/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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
 *
 *         https://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.
 *
 *=========================================================================*/
#include "itkTimeStamp.h"

#include "itkSingleton.h"

namespace itk
{

itkGetGlobalValueMacro(TimeStamp, TimeStamp::GlobalTimeStampType, GlobalTimeStamp, 0);


/**
 * Instance creation.
 */
TimeStamp *
TimeStamp::New()
{
  return new Self;
}


/**
 * Make sure the new time stamp is greater than all others so far.
 */
void
TimeStamp::Modified()
{
  // This is called once, on-demand to ensure that m_GlobalTimeStamp is
  // initialized.
  itkInitGlobalsMacro(GlobalTimeStamp);
  this->m_ModifiedTime = ++(*m_GlobalTimeStamp);
}

TimeStamp::GlobalTimeStampType * TimeStamp::m_GlobalTimeStamp;

} // end namespace itk
