[PATCH] wl-server: add wl_client_get_object_for_interface

[Philipp Brüschweiler]

This method makes it possible to get access to an object assigned to a
client that implements a certain interface and has a certain data.
---
 src/wayland-server.c | 34 ++++++++++++++++++++++++++++++++++
 src/wayland-server.h |  4 ++++
 2 Dateien geändert, 38 Zeilen hinzugefügt(+)

diff --git a/src/wayland-server.c b/src/wayland-server.c
index 88e8433..55b2f04 100644
--- a/src/wayland-server.c
+++ b/src/wayland-server.c
@@ -412,6 +412,40 @@ wl_client_get_object(struct wl_client *client, uint32_t id)
 	return wl_map_lookup(&client->objects, id);
 }
 
+struct wl_client_get_object_data {
+	const struct wl_interface *interface;
+	void *data;
+	struct wl_resource *result;
+};
+
+static void
+wl_client_get_object_for_interface_helper(void *element, void *data)
+{
+	struct wl_resource *resource = element;
+	struct wl_client_get_object_data *search_data = data;
+
+	if (resource->object.interface == search_data->interface
+	    && resource->data == search_data->data)
+		search_data->result = resource;
+}
+
+WL_EXPORT struct wl_resource *
+wl_client_get_object_for_interface(struct wl_client *client,
+				   const struct wl_interface *interface,
+				   void *data)
+{
+	struct wl_client_get_object_data search_data;
+	search_data.interface = interface;
+	search_data.data = data;
+	search_data.result = NULL;
+
+	wl_map_for_each(&client->objects,
+			wl_client_get_object_for_interface_helper,
+			&search_data);
+
+	return search_data.result;
+}
+
 WL_EXPORT void
 wl_resource_post_no_memory(struct wl_resource *resource)
 {
diff --git a/src/wayland-server.h b/src/wayland-server.h
index f092145..9d743bc 100644
--- a/src/wayland-server.h
+++ b/src/wayland-server.h
@@ -123,6 +123,10 @@ wl_client_new_object(struct wl_client *client,
 		     const void *implementation, void *data);
 struct wl_resource *
 wl_client_get_object(struct wl_client *client, uint32_t id);
+struct wl_resource *
+wl_client_get_object_for_interface(struct wl_client *client,
+				   const struct wl_interface *interface,
+				   void *data);
 
 struct wl_listener {
 	struct wl_list link;
-- 
1.7.11.4