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+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * Reordering queue
+ *
+ * Dimitri Staessens <dimitri.staessens@ugent.be>
+ * Sander Vrijders <sander.vrijders@ugent.be>
+ *
+ * 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 */