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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkMutexLockHolder_h
#define itkMutexLockHolder_h
#include "itkMacro.h"
namespace itk
{
/** \class MutexLockHolder
* \brief A container to store a Mutex.
* This holder class for ensuring that locks are released in
* the event of an exception being thrown after the lock was
* created.
*
* \ingroup ITKCommon
*/
template< typename TMutex >
class MutexLockHolder
{
public:
typedef MutexLockHolder Self;
typedef TMutex MutexType;
MutexLockHolder(MutexType & mutex, const bool noblock=false)
:m_Mutex(mutex),
m_LockCaptured(true)
{
if( noblock == false )
{
m_Mutex.Lock();
}
else
{
m_LockCaptured = m_Mutex.TryLock();
}
}
/** True if the holder has acquired the lock, for no-blocking
+ constructor this will always be true.
*/
inline bool GetLockCaptured() const { return this->m_LockCaptured; }
operator bool () const { return this->m_LockCaptured; }
~MutexLockHolder()
{
if ( m_LockCaptured )
{
m_Mutex.Unlock();
}
}
protected:
MutexType & m_Mutex;
bool m_LockCaptured;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(MutexLockHolder);
};
} //end itk namespace
#endif
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