initial code repo

[stor4nfv.git] / src / ceph / src / msg / xio / XioInSeq.h

diff --git a/src/ceph/src/msg/xio/XioInSeq.h b/src/ceph/src/msg/xio/XioInSeq.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ * Portions Copyright (C) 2013 CohortFS, LLC
+ *
+ * This 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.  See file COPYING.
+ *
+ */
+
+#ifndef XIO_IN_SEQ_H
+#define XIO_IN_SEQ_H
+
+#include <boost/intrusive/list.hpp>
+#include "msg/SimplePolicyMessenger.h"
+extern "C" {
+#include "libxio.h"
+}
+
+/* For inbound messages (Accelio-owned) ONLY, use the message's
+ * user_context as an SLIST */
+class XioInSeq {
+private:
+  int cnt;
+  int sz;
+  struct xio_msg* head;
+  struct xio_msg* tail;
+
+public:
+  XioInSeq() : cnt(0), sz(0), head(NULL), tail(NULL) {}
+  XioInSeq(const XioInSeq& seq) {
+    cnt = seq.cnt;
+    sz = seq.sz;
+    head = seq.head;
+    tail = seq.tail;
+  }
+
+  int count() { return cnt; }
+
+  int size() { return sz; }
+
+  bool p() { return !!head; }
+
+  void set_count(int _cnt) { cnt = _cnt; }
+
+  void append(struct xio_msg* msg) {
+    msg->user_context = NULL;
+    if (!head) {
+      head = tail = msg;
+    } else {
+      tail->user_context = msg;
+      tail = msg;
+    }
+    ++sz;
+    --cnt;
+  }
+
+  struct xio_msg* begin() { return head; }
+
+  struct xio_msg* end() { return NULL; }
+
+  void next(struct xio_msg** msg) {
+    *msg = static_cast<struct xio_msg *>((*msg)->user_context);
+  }
+
+  struct xio_msg* dequeue() {
+    struct xio_msg* msgs = head;
+    clear();
+    return msgs;
+  }
+
+  void clear() {
+    head = tail = NULL;
+    cnt = 0;
+    sz = 0;
+  }
+};
+
+#endif /* XIO_IN_SEQ_H */