mirror of
https://github.com/Icinga/icinga2.git
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142 lines
3.9 KiB
C++
142 lines
3.9 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2017 Icinga Development Team (https://www.icinga.com/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#ifndef WORKQUEUE_H
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#define WORKQUEUE_H
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#include "base/i2-base.hpp"
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#include "base/timer.hpp"
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#include "base/ringbuffer.hpp"
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#include <boost/thread/thread.hpp>
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#include <boost/thread/mutex.hpp>
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#include <boost/thread/condition_variable.hpp>
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#include <boost/exception_ptr.hpp>
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#include <queue>
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#include <deque>
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#include <atomic>
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namespace icinga
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{
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enum WorkQueuePriority
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{
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PriorityLow,
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PriorityNormal,
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PriorityHigh
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};
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struct Task
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{
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Task(void)
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: Priority(PriorityNormal), ID(-1)
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{ }
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Task(std::function<void (void)>&& function, WorkQueuePriority priority, int id)
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: Function(std::move(function)), Priority(priority), ID(id)
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{ }
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std::function<void (void)> Function;
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WorkQueuePriority Priority;
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int ID;
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};
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inline bool operator<(const Task& a, const Task& b)
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{
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if (a.Priority < b.Priority)
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return true;
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if (a.Priority == b.Priority) {
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if (a.ID > b.ID)
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return true;
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else
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return false;
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}
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return false;
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}
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/**
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* A workqueue.
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*
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* @ingroup base
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*/
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class I2_BASE_API WorkQueue
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{
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public:
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typedef std::function<void (boost::exception_ptr)> ExceptionCallback;
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WorkQueue(size_t maxItems = 0, int threadCount = 1);
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~WorkQueue(void);
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void SetName(const String& name);
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String GetName(void) const;
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void Enqueue(std::function<void (void)>&& function, WorkQueuePriority priority = PriorityNormal,
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bool allowInterleaved = false);
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void Join(bool stop = false);
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bool IsWorkerThread(void) const;
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size_t GetLength(void) const;
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size_t GetTaskCount(RingBuffer::SizeType span);
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void SetExceptionCallback(const ExceptionCallback& callback);
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bool HasExceptions(void) const;
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std::vector<boost::exception_ptr> GetExceptions(void) const;
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void ReportExceptions(const String& facility) const;
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protected:
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void IncreaseTaskCount(void);
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private:
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int m_ID;
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String m_Name;
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static std::atomic<int> m_NextID;
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int m_ThreadCount;
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bool m_Spawned;
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mutable boost::mutex m_Mutex;
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boost::condition_variable m_CVEmpty;
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boost::condition_variable m_CVFull;
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boost::condition_variable m_CVStarved;
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boost::thread_group m_Threads;
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size_t m_MaxItems;
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bool m_Stopped;
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int m_Processing;
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std::priority_queue<Task, std::deque<Task> > m_Tasks;
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int m_NextTaskID;
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ExceptionCallback m_ExceptionCallback;
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std::vector<boost::exception_ptr> m_Exceptions;
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Timer::Ptr m_StatusTimer;
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double m_StatusTimerTimeout;
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mutable boost::mutex m_StatsMutex;
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RingBuffer m_TaskStats;
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size_t m_PendingTasks;
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double m_PendingTasksTimestamp;
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void WorkerThreadProc(void);
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void StatusTimerHandler(void);
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};
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}
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#endif /* WORKQUEUE_H */
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