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:
  void addRequestCursor(PageRequestCursor* cursor) { _cursors.push_back(cursor); }

  MLErrorCode processAll();

  MLErrorCode process(double timeBudget);

  bool needsProcessing();

  MLErrorCode processNextRequest(bool& moreWork);

  virtual void append(PageRequest* request);

  void removeCancelledRequests();

private:
  bool createMoreWork();

  std::deque<PageRequest*> _queue;

  std::vector<PageRequestCursor*> _cursors;
};

ML_END_NAMESPACE

#endif //of __mlPageRequestProcessor_H