TTN::DoubleBuffer_t Class Reference

The temporary buffer for internal computations which is split into two halves. More...

#include <TargetBuffer_t.h>

Collaboration diagram for TTN::DoubleBuffer_t:

Public Member Functions
void	clear (unsigned int max_buffer)
Buffer_t	operator[] (unsigned int fold_idx)
std::vector< double >	releaseData (std::vector< double >::size_type final_size, unsigned int fold_idx)
	move the final result to its destination

Private Member Functions
void	resize (unsigned int max_buffer)

Private Attributes
std::vector< double >	m_buffer

Detailed Description

The temporary buffer for internal computations which is split into two halves.

The buffer can be used in iterative computations which uses in each iteration the output of the previous one. For such computations, the input is stored in one half and the output in the other half, and the two buffers are swapped after each iteration. Finally the output half of the last iteration is copied to the beginning of the buffer and the buffer is shrunken to its final size.

Definition at line 163 of file TargetBuffer_t.h.

Member Function Documentation

clear()

void TTN::DoubleBuffer_t::clear ( unsigned int max_buffer )

inline

Definition at line 166 of file TargetBuffer_t.h.

                                        {
      resize(max_buffer);
      std::fill(m_buffer.begin(),m_buffer.end(),double{});
    }

operator[]()

Buffer_t TTN::DoubleBuffer_t::operator[] ( unsigned int fold_idx )

inline

Definition at line 171 of file TargetBuffer_t.h.

                                               {
      std::vector<double>::size_type max_idx=m_buffer.size()/2;
      return Buffer_t(&(m_buffer[(fold_idx%2) * max_idx ]), max_idx,m_buffer);
    }

releaseData()

std::vector< double > TTN::DoubleBuffer_t::releaseData ( std::vector< double >::size_type final_size, unsigned int fold_idx )

inline

move the final result to its destination

copy the indicated half to the beginning (if necessary) and shrink the buffer to its final size Finally "move" the internal buffer to its final destination.

Definition at line 181 of file TargetBuffer_t.h.

                                                                                                {
      if (fold_idx%2 !=0 ) {
        std::vector<double>::size_type max_idx=m_buffer.size()/2;
        std::vector<double>::const_iterator first_iter(m_buffer.begin()+max_idx);
        std::vector<double>::const_iterator last_iter(first_iter+max_idx);
        std::copy(first_iter,last_iter, m_buffer.begin());
      }
      m_buffer.resize(final_size);
      return std::move(m_buffer);
    }

resize()

void TTN::DoubleBuffer_t::resize ( unsigned int max_buffer )

inlineprivate

Definition at line 193 of file TargetBuffer_t.h.

                                         {
      max_buffer*=2;
      if (max_buffer>m_buffer.size()) {
        m_buffer.resize(max_buffer,double{});
      }
    }

Member Data Documentation

m_buffer

std::vector<double> TTN::DoubleBuffer_t::m_buffer

private

Definition at line 200 of file TargetBuffer_t.h.

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The documentation for this class was generated from the following file:

• TargetBuffer_t.h