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[v16,17/24] qmp: Add qmp_output_visitor_reset()

Message ID 1461879932-9020-18-git-send-email-eblake@redhat.com
State New
Headers show

Commit Message

Eric Blake April 28, 2016, 9:45 p.m. UTC 
Add a new qmp_output_visitor_reset(), to make it easier for a
caller to reset all state while still reusing an existing
visitor, regardless of whether the previous visit was
successfully completed.  Then use it in the testsuite.

The tests needing patching were found by tightening asserts
in the QMP output visitor; see the next patch.  An audit of
all other users of qmp_output_visitor_new() did not find any
other attempts to reuse a visitor.

Signed-off-by: Eric Blake <eblake@redhat.com>

---
v15: new patch, split off of v14 13/19
---
 include/qapi/qmp-output-visitor.h | 1 +
 qapi/qmp-output-visitor.c         | 8 +++++++-
 tests/test-qmp-output-visitor.c   | 6 ++++++
 3 files changed, 14 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/include/qapi/qmp-output-visitor.h b/include/qapi/qmp-output-visitor.h
index 2266770..5093f0d 100644
--- a/include/qapi/qmp-output-visitor.h
+++ b/include/qapi/qmp-output-visitor.h
@@ -21,6 +21,7 @@  typedef struct QmpOutputVisitor QmpOutputVisitor;

 QmpOutputVisitor *qmp_output_visitor_new(void);
 void qmp_output_visitor_cleanup(QmpOutputVisitor *v);
+void qmp_output_visitor_reset(QmpOutputVisitor *v);

 QObject *qmp_output_get_qobject(QmpOutputVisitor *v);
 Visitor *qmp_output_get_visitor(QmpOutputVisitor *v);
diff --git a/qapi/qmp-output-visitor.c b/qapi/qmp-output-visitor.c
index 5681ad3..6c44210 100644
--- a/qapi/qmp-output-visitor.c
+++ b/qapi/qmp-output-visitor.c
@@ -221,7 +221,7 @@  Visitor *qmp_output_get_visitor(QmpOutputVisitor *v)
     return &v->visitor;
 }

-void qmp_output_visitor_cleanup(QmpOutputVisitor *v)
+void qmp_output_visitor_reset(QmpOutputVisitor *v)
 {
     QStackEntry *e, *tmp;

@@ -231,6 +231,12 @@  void qmp_output_visitor_cleanup(QmpOutputVisitor *v)
     }

     qobject_decref(v->root);
+    v->root = NULL;
+}
+
+void qmp_output_visitor_cleanup(QmpOutputVisitor *v)
+{
+    qmp_output_visitor_reset(v);
     g_free(v);
 }

diff --git a/tests/test-qmp-output-visitor.c b/tests/test-qmp-output-visitor.c
index 8acc229..0e83099 100644
--- a/tests/test-qmp-output-visitor.c
+++ b/tests/test-qmp-output-visitor.c
@@ -139,6 +139,7 @@  static void test_visitor_out_enum(TestOutputVisitorData *data,
         g_assert_cmpstr(qstring_get_str(qobject_to_qstring(obj)), ==,
                         EnumOne_lookup[i]);
         qobject_decref(obj);
+        qmp_output_visitor_reset(data->qov);
     }
 }

@@ -153,6 +154,7 @@  static void test_visitor_out_enum_errors(TestOutputVisitorData *data,
         visit_type_EnumOne(data->ov, "unused", &bad_values[i], &err);
         g_assert(err);
         error_free(err);
+        qmp_output_visitor_reset(data->qov);
     }
 }

@@ -262,6 +264,7 @@  static void test_visitor_out_struct_errors(TestOutputVisitorData *data,
         visit_type_UserDefOne(data->ov, "unused", &pu, &err);
         g_assert(err);
         error_free(err);
+        qmp_output_visitor_reset(data->qov);
     }
 }

@@ -366,6 +369,7 @@  static void test_visitor_out_any(TestOutputVisitorData *data,
     qobject_decref(obj);
     qobject_decref(qobj);

+    qmp_output_visitor_reset(data->qov);
     qdict = qdict_new();
     qdict_put(qdict, "integer", qint_from_int(-42));
     qdict_put(qdict, "boolean", qbool_from_bool(true));
@@ -442,6 +446,7 @@  static void test_visitor_out_alternate(TestOutputVisitorData *data,
     qapi_free_UserDefAlternate(tmp);
     qobject_decref(arg);

+    qmp_output_visitor_reset(data->qov);
     tmp = g_new0(UserDefAlternate, 1);
     tmp->type = QTYPE_QSTRING;
     tmp->u.s = g_strdup("hello");
@@ -455,6 +460,7 @@  static void test_visitor_out_alternate(TestOutputVisitorData *data,
     qapi_free_UserDefAlternate(tmp);
     qobject_decref(arg);

+    qmp_output_visitor_reset(data->qov);
     tmp = g_new0(UserDefAlternate, 1);
     tmp->type = QTYPE_QDICT;
     tmp->u.udfu.integer = 1;