icinga2/lib/base/workqueue.h

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
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* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef WORKQUEUE_H
#define WORKQUEUE_H
#include "base/i2-base.h"
#include "base/timer.h"
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#include <deque>
#include <boost/function.hpp>
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#include <boost/thread/thread.hpp>
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#include <boost/thread/mutex.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/exception_ptr.hpp>
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namespace icinga
{
typedef boost::function<void (void)> WorkCallback;
struct WorkItem
{
WorkCallback Callback;
bool AllowInterleaved;
};
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/**
* A workqueue.
*
* @ingroup base
*/
class I2_BASE_API WorkQueue
{
public:
typedef boost::function<void (boost::exception_ptr)> ExceptionCallback;
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WorkQueue(size_t maxItems = 25000);
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~WorkQueue(void);
void Enqueue(const WorkCallback& callback, bool allowInterleaved = false);
void Join(bool stop = false);
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boost::thread::id GetThreadId(void) const;
void SetExceptionCallback(const ExceptionCallback& callback);
size_t GetLength(void);
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private:
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int m_ID;
static int m_NextID;
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boost::mutex m_Mutex;
boost::condition_variable m_CVEmpty;
boost::condition_variable m_CVFull;
boost::condition_variable m_CVStarved;
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boost::thread m_Thread;
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size_t m_MaxItems;
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bool m_Stopped;
bool m_Processing;
std::deque<WorkItem> m_Items;
ExceptionCallback m_ExceptionCallback;
Timer::Ptr m_StatusTimer;
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void WorkerThreadProc(void);
void StatusTimerHandler(void);
static void DefaultExceptionCallback(boost::exception_ptr exp);
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};
class I2_BASE_API ParallelWorkQueue
{
public:
ParallelWorkQueue(void);
~ParallelWorkQueue(void);
void Enqueue(const boost::function<void(void)>& callback);
void Join(void);
private:
unsigned int m_QueueCount;
WorkQueue *m_Queues;
unsigned int m_Index;
};
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}
#endif /* WORKQUEUE_H */