MeVis/Foundation/Sources/ML/include/host/mlPageRequestProcessor.h

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// **InsertLicense** code
//-------------------------------------------------------------------------
//-------------------------------------------------------------------------
#ifndef __mlPageRequestProcessor_H
#define __mlPageRequestProcessor_H

// ML-includes
#ifndef __mlInitSystemML_H
#include "mlInitSystemML.h"
#endif

#include "mlInitSystemML.h"

ML_START_NAMESPACE

class TileRequest;
class PageRequest;
class PageRequestCursor;

//-------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------
class MLEXPORT PageRequestQueueInterface
{
public:
  virtual ~PageRequestQueueInterface() {};

  virtual void append(PageRequest* request) = 0;
};


//-------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------
class MLEXPORT PageRequestProcessor : public PageRequestQueueInterface
{
public:
  virtual ~PageRequestProcessor() {}

  virtual void addRootTileRequest(TileRequest* tileRequest) = 0;

  virtual void processAll() = 0;

  virtual void process(double timeBudget) = 0;

  virtual bool needsProcessing() = 0;

  virtual void removeCancelledRequests() = 0;

  virtual void enterProcessingScope() = 0;

  virtual void leaveProcessingScope() = 0;

  virtual void setNumWorkerThreads(int /*threads*/) = 0;

  static void enableTileRequestAllocationFailure(int count = 1);
  static void disableTileRequestAllocationFailure();

};


ML_END_NAMESPACE

#endif //of __mlPageRequestProcessor_H