diff --git a/pubsub/list.h b/pubsub/list.h
new file mode 100644
index 0000000..27d1612
--- /dev/null
+++ b/pubsub/list.h
@@ -0,0 +1,23 @@
+
+#ifndef LIST_H
+#define LIST_H
+
+struct link {
+	struct link* next;
+	char value[];
+};
+
+typedef struct {
+	struct link* head;
+	struct link* tail;
+	size_t element_size;
+	size_t length;
+} List;
+
+List* list_new(size_t);
+void* list_append(List*);
+void  list_remove(List*, size_t);
+void  list_free(List*);
+
+#endif
+