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qapi: Use QNull for a more regular visit_type_null() 

Make visit_type_null() take an @obj argument like its buddies.  This
helps keep the next commit simple.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
master
Markus Armbruster 2017-06-26 18:22:59 +02:00
parent 006ca09f30
commit d2f95f4d48
15 changed files with 60 additions and 25 deletions
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4
hw/ppc/spapr_drc.c
View File

@ -297,12 +297,14 @@ static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
sPAPRDRConnector *drc = SPAPR_DR_CONNECTOR(obj);
QNull *null = NULL;
Error *err = NULL;
int fdt_offset_next, fdt_offset, fdt_depth;
void *fdt;
if (!drc->fdt) {
visit_type_null(v, NULL, errp);
visit_type_null(v, NULL, &null, errp);
QDECREF(null);
return;
}

3
include/qapi/visitor-impl.h
View File

@ -103,7 +103,8 @@ struct Visitor
Error **errp);
/* Must be set to visit explicit null values. */
void (*type_null)(Visitor *v, const char *name, Error **errp);
void (*type_null)(Visitor *v, const char *name, QNull **obj,
Error **errp);
/* Must be set for input visitors to visit structs, optional otherwise.
The core takes care of the return type in the public interface. */

8
include/qapi/visitor.h
View File

@ -618,10 +618,10 @@ void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp);
* @name expresses the relationship of the null value to its parent
* container; see the general description of @name above.
*
* Unlike all other visit_type_* functions, no obj parameter is
* needed; rather, this is a witness that an explicit null value is
* expected rather than any other type.
* @obj must be non-NULL. Input visitors set *@obj to the value;
* other visitors ignore *@obj.
*/
void visit_type_null(Visitor *v, const char *name, Error **errp);
void visit_type_null(Visitor *v, const char *name, QNull **obj,
Error **errp);
#endif

5
qapi/qapi-clone-visitor.c
View File

@ -127,12 +127,13 @@ static void qapi_clone_type_number(Visitor *v, const char *name, double *obj,
/* Value was already cloned by g_memdup() */
}
static void qapi_clone_type_null(Visitor *v, const char *name, Error **errp)
static void qapi_clone_type_null(Visitor *v, const char *name, QNull **obj,
Error **errp)
{
QapiCloneVisitor *qcv = to_qcv(v);
assert(qcv->depth);
/* Nothing to do */
*obj = qnull();
}
static void qapi_clone_free(Visitor *v)

6
qapi/qapi-dealloc-visitor.c
View File

@ -103,8 +103,12 @@ static void qapi_dealloc_type_anything(Visitor *v, const char *name,
}
}
static void qapi_dealloc_type_null(Visitor *v, const char *name, Error **errp)
static void qapi_dealloc_type_null(Visitor *v, const char *name,
QNull **obj, Error **errp)
{
if (obj) {
QDECREF(*obj);
}
}
static void qapi_dealloc_free(Visitor *v)

7
qapi/qapi-visit-core.c
View File

@ -325,10 +325,11 @@ void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp)
error_propagate(errp, err);
}
void visit_type_null(Visitor *v, const char *name, Error **errp)
void visit_type_null(Visitor *v, const char *name, QNull **obj,
Error **errp)
{
trace_visit_type_null(v, name);
v->type_null(v, name, errp);
trace_visit_type_null(v, name, obj);
v->type_null(v, name, obj, errp);
}
static void output_type_enum(Visitor *v, const char *name, int *obj,

6
qapi/qobject-input-visitor.c
View File

@ -587,11 +587,13 @@ static void qobject_input_type_any(Visitor *v, const char *name, QObject **obj,
*obj = qobj;
}
static void qobject_input_type_null(Visitor *v, const char *name, Error **errp)
static void qobject_input_type_null(Visitor *v, const char *name,
QNull **obj, Error **errp)
{
QObjectInputVisitor *qiv = to_qiv(v);
QObject *qobj = qobject_input_get_object(qiv, name, true, errp);
*obj = NULL;
if (!qobj) {
return;
}
@ -599,7 +601,9 @@ static void qobject_input_type_null(Visitor *v, const char *name, Error **errp)
if (qobject_type(qobj) != QTYPE_QNULL) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE,
full_name(qiv, name), "null");
return;
}
*obj = qnull();
}
static void qobject_input_type_size_keyval(Visitor *v, const char *name,

3
qapi/qobject-output-visitor.c
View File

@ -187,7 +187,8 @@ static void qobject_output_type_any(Visitor *v, const char *name,
qobject_output_add_obj(qov, name, *obj);
}
static void qobject_output_type_null(Visitor *v, const char *name, Error **errp)
static void qobject_output_type_null(Visitor *v, const char *name,
QNull **obj, Error **errp)
{
QObjectOutputVisitor *qov = to_qov(v);
qobject_output_add(qov, name, qnull());

8
qapi/string-input-visitor.c
View File

@ -326,14 +326,20 @@ static void parse_type_number(Visitor *v, const char *name, double *obj,
*obj = val;
}
static void parse_type_null(Visitor *v, const char *name, Error **errp)
static void parse_type_null(Visitor *v, const char *name, QNull **obj,
Error **errp)
{
StringInputVisitor *siv = to_siv(v);
*obj = NULL;
if (!siv->string || siv->string[0]) {
error_setg(errp, QERR_INVALID_PARAMETER_TYPE, name ? name : "null",
"null");
return;
}
*obj = qnull();
}
static void string_input_free(Visitor *v)

3
qapi/string-output-visitor.c
View File

@ -256,7 +256,8 @@ static void print_type_number(Visitor *v, const char *name, double *obj,
string_output_set(sov, g_strdup_printf("%f", *obj));
}
static void print_type_null(Visitor *v, const char *name, Error **errp)
static void print_type_null(Visitor *v, const char *name, QNull **obj,
Error **errp)
{
StringOutputVisitor *sov = to_sov(v);
char *out;

2
qapi/trace-events
View File

@ -31,4 +31,4 @@ visit_type_bool(void *v, const char *name, bool *obj) "v=%p name=%s obj=%p"
visit_type_str(void *v, const char *name, char **obj) "v=%p name=%s obj=%p"
visit_type_number(void *v, const char *name, double *obj) "v=%p name=%s obj=%p"
visit_type_any(void *v, const char *name, void *obj) "v=%p name=%s obj=%p"
visit_type_null(void *v, const char *name) "v=%p name=%s"
visit_type_null(void *v, const char *name, void *obj) "v=%p name=%s obj=%p"

5
target/ppc/translate_init.c
View File

@ -8428,11 +8428,14 @@ POWERPC_FAMILY(POWER5P)(ObjectClass *oc, void *data)
static void getset_compat_deprecated(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
QNull *null = NULL;
if (!qtest_enabled()) {
error_report("CPU 'compat' property is deprecated and has no effect; "
"use max-cpu-compat machine property instead");
}
visit_type_null(v, name, NULL);
visit_type_null(v, name, &null, NULL);
QDECREF(null);
}
static const PropertyInfo ppc_compat_deprecated_propinfo = {

9
tests/check-qnull.c
View File

@ -38,6 +38,7 @@ static void qnull_visit_test(void)
{
QObject *obj;
Visitor *v;
QNull *null;
/*
* Most tests of interactions between QObject and visitors are in
@ -49,13 +50,17 @@ static void qnull_visit_test(void)
obj = QOBJECT(qnull());
v = qobject_input_visitor_new(obj);
qobject_decref(obj);
visit_type_null(v, NULL, &error_abort);
visit_type_null(v, NULL, &null, &error_abort);
g_assert(obj == QOBJECT(&qnull_));
QDECREF(null);
visit_free(v);
null = NULL;
v = qobject_output_visitor_new(&obj);
visit_type_null(v, NULL, &error_abort);
visit_type_null(v, NULL, &null, &error_abort);
visit_complete(v, &obj);
g_assert(obj == QOBJECT(&qnull_));
QDECREF(null);
qobject_decref(obj);
visit_free(v);

13
tests/test-qobject-input-visitor.c
View File

@ -510,6 +510,7 @@ static void test_visitor_in_null(TestInputVisitorData *data,
{
Visitor *v;
Error *err = NULL;
QNull *null;
char *tmp;
/*
@ -524,12 +525,15 @@ static void test_visitor_in_null(TestInputVisitorData *data,
v = visitor_input_test_init_full(data, false,
"{ 'a': null, 'b': '' }");
visit_start_struct(v, NULL, NULL, 0, &error_abort);
visit_type_null(v, "a", &error_abort);
visit_type_null(v, "b", &err);
visit_type_null(v, "a", &null, &error_abort);
g_assert(qobject_type(QOBJECT(null)) == QTYPE_QNULL);
QDECREF(null);
visit_type_null(v, "b", &null, &err);
error_free_or_abort(&err);
g_assert(!null);
visit_type_str(v, "c", &tmp, &err);
g_assert(!tmp);
error_free_or_abort(&err);
g_assert(!tmp);
visit_check_struct(v, &error_abort);
visit_end_struct(v, NULL);
}
@ -1087,6 +1091,7 @@ static void test_visitor_in_fail_struct_missing(TestInputVisitorData *data,
Error *err = NULL;
Visitor *v;
QObject *any;
QNull *null;
GenericAlternate *alt;
bool present;
int en;
@ -1120,7 +1125,7 @@ static void test_visitor_in_fail_struct_missing(TestInputVisitorData *data,
error_free_or_abort(&err);
visit_type_any(v, "any", &any, &err);
error_free_or_abort(&err);
visit_type_null(v, "null", &err);
visit_type_null(v, "null", &null, &err);
error_free_or_abort(&err);
visit_start_list(v, "sub", NULL, 0, &error_abort);
visit_start_struct(v, NULL, NULL, 0, &error_abort);

3
tests/test-qobject-output-visitor.c
View File

@ -445,11 +445,12 @@ static void test_visitor_out_alternate(TestOutputVisitorData *data,
static void test_visitor_out_null(TestOutputVisitorData *data,
const void *unused)
{
QNull *null = NULL;
QDict *qdict;
QObject *nil;
visit_start_struct(data->ov, NULL, NULL, 0, &error_abort);
visit_type_null(data->ov, "a", &error_abort);
visit_type_null(data->ov, "a", &null, &error_abort);
visit_check_struct(data->ov, &error_abort);
visit_end_struct(data->ov, NULL);
qdict = qobject_to_qdict(visitor_get(data));