osmux: Test cid allocation and de-allocation
* Test that one can get an id
* That they are assigned predicatble right now
* That returning them will make the number of used ones go down
* That allocating more will fail
diff --git a/openbsc/include/openbsc/osmux.h b/openbsc/include/openbsc/osmux.h
index 8c01fd0..0e727d5 100644
--- a/openbsc/include/openbsc/osmux.h
+++ b/openbsc/include/openbsc/osmux.h
@@ -22,6 +22,7 @@
int osmux_get_cid(void);
void osmux_put_cid(uint8_t osmux_cid);
+int osmux_used_cid(void);
enum osmux_state {
OSMUX_STATE_DISABLED = 0,