diff options
| -rw-r--r-- | hw/qdev.c | 26 | ||||
| -rw-r--r-- | hw/qdev.h | 20 |
2 files changed, 46 insertions, 0 deletions
@@ -1174,6 +1174,32 @@ DeviceState *qdev_get_root(void) return qdev_root; } +static void qdev_get_child_property(DeviceState *dev, Visitor *v, void *opaque, + const char *name, Error **errp) +{ + DeviceState *child = opaque; + gchar *path; + + path = qdev_get_canonical_path(child); + visit_type_str(v, &path, name, errp); + g_free(path); +} + +void qdev_property_add_child(DeviceState *dev, const char *name, + DeviceState *child, Error **errp) +{ + gchar *type; + + type = g_strdup_printf("child<%s>", child->info->name); + + qdev_property_add(dev, name, type, qdev_get_child_property, + NULL, NULL, child, errp); + + qdev_ref(child); + + g_free(type); +} + static gchar *qdev_get_path_in(DeviceState *parent, DeviceState *dev) { DeviceProperty *prop; @@ -527,4 +527,24 @@ gchar *qdev_get_canonical_path(DeviceState *dev); */ DeviceState *qdev_resolve_path(const char *path, bool *ambiguous); +/** + * @qdev_property_add_child - Add a child property to a device + * + * Child properties form the composition tree. All devices need to be a child + * of another device. Devices can only be a child of one device. + * + * There is no way for a child to determine what its parent is. It is not + * a bidirectional relationship. This is by design. + * + * @dev - the device to add a property to + * + * @name - the name of the property + * + * @child - the child device + * + * @errp - if an error occurs, a pointer to an area to store the area + */ +void qdev_property_add_child(DeviceState *dev, const char *name, + DeviceState *child, Error **errp); + #endif |