X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fsession.c;h=7e4bfbb3144012eefe7a1ca28099367a36e1cbc0;hb=82b9f3d116ce0c982291a2dfdd15cd8a1c4cc16e;hp=b3fdfb54a2451b0ac506b0f82b452fda30ad6807;hpb=3bae09ab9fc3681e0ae3d2f16e862c831d43efc3;p=libsigrok.git

diff --git a/src/session.c b/src/session.c
index b3fdfb54..7e4bfbb3 100644
--- a/src/session.c
+++ b/src/session.c
@@ -53,7 +53,6 @@ struct datafeed_callback {
 
 /** Custom GLib event source for generic descriptor I/O.
  * @see https://developer.gnome.org/glib/stable/glib-The-Main-Event-Loop.html
- * @internal
  */
 struct fd_source {
 	GSource base;
@@ -1071,6 +1070,42 @@ static void datafeed_dump(const struct sr_datafeed_packet *packet)
 	}
 }
 
+/**
+ * Helper to send a meta datafeed package (SR_DF_META) to the session bus.
+ *
+ * @param sdi The device instance to send the package from. Must not be NULL.
+ * @param key The config key to send to the session bus.
+ * @param var The value to send to the session bus.
+ *
+ * @retval SR_OK Success.
+ * @retval SR_ERR_ARG Invalid argument.
+ *
+ * @private
+ */
+SR_PRIV int sr_session_send_meta(const struct sr_dev_inst *sdi,
+		uint32_t key, GVariant *var)
+{
+	struct sr_config *cfg;
+	struct sr_datafeed_packet packet;
+	struct sr_datafeed_meta meta;
+	int ret;
+
+	cfg = sr_config_new(key, var);
+
+	memset(&meta, 0, sizeof(meta));
+
+	packet.type = SR_DF_META;
+	packet.payload = &meta;
+
+	meta.config = g_slist_append(NULL, cfg);
+
+	ret = sr_session_send(sdi, &packet);
+	g_slist_free(meta.config);
+	sr_config_free(cfg);
+
+	return ret;
+}
+
 /**
  * Send a packet to whatever is listening on the datafeed bus.
  *