sd-bus: add helper struct for interface definitions

The idea is to have a static table that defines the dbus API. The vtable is
defined right next to the interface name and path because they are logically
connected.

1 files changed, 26 insertions, 3 deletions

diff --git a/src/shared/bus-util.h b/src/shared/bus-util.h
index fd1820ca7e..a985523cd0 100644
--- a/src/shared/bus-util.h
+++ b/src/shared/bus-util.h
@@ -23,11 +23,32 @@ typedef enum BusTransport {
 } BusTransport;
 
 typedef struct BusLocator {
-        const char    *destination;
-        const char    *path;
-        const char    *interface;
+        const char *destination;
+        const char *path;
+        const char *interface;
 } BusLocator;
 
+typedef struct BusObjectImplementation BusObjectImplementation;
+
+typedef struct BusObjectVtablePair {
+        const sd_bus_vtable *vtable;
+        sd_bus_object_find_t object_find;
+} BusObjectVtablePair;
+
+struct BusObjectImplementation {
+        const char *path;
+        const char *interface;
+        const sd_bus_vtable **vtables;
+        const BusObjectVtablePair *fallback_vtables;
+        sd_bus_node_enumerator_t node_enumerator;
+        bool manager;
+        const BusObjectImplementation **children;
+};
+
+#define BUS_VTABLES(...) ((const sd_bus_vtable* []){ __VA_ARGS__, NULL })
+#define BUS_FALLBACK_VTABLES(...) ((const BusObjectVtablePair[]) { __VA_ARGS__, {} })
+#define BUS_IMPLEMENTATIONS(...) ((const BusObjectImplementation* []) { __VA_ARGS__, NULL })
+
 typedef int (*bus_property_set_t) (sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata);
 
 struct bus_properties_map {
@@ -199,3 +220,5 @@ int bus_set_property(sd_bus *bus, const BusLocator *locator, const char *member,
 int bus_match_signal(sd_bus *bus, sd_bus_slot **ret, const BusLocator *locator, const char *member, sd_bus_message_handler_t callback, void *userdata);
 int bus_match_signal_async(sd_bus *bus, sd_bus_slot **ret, const BusLocator *locator, const char *member, sd_bus_message_handler_t callback, sd_bus_message_handler_t install_callback, void *userdata);
 int bus_message_new_method_call(sd_bus *bus, sd_bus_message **m, const BusLocator *locator, const char *member);
+
+int bus_add_implementation(sd_bus *bus, const BusObjectImplementation *impl, void *userdata);