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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__