Make updatehealth an optional method for backends

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1961 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_backend.c

@@ -242,8 +242,8 @@ VBE_UpdateHealth(struct sess *sp, struct vbe_conn *vc, int a)
 	CHECK_OBJ_NOTNULL(vc->backend, BACKEND_MAGIC);
 	b = vc->backend;
 	AN(b->method);
-	AN(b->method->updatehealth);
-	b->method->updatehealth(sp, vc, a);
+	if(b->method->updatehealth != NULL)
+		b->method->updatehealth(sp, vc, a);
 	CHECK_OBJ_NOTNULL(b, BACKEND_MAGIC);
 }
 

bin/varnishd/cache_backend_simple.c

@@ -347,21 +347,6 @@ bes_GetHostname(struct backend *b)
 
 /*--------------------------------------------------------------------*/
 
-static void
-bes_UpdateHealth(struct sess *sp, struct vbe_conn *vc, int a)
-{
-	(void)sp;
-	(void)vc;
-	(void)a;
-	
-	/* 
-	 * Not of any use for simple backend. The global health
-	 * parameter of the backend should be enough.
-	 */
-}
-
-/*--------------------------------------------------------------------*/
-
 static void
 bes_Init(void)
 {
@@ -376,7 +361,6 @@ struct backend_method backend_method_simple = {
 	.close =		bes_ClosedFd,
 	.recycle =		bes_RecycleFd,
 	.gethostname =		bes_GetHostname,
-	.updatehealth =		bes_UpdateHealth,
 	.cleanup =		bes_Cleanup,
 	.init =			bes_Init
 };