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/*
//
// Copyright 1997-2009 Torsten Rohlfing
//
// Copyright 2004-2011 SRI International
//
// This file is part of the Computational Morphometry Toolkit.
//
// http://www.nitrc.org/projects/cmtk/
//
// The Computational Morphometry Toolkit is free software: you can
// redistribute it and/or modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// The Computational Morphometry Toolkit is distributed in the hope that it
// will be useful, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with the Computational Morphometry Toolkit. If not, see
// <http://www.gnu.org/licenses/>.
//
// $Revision: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkLockingPtr_h_included_
#define __cmtkLockingPtr_h_included_
#include <cmtkconfig.h>
#include <System/cmtkMutexLock.h>
namespace
cmtk
{
/** \addtogroup System */
//@{
/** Class for mutually exclusive access to objects.
* This class is an adapted version of a concept by Andrei Alexandrescu of
* RealNetworks Inc.
*\see http://www.cuj.com/experts/1902/alexandr.htm?topic=experts
*/
template<class T>
class LockingPtr
{
public:
/// Create locking pointer and lock mutex.
LockingPtr( T& object, MutexLock& mutexLock ) :
m_Object( &object ),
m_MutexLock( &mutexLock )
{
this->m_MutexLock->Lock();
}
/// Destroy locking pointer and unlock mutex.
~LockingPtr()
{
this->m_MutexLock->Unlock();
}
/// Dereferencing operator.
T& operator*()
{
return *this->m_Object;
}
/// Member access operator.
T* operator->()
{
return this->m_Object;
}
private:
/// Pointer to the accessed object.
T* m_Object;
/// The mutex lock.
MutexLock* m_MutexLock;
};
//@}
} // namespace cmtk
#endif // #ifndef __cmtkLockingPtr_h_included_
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