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/*=========================================================================
Program: Visualization Toolkit
Module: vtkMutexLock.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.
=========================================================================*/
// .NAME vtkMutexLock - mutual exclusion locking class
// .SECTION Description
// vtkMutexLock allows the locking of variables which are accessed
// through different threads. This header file also defines
// vtkSimpleMutexLock which is not a subclass of vtkObject.
#ifndef vtkMutexLock_h
#define vtkMutexLock_h
#include "vtkCommonCoreModule.h" // For export macro
#include "vtkObject.h"
#ifdef VTK_USE_SPROC
#include <abi_mutex.h> // Needed for SPROC implementation of mutex
typedef abilock_t vtkMutexType;
#endif
#if defined(VTK_USE_PTHREADS) || defined(VTK_HP_PTHREADS)
#include <pthread.h> // Needed for PTHREAD implementation of mutex
typedef pthread_mutex_t vtkMutexType;
#endif
#ifdef VTK_USE_WIN32_THREADS
typedef vtkWindowsHANDLE vtkMutexType;
#endif
#ifndef VTK_USE_SPROC
#ifndef VTK_USE_PTHREADS
#ifndef VTK_USE_WIN32_THREADS
typedef int vtkMutexType;
#endif
#endif
#endif
// Mutex lock that is not a vtkObject.
class VTKCOMMONCORE_EXPORT vtkSimpleMutexLock
{
public:
// left public purposely
vtkSimpleMutexLock();
virtual ~vtkSimpleMutexLock();
static vtkSimpleMutexLock *New();
void Delete() {delete this;}
// Description:
// Lock the vtkMutexLock
void Lock( void );
// Description:
// Unlock the vtkMutexLock
void Unlock( void );
protected:
friend class vtkSimpleConditionVariable;
vtkMutexType MutexLock;
private:
vtkSimpleMutexLock(const vtkSimpleMutexLock& other); // no copy constructor
vtkSimpleMutexLock& operator=(const vtkSimpleMutexLock& rhs); // no copy assignment
};
class VTKCOMMONCORE_EXPORT vtkMutexLock : public vtkObject
{
public:
static vtkMutexLock *New();
vtkTypeMacro(vtkMutexLock,vtkObject);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Lock the vtkMutexLock
void Lock( void );
// Description:
// Unlock the vtkMutexLock
void Unlock( void );
protected:
friend class vtkConditionVariable; // needs to get at SimpleMutexLock.
vtkSimpleMutexLock SimpleMutexLock;
vtkMutexLock() {}
private:
vtkMutexLock(const vtkMutexLock&); // Not implemented.
void operator=(const vtkMutexLock&); // Not implemented.
};
inline void vtkMutexLock::Lock( void )
{
this->SimpleMutexLock.Lock();
}
inline void vtkMutexLock::Unlock( void )
{
this->SimpleMutexLock.Unlock();
}
#endif
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