Count dropped workers in _dec_instance_ref

Conflicts:
	src/stratifier.c

src/stratifier.c

@@ -1223,11 +1223,15 @@ static void client_drop_message(const int64_t client_id, const int dropped, cons
 	}
 }
 
+static void dec_worker(ckpool_t *ckp, user_instance_t *instance);
+
 /* Decrease the reference count of instance. */
 static void _dec_instance_ref(sdata_t *sdata, stratum_instance_t *client, const char *file,
 			      const char *func, const int line)
 {
+	user_instance_t *user = client->user_instance;
 	int64_t client_id = client->id;
+	ckpool_t *ckp = client->ckp;
 	int dropped = 0, ref;
 
 	ck_wlock(&sdata->instance_lock);
@@ -1235,7 +1239,7 @@ static void _dec_instance_ref(sdata_t *sdata, stratum_instance_t *client, const
 	/* See if there are any instances that were dropped that could not be
 	 * moved due to holding a reference and drop them now. */
 	if (unlikely(client->dropped && !ref))
-		dropped = __drop_client(sdata, client, client->user_instance);
+		dropped = __drop_client(sdata, client, user);
 	ck_wunlock(&sdata->instance_lock);
 
 	client_drop_message(client_id, dropped, true);
@@ -1243,6 +1247,9 @@ static void _dec_instance_ref(sdata_t *sdata, stratum_instance_t *client, const
 	/* This should never happen */
 	if (unlikely(ref < 0))
 		LOGERR("Instance ref count dropped below zero from %s %s:%d", file, func, line);
+
+	if (dropped)
+		dec_worker(ckp, user);
 }
 
 #define dec_instance_ref(sdata, instance) _dec_instance_ref(sdata, instance, __FILE__, __func__, __LINE__)