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authorKevin Wolf <kwolf@redhat.com>2013-07-08 16:14:21 +0200
committerKevin Wolf <kwolf@redhat.com>2013-07-26 21:10:11 +0200
commit69dd62dfd60631ba69201d8a197fde1ece4b4df3 (patch)
tree9963bd4874919f3a53e0cc2aab0550385fd3ff79 /qapi
parentea66c6d8819c8fc5f73a28554992be64e5399fed (diff)
downloadqemu-arm-69dd62dfd60631ba69201d8a197fde1ece4b4df3.tar.gz
qapi: Anonymous unions
The discriminator for anonymous unions is the data type. This allows to have a union type that allows both of these: { 'file': 'my_existing_block_device_id' } { 'file': { 'filename': '/tmp/mydisk.qcow2', 'read-only': true } } Unions like this are specified in the schema with an empty dict as discriminator. For this example you could take: { 'union': 'BlockRef', 'discriminator': {}, 'data': { 'definition': 'BlockOptions', 'reference': 'str' } } { 'type': 'ExampleObject', 'data: { 'file': 'BlockRef' } } Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'qapi')
-rw-r--r--qapi/qapi-visit-core.c9
-rw-r--r--qapi/qmp-input-visitor.c14
2 files changed, 23 insertions, 0 deletions
diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index 9b4d51bc0a..d6a4012f78 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -12,6 +12,7 @@
*/
#include "qemu-common.h"
+#include "qapi/qmp/qobject.h"
#include "qapi/qmp/qerror.h"
#include "qapi/visitor.h"
#include "qapi/visitor-impl.h"
@@ -98,6 +99,14 @@ void visit_end_optional(Visitor *v, Error **errp)
}
}
+void visit_get_next_type(Visitor *v, int *obj, const int *qtypes,
+ const char *name, Error **errp)
+{
+ if (!error_is_set(errp) && v->get_next_type) {
+ v->get_next_type(v, obj, qtypes, name, errp);
+ }
+}
+
void visit_type_enum(Visitor *v, int *obj, const char *strings[],
const char *kind, const char *name, Error **errp)
{
diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c
index 70864a1af2..bf42c04ea6 100644
--- a/qapi/qmp-input-visitor.c
+++ b/qapi/qmp-input-visitor.c
@@ -208,6 +208,19 @@ static void qmp_input_end_list(Visitor *v, Error **errp)
qmp_input_pop(qiv, errp);
}
+static void qmp_input_get_next_type(Visitor *v, int *kind, const int *qobjects,
+ const char *name, Error **errp)
+{
+ QmpInputVisitor *qiv = to_qiv(v);
+ QObject *qobj = qmp_input_get_object(qiv, name, false);
+
+ if (!qobj) {
+ error_set(errp, QERR_MISSING_PARAMETER, name ? name : "null");
+ return;
+ }
+ *kind = qobjects[qobject_type(qobj)];
+}
+
static void qmp_input_type_int(Visitor *v, int64_t *obj, const char *name,
Error **errp)
{
@@ -317,6 +330,7 @@ QmpInputVisitor *qmp_input_visitor_new(QObject *obj)
v->visitor.type_str = qmp_input_type_str;
v->visitor.type_number = qmp_input_type_number;
v->visitor.start_optional = qmp_input_start_optional;
+ v->visitor.get_next_type = qmp_input_get_next_type;
qmp_input_push(v, obj, NULL);
qobject_incref(obj);