ref-internal.h: do not increment ref count if release not set

A singleton BT object can choose to opt-out of the reference count
mechanism. The way to do this is to set the release callback to
NULL. When this is the case, do not increment its reference count;
keep it at its original value.

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/include/babeltrace/ref-internal.h b/include/babeltrace/ref-internal.h
index 8578de97b2ec1808eded8e9887961c1e3e7f4644..cf1547da9615345df8977f5fd95c8d7fb4fe3a57 100644 (file)
--- a/include/babeltrace/ref-internal.h
+++ b/include/babeltrace/ref-internal.h
@@ -50,6 +50,11 @@ static inline
 void bt_ref_get(struct bt_ref *ref)
 {
        assert(ref);
+
+       if (!ref->release) {
+               return;
+       }
+
        ref->count++;
        /* Overflow check. */
        assert(ref->count);