doesn't accept void *.

Note that the new macros evaluate their argument exactly once, thus no
need to shout them.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180419150145.24795-4-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
[Rebased, semantic conflict resolved, commit message improved]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/drive_del-test.c b/tests/drive_del-test.c
index 313030a14c..852fefc8f3 100644
--- a/tests/drive_del-test.c
+++ b/tests/drive_del-test.c
@@ -41,7 +41,7 @@ static void device_del(void)
     response = qmp_receive();
     g_assert(response);
     g_assert(qdict_haskey(response, "return"));
-    QDECREF(response);
+    qobject_unref(response);
 }
 
 static void test_drive_without_dev(void)
@@ -78,7 +78,7 @@ static void test_after_failed_device_add(void)
     g_assert(response);
     error = qdict_get_qdict(response, "error");
     g_assert_cmpstr(qdict_get_try_str(error, "class"), ==, "GenericError");
-    QDECREF(response);
+    qobject_unref(response);
 
     /* Delete the drive */
     drive_del();