sr: add GSList of instances to the driver struct

This gives the driver a private place to keep its instances, without
polluting the global namespace.

diff --git a/libsigrok.h b/libsigrok.h
index 42406d5419b568ca3077452e08be4a261000924f..2b07236a53136d9e1ac16473e2b43085df7111c6 100644 (file)
--- a/libsigrok.h
+++ b/libsigrok.h
@@ -490,6 +490,9 @@ struct sr_dev_driver {
        int (*dev_config_set) (int dev_index, int hwcap, const void *value);
        int (*dev_acquisition_start) (int dev_index, void *session_dev_id);
        int (*dev_acquisition_stop) (int dev_index, void *session_dev_id);
+
+       /* Dynamic */
+       GSList *instances;
 };
 
 struct sr_session {