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csutil/threadjobqueue.h

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00001 /*
00002     Copyright (C) 2005 by Jorrit Tyberghein
00003               (C) 2005 by Frank Richter
00004 
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Library General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009 
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Library General Public License for more details.
00014 
00015     You should have received a copy of the GNU Library General Public
00016     License along with this library; if not, write to the Free
00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 */
00019 
00020 #ifndef __CS_CSUTIL_THREADJOBQUEUE_H__
00021 #define __CS_CSUTIL_THREADJOBQUEUE_H__
00022 
00027 #include "csextern.h"
00028 #include "csutil/fifo.h"
00029 #include "csutil/scf_implementation.h"
00030 #include "csutil/thread.h"
00031 #include "iutil/job.h"
00032 
00036 class CS_CRYSTALSPACE_EXPORT csThreadJobQueue : 
00037   public scfImplementation1<csThreadJobQueue, iJobQueue>
00038 {
00039   typedef csFIFO<csRef<iJob> > JobFifo;
00040   struct QueueAndRunnableShared
00041   {
00042     JobFifo* jobFifo;
00043     csRef<csMutex> fifoXS;
00044     csRef<csCondition> queueWake;
00045     csRef<iJob>* currentJob;
00046     csRef<csMutex> jobXS;
00047     csRef<csCondition> jobFinish;
00048   };
00049   class CS_CRYSTALSPACE_EXPORT QueueRunnable : public csRunnable
00050   {
00051     int refCount;
00052     QueueAndRunnableShared sharedData;
00053   public:
00054     QueueRunnable (const QueueAndRunnableShared& sharedData);
00055     virtual ~QueueRunnable();
00056 
00057     virtual void Run ();
00058     virtual void IncRef();
00059     virtual void DecRef();
00060     virtual int GetRefCount();
00061   };
00062   csRef<csThread> queueThread;
00063   QueueAndRunnableShared sharedData;
00064   csRef<iJob> currentJob;
00065   csRef<csMutex> jobFinishMutex;
00066   // stats
00067   uint jobsAdded, jobsPulled, jobsWaited, jobsUnqueued;
00068 public:
00069 
00070   csThreadJobQueue();
00071   virtual ~csThreadJobQueue();
00072 
00073   virtual void Enqueue (iJob* job);
00074   virtual void PullAndRun (iJob* job);
00075   virtual void Unqueue (iJob* job, bool waitIfCurrent = true);
00076 };
00077 
00078 #endif // __CS_CSUTIL_THREADJOBQUEUE_H__

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