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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 {
+ ceph::mutex lock = ceph::make_mutex("QueueStrategy::lock");
+ const int n_threads;
+ bool stop;
+
+ Message::Queue mqueue;
+
+ class QSThread : public Thread {
+ public:
+ bi::list_member_hook<> thread_q;
+ QueueStrategy *dq;
+ ceph::condition_variable cond;
+ explicit QSThread(QueueStrategy *dq) : thread_q(), dq(dq) {}
+ 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 */