initial code repo

[stor4nfv.git] / src / ceph / src / msg / QueueStrategy.h

diff --git a/src/ceph/src/msg/QueueStrategy.h b/src/ceph/src/msg/QueueStrategy.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) 2014 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 QUEUE_STRATEGY_H
+#define QUEUE_STRATEGY_H
+
+#include <vector>
+#include <memory>
+#include <boost/intrusive/list.hpp>
+#include "DispatchStrategy.h"
+#include "msg/Messenger.h"
+
+namespace bi = boost::intrusive;
+
+class QueueStrategy : public DispatchStrategy {
+  Mutex lock;
+  const int n_threads;
+  bool stop;
+
+  Message::Queue mqueue;
+
+  class QSThread : public Thread {
+  public:
+    bi::list_member_hook<> thread_q;
+    QueueStrategy *dq;
+    Cond cond;
+    explicit QSThread(QueueStrategy *dq) : thread_q(), dq(dq), cond() {}
+    void* entry() {
+      dq->entry(this);
+      return NULL;
+    }
+
+    typedef bi::list< QSThread,
+                     bi::member_hook< QSThread,
+                                      bi::list_member_hook<>,
+                                      &QSThread::thread_q > > Queue;
+  };
+
+  std::vector<std::unique_ptr<QSThread>> threads; //< all threads
+  QSThread::Queue disp_threads; //< waiting threads
+
+public:
+  explicit QueueStrategy(int n_threads);
+  void ds_dispatch(Message *m) override;
+  void shutdown() override;
+  void start() override;
+  void wait() override;
+  void entry(QSThread *thrd);
+  virtual ~QueueStrategy() {}
+};
+#endif /* QUEUE_STRATEGY_H */