icinga2/lib/base/workqueue.hpp

105 lines
3.0 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* 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.hpp"
#include "base/timer.hpp"
#include <deque>
#include <boost/function.hpp>
#include <boost/thread/thread.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/exception_ptr.hpp>
namespace icinga
{
typedef boost::function<void (void)> WorkCallback;
struct WorkItem
{
WorkCallback Callback;
bool AllowInterleaved;
};
/**
* A workqueue.
*
* @ingroup base
*/
class I2_BASE_API WorkQueue
{
public:
typedef boost::function<void (boost::exception_ptr)> ExceptionCallback;
WorkQueue(size_t maxItems = 25000);
~WorkQueue(void);
void Enqueue(const WorkCallback& callback, bool allowInterleaved = false);
void Join(bool stop = false);
boost::thread::id GetThreadId(void) const;
void SetExceptionCallback(const ExceptionCallback& callback);
size_t GetLength(void);
private:
int m_ID;
static int m_NextID;
boost::mutex m_Mutex;
boost::condition_variable m_CVEmpty;
boost::condition_variable m_CVFull;
boost::condition_variable m_CVStarved;
boost::thread m_Thread;
size_t m_MaxItems;
bool m_Stopped;
bool m_Processing;
std::deque<WorkItem> m_Items;
ExceptionCallback m_ExceptionCallback;
Timer::Ptr m_StatusTimer;
void WorkerThreadProc(void);
void StatusTimerHandler(void);
static void DefaultExceptionCallback(boost::exception_ptr exp);
};
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;
};
}
#endif /* WORKQUEUE_H */