Make init an optional method for backends

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1962 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_backend.c

@@ -249,12 +249,22 @@ VBE_UpdateHealth(struct sess *sp, struct vbe_conn *vc, int a)
 
 /*--------------------------------------------------------------------*/
 
+static void
+VBE_AddBackendMethod(struct backend_method *bem)
+{
+
+	if (bem->init != NULL)
+		bem->init();
+}
+
+/*--------------------------------------------------------------------*/
+
 void
 VBE_Init(void)
 {
 
 	MTX_INIT(&VBE_mtx);
-	backend_method_simple.init();
-	backend_method_random.init();
-	backend_method_round_robin.init();
+	VBE_AddBackendMethod(&backend_method_simple);
+	VBE_AddBackendMethod(&backend_method_random);
+	VBE_AddBackendMethod(&backend_method_round_robin);
 }

bin/varnishd/cache_backend_simple.c

@@ -347,14 +347,6 @@ bes_GetHostname(struct backend *b)
 
 /*--------------------------------------------------------------------*/
 
-static void
-bes_Init(void)
-{
-
-}
-
-/*--------------------------------------------------------------------*/
-
 struct backend_method backend_method_simple = {
 	.name =			"simple",
 	.getfd =		bes_GetFd,
@@ -362,7 +354,6 @@ struct backend_method backend_method_simple = {
 	.recycle =		bes_RecycleFd,
 	.gethostname =		bes_GetHostname,
 	.cleanup =		bes_Cleanup,
-	.init =			bes_Init
 };
 
 /*--------------------------------------------------------------------*/