MeVis/Foundation/Sources/MLBackgroundTasks/mlBackgroundTaskHandle.h

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// **InsertLicense** code
//----------------------------------------------------------------------------------
//----------------------------------------------------------------------------------


#ifndef __mlBackgroundTaskHandle_H
#define __mlBackgroundTaskHandle_H


// Local includes
#include "MLBackgroundTasksSystem.h"

ML_START_NAMESPACE

//-----------------------------------------------------------------------

class BackgroundTask;


class MLBACKGROUNDTASKS_EXPORT BackgroundTaskHandle
{
public:
  BackgroundTaskHandle() { _task = NULL; }

  void clear();

  bool hasTask();

  bool hasRunningTask();

  bool isCanceled();

  void cancel();

  void setOwnerWasDeleted();

protected:
  friend class BackgroundTaskManager;
  friend class BackgroundTaskHandleAccessor;
  BackgroundTaskHandle(BackgroundTask* task) { _task = task; }

  BackgroundTask* _task;
};

class BackgroundTaskHandleAccessor
{
public:
  inline static BackgroundTask* get(const BackgroundTaskHandle& handle) { return handle._task; }
};

ML_END_NAMESPACE

#endif