lib: Add reordering queue to FRCT

This adds a reordering queue to FRCT so that SDUs can be delivered
in-order when requested.

1 files changed, 47 insertions, 0 deletions

diff --git a/include/ouroboros/rq.h b/include/ouroboros/rq.h
new file mode 100644
index 00000000..7c024c11
--- /dev/null
+++ b/include/ouroboros/rq.h
@@ -0,0 +1,47 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Reordering queue
+ *
+ *    Dimitri Staessens <[email protected]>
+ *    Sander Vrijders   <[email protected]>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., http://www.fsf.org/about/contact/.
+ */
+
+#ifndef OUROBOROS_LIB_RQ_H
+#define OUROBOROS_LIB_RQ_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+struct rq * rq_create(int size);
+
+void        rq_destroy(struct rq * rq);
+
+int         rq_push(struct rq * rq,
+                    uint64_t    seqno,
+                    size_t      idx);
+
+uint64_t    rq_peek(struct rq * rq);
+
+bool        rq_is_empty(struct rq * rq);
+
+size_t      rq_pop(struct rq * rq);
+
+bool        rq_has(struct rq * rq,
+                   uint64_t    seqno);
+
+#endif /* OUROBOROS_LIB_RQ_H */