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93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkThreadMessager.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkThreadMessager
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* @brief A class for performing inter-thread messaging
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*
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* vtkMultithreader is a class that provides support for messaging between
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* threads multithreaded using pthreads or Windows messaging.
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*/
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#ifndef vtkThreadMessager_h
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#define vtkThreadMessager_h
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#include "vtkCommonSystemModule.h" // For export macro
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#include "vtkObject.h"
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#if defined(VTK_USE_PTHREADS) || defined(VTK_HP_PTHREADS)
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#include <pthread.h> // Needed for pthread types
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#endif
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class VTKCOMMONSYSTEM_EXPORT vtkThreadMessager : public vtkObject
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{
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public:
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static vtkThreadMessager *New();
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vtkTypeMacro(vtkThreadMessager,vtkObject);
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void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
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/**
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* Wait (block, non-busy) until another thread sends a
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* message.
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*/
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void WaitForMessage();
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/**
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* Send a message to all threads who are waiting via
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* WaitForMessage().
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*/
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void SendWakeMessage();
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/**
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* pthreads only. If the wait is enabled, the thread who
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* is to call WaitForMessage() will block until a receiver
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* thread is ready to receive.
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*/
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void EnableWaitForReceiver();
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/**
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* pthreads only. If the wait is enabled, the thread who
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* is to call WaitForMessage() will block until a receiver
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* thread is ready to receive.
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*/
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void DisableWaitForReceiver();
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/**
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* pthreads only.
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* If wait is enable, this will block until one thread is ready
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* to receive a message.
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*/
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void WaitForReceiver();
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protected:
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vtkThreadMessager();
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~vtkThreadMessager() VTK_OVERRIDE;
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#ifdef VTK_USE_PTHREADS
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pthread_mutex_t Mutex;
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pthread_cond_t PSignal;
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#endif
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#ifdef VTK_USE_WIN32_THREADS
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vtkWindowsHANDLE WSignal;
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#endif
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private:
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vtkThreadMessager(const vtkThreadMessager&) VTK_DELETE_FUNCTION;
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void operator=(const vtkThreadMessager&) VTK_DELETE_FUNCTION;
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};
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#endif
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