vtkThreadMessager.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkThreadMessager.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef vtkThreadMessager_h
#define vtkThreadMessager_h

#include "vtkCommonSystemModule.h" // For export macro
#include "vtkObject.h"

#if defined(VTK_USE_PTHREADS)
#include <pthread.h> // Needed for pthread types
#endif

class VTKCOMMONSYSTEM_EXPORT vtkThreadMessager : public vtkObject
{
public:
  static vtkThreadMessager *New();

  vtkTypeMacro(vtkThreadMessager,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void WaitForMessage();

  void SendWakeMessage();

  void EnableWaitForReceiver();

  void DisableWaitForReceiver();

  void WaitForReceiver();

protected:
  vtkThreadMessager();
  ~vtkThreadMessager() override;

#ifdef VTK_USE_PTHREADS
  pthread_mutex_t Mutex;
  pthread_cond_t PSignal;
#endif

#ifdef VTK_USE_WIN32_THREADS
  vtkWindowsHANDLE WSignal;
#endif

private:
  vtkThreadMessager(const vtkThreadMessager&) = delete;
  void operator=(const vtkThreadMessager&) = delete;
};

#endif