* bt_ctf_clock_get and bt_ctf_clock_put: increment and decrement the
* refcount of the clock
*
+ * You may also use bt_ctf_get() and bt_ctf_put() with clock objects.
+ *
* These functions ensure that the clock won't be destroyed when it
* is in use. The same number of get and put (plus one extra put to
* release the initial reference done at creation) has to be done to