From 5edea6a09b57dc818acc966c6f5bfe21bc8a9c71 Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Mon, 16 Jul 2018 08:30:59 +0200
Subject: [PATCH] use more assertions to check node state machine

---
 lib/node.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/node.c b/lib/node.c
index e217d0ee7..c06b3160a 100644
--- a/lib/node.c
+++ b/lib/node.c
@@ -416,8 +416,8 @@ int node_read(struct node *n, struct sample *smps[], unsigned cnt, unsigned *rel
 {
 	int readd, nread = 0;
 
-	if (!n->_vt->read)
-		return -1;
+	assert(n->state == STATE_STARTED);
+	assert(node_type(n)->read);
 
 	/* Send in parts if vector not supported */
 	if (node_type(n)->vectorize > 0 && node_type(n)->vectorize < cnt) {
@@ -478,8 +478,8 @@ int node_write(struct node *n, struct sample *smps[], unsigned cnt, unsigned *re
 {
 	int sent, nsent = 0;
 
-	if (!n->_vt->write)
-		return -1;
+	assert(n->state == STATE_STARTED);
+	assert(node_type(n)->write);
 
 #ifdef WITH_HOOKS
 	/* Run write hooks */