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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.
=========================================================================*/
/**
* @class vtkThreadMessager
* @brief A class for performing inter-thread messaging
*
* vtkThreadMessager is a class that provides support for messaging between
* threads multithreaded using pthreads or Windows messaging.
*/
#ifndef vtkThreadMessager_h
#define vtkThreadMessager_h
#include "vtkDeprecation.h" // For VTK_DEPRECATED_IN_9_1_0
#include "vtkCommonSystemModule.h" // For export macro
#include "vtkObject.h"
#include "vtkThreads.h" // for VTK_USE_PTHREADS and VTK_USE_WIN32_THREADS
#if defined(VTK_USE_PTHREADS)
#include <pthread.h> // Needed for pthread types
#endif
class VTK_DEPRECATED_IN_9_1_0(
"Use C++ STL threading classes") VTKCOMMONSYSTEM_EXPORT vtkThreadMessager : public vtkObject
{
public:
static vtkThreadMessager* New();
vtkTypeMacro(vtkThreadMessager, vtkObject);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Wait (block, non-busy) until another thread sends a
* message.
*/
void WaitForMessage();
/**
* Send a message to all threads who are waiting via
* WaitForMessage().
*/
void SendWakeMessage();
/**
* pthreads only. If the wait is enabled, the thread who
* is to call WaitForMessage() will block until a receiver
* thread is ready to receive.
*/
void EnableWaitForReceiver();
/**
* pthreads only. If the wait is enabled, the thread who
* is to call WaitForMessage() will block until a receiver
* thread is ready to receive.
*/
void DisableWaitForReceiver();
/**
* pthreads only.
* If wait is enable, this will block until one thread is ready
* to receive a message.
*/
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
// VTK-HeaderTest-Exclude: vtkThreadMessager.h
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