mirror of https://gitee.com/openkylin/qemu.git
qapi: modify visitor code generation for list iteration
Modify logic such that we never assign values to the list head argument to progress through the list on subsequent iterations, instead rely only on having our return value passed back in as an argument on the next call. Also update QMP I/O visitors and test cases accordingly, and add a missing test case for QmpOutputVisitor. Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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@ -144,8 +144,6 @@ static GenericList *qmp_input_next_list(Visitor *v, GenericList **list,
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}
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(*list)->next = entry;
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}
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*list = entry;
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return entry;
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}
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@ -240,9 +238,11 @@ static void qmp_input_type_enum(Visitor *v, int *obj, const char *strings[],
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if (strings[value] == NULL) {
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error_set(errp, QERR_INVALID_PARAMETER, name ? name : "null");
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g_free(enum_str);
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return;
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}
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g_free(enum_str);
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*obj = value;
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}
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@ -20,6 +20,7 @@
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typedef struct QStackEntry
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{
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QObject *value;
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bool is_list_head;
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QTAILQ_ENTRY(QStackEntry) node;
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} QStackEntry;
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@ -45,6 +46,9 @@ static void qmp_output_push_obj(QmpOutputVisitor *qov, QObject *value)
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QStackEntry *e = g_malloc0(sizeof(*e));
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e->value = value;
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if (qobject_type(e->value) == QTYPE_QLIST) {
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e->is_list_head = true;
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}
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QTAILQ_INSERT_HEAD(&qov->stack, e, node);
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}
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@ -122,12 +126,20 @@ static void qmp_output_start_list(Visitor *v, const char *name, Error **errp)
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qmp_output_push(qov, list);
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}
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static GenericList *qmp_output_next_list(Visitor *v, GenericList **list,
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static GenericList *qmp_output_next_list(Visitor *v, GenericList **listp,
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Error **errp)
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{
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GenericList *retval = *list;
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*list = retval->next;
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return retval;
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GenericList *list = *listp;
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QmpOutputVisitor *qov = to_qov(v);
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QStackEntry *e = QTAILQ_FIRST(&qov->stack);
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assert(e);
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if (e->is_list_head) {
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e->is_list_head = false;
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return list;
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}
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return list ? list->next : NULL;
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}
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static void qmp_output_end_list(Visitor *v, Error **errp)
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@ -79,11 +79,11 @@ def generate_visit_list(name, members):
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void visit_type_%(name)sList(Visitor *m, %(name)sList ** obj, const char *name, Error **errp)
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{
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GenericList *i;
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GenericList *i, **head = (GenericList **)obj;
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visit_start_list(m, name, errp);
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for (i = visit_next_list(m, (GenericList **)obj, errp); i; i = visit_next_list(m, &i, errp)) {
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for (*head = i = visit_next_list(m, head, errp); i; i = visit_next_list(m, &i, errp)) {
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%(name)sList *native_i = (%(name)sList *)i;
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visit_type_%(name)s(m, &native_i->value, NULL, errp);
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}
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@ -27,11 +27,11 @@ static void visit_type_TestStruct(Visitor *v, TestStruct **obj, const char *name
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static void visit_type_TestStructList(Visitor *m, TestStructList ** obj, const char *name, Error **errp)
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{
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GenericList *i;
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GenericList *i, **head = (GenericList **)obj;
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visit_start_list(m, name, errp);
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for (i = visit_next_list(m, (GenericList **)obj, errp); i; i = visit_next_list(m, &i, errp)) {
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for (*head = i = visit_next_list(m, head, errp); i; i = visit_next_list(m, &i, errp)) {
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TestStructList *native_i = (TestStructList *)i;
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visit_type_TestStruct(m, &native_i->value, NULL, errp);
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}
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@ -50,6 +50,8 @@ static void test_visitor_core(void)
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TestStructList *lts = NULL;
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Error *err = NULL;
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QObject *obj;
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QList *qlist;
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QDict *qdict;
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QString *str;
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int64_t value = 0;
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@ -96,7 +98,9 @@ static void test_visitor_core(void)
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g_assert(pts->y == 84);
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qobject_decref(obj);
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g_free(pts);
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/* test list input visitor */
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obj = qobject_from_json("[{'x': 42, 'y': 84}, {'x': 12, 'y': 24}]");
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mi = qmp_input_visitor_new(obj);
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v = qmp_input_get_visitor(mi);
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@ -110,14 +114,41 @@ static void test_visitor_core(void)
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g_assert(lts->value->x == 42);
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g_assert(lts->value->y == 84);
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lts = lts->next;
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g_assert(lts != NULL);
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g_assert(lts->value->x == 12);
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g_assert(lts->value->y == 24);
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g_assert(lts->next == NULL);
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g_assert(lts->next != NULL);
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g_assert(lts->next->value->x == 12);
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g_assert(lts->next->value->y == 24);
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g_assert(lts->next->next == NULL);
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qobject_decref(obj);
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/* test list output visitor */
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mo = qmp_output_visitor_new();
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v = qmp_output_get_visitor(mo);
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visit_type_TestStructList(v, <s, NULL, &err);
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if (err) {
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g_error("%s", error_get_pretty(err));
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}
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obj = qmp_output_get_qobject(mo);
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g_print("obj: %s\n", qstring_get_str(qobject_to_json(obj)));
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qlist = qobject_to_qlist(obj);
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assert(qlist);
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obj = qlist_pop(qlist);
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qdict = qobject_to_qdict(obj);
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assert(qdict);
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assert(qdict_get_int(qdict, "x") == 42);
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assert(qdict_get_int(qdict, "y") == 84);
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qobject_decref(obj);
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obj = qlist_pop(qlist);
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qdict = qobject_to_qdict(obj);
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assert(qdict);
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assert(qdict_get_int(qdict, "x") == 12);
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assert(qdict_get_int(qdict, "y") == 24);
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qobject_decref(obj);
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qmp_output_visitor_cleanup(mo);
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QDECREF(qlist);
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}
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/* test deep nesting with refs to other user-defined types */
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@ -286,7 +317,8 @@ static void test_nested_enums(void)
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g_assert(nested_enums_cpy->has_enum2 == false);
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g_assert(nested_enums_cpy->has_enum4 == true);
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qobject_decref(obj);
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qmp_output_visitor_cleanup(mo);
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qmp_input_visitor_cleanup(mi);
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qapi_free_NestedEnumsOne(nested_enums);
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qapi_free_NestedEnumsOne(nested_enums_cpy);
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}
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