itkThreadedIteratorRangePartitioner.h

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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.
 *
 *=========================================================================*/
#ifndef itkThreadedIteratorRangePartitioner_h
#define itkThreadedIteratorRangePartitioner_h

#include "itkThreadedDomainPartitioner.h"
#include "itkObjectFactory.h"

namespace itk
{

// Forward reference because of circular dependencies
template< typename TIterator >
class ITK_TEMPLATE_EXPORT ThreadedIteratorRangePartitioner;

template< typename TIterator >
class ITK_TEMPLATE_EXPORT ThreadedIteratorRangePartitionerDomain
{
public:
  using IteratorType = TIterator;
  using Self = ThreadedIteratorRangePartitionerDomain;

  ThreadedIteratorRangePartitionerDomain() = default;

  ThreadedIteratorRangePartitionerDomain( const IteratorType & begin, const IteratorType & end )
    {
    this->m_Begin = begin;
    this->m_End = end;
    }

  ThreadedIteratorRangePartitionerDomain( const Self & rhs )
    {
    this->m_Begin = rhs.m_Begin;
    this->m_End   = rhs.m_End;
    }

  void operator=( const Self & rhs )
    {
    if ( this == & rhs )
      {
      return;
      }
    this->m_Begin = rhs.m_Begin;
    this->m_End   = rhs.m_End;
    }

  const IteratorType & Begin() const
    {
    return this->m_Begin;
    }
  const IteratorType & End() const
    {
    return this->m_End;
    }

private:
  friend class ThreadedIteratorRangePartitioner< IteratorType >;
  IteratorType m_Begin;
  IteratorType m_End;
};

template< typename TIterator >
class ITK_TEMPLATE_EXPORT ThreadedIteratorRangePartitioner
  : public ThreadedDomainPartitioner< ThreadedIteratorRangePartitionerDomain< TIterator > >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ThreadedIteratorRangePartitioner);

  using Self = ThreadedIteratorRangePartitioner;
  using Superclass = ThreadedDomainPartitioner< ThreadedIteratorRangePartitionerDomain< TIterator > >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(ThreadedIteratorRangePartitioner, ThreadedDomainPartitioner);

  using DomainType = typename Superclass::DomainType;

  using IteratorType = TIterator;

  ThreadIdType PartitionDomain(const ThreadIdType threadId,
                           const ThreadIdType requestedTotal,
                           const DomainType& completeDomain,
                           DomainType& subDomain) const override;

protected:
  ThreadedIteratorRangePartitioner() = default;
  ~ThreadedIteratorRangePartitioner() override = default;
};

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkThreadedIteratorRangePartitioner.hxx"
#endif

#endif