codi::ChunkBase Struct Reference

A chunk stores a contiguous block of data in CoDiPack. More...

#include <chunk.hpp>

Inheritance diagram for codi::ChunkBase:

Public Member Functions
	ChunkBase (size_t const &size)
	Constructor.
virtual	~ChunkBase ()
	Destructor.
Interface: Entry management
template<typename... Data>
void	pushData (Data &&... dataEntries)
	provided.
template<typename... Pointers>
void	dataPointer (size_t const &index, Pointers *&... pointers)
virtual void	erase (size_t const &start, size_t const &end)=0
	Erase data items start, ..., end - 1.
Interface: Data IO
virtual void	allocateData ()=0
	Allocated the data if it was deallocated before.
virtual void	deleteData ()=0
	Delete the allocated data.
virtual void	readData (FileIo &handle)=0
	Read data from the FileIo handle.
virtual void	writeData (FileIo &handle) const =0
	Write data to the FileIo handle.
Interface: Misc
void	swap (ImplProxy &other)
	Swap data with other chunk of the same type.
Common functionality
size_t	getSize () const
	Get the allocated size.
size_t	getUnusedSize () const
	Number of unused data items.
size_t	getUsedSize () const
	Number of used data items.
void	reset ()
	Sets the number of used items to zero.
void	resize (size_t newSize)
	Resize the allocated data. Stored data is lost. Used size is set to zero.
void	setUsedSize (size_t const &usage)
	Set the used size.

Static Public Attributes
Interface: Types & constants
static size_t constexpr	EntrySize = false
	Total size of all data in one entry.

Protected Member Functions
void	swap (ChunkBase &other)
	Swap the entries of this base class.

Protected Attributes
size_t	size
	Maximum size of arrays.
size_t	usedSize
	Currently used size.

Detailed Description

A chunk stores a contiguous block of data in CoDiPack.

See DataInterface for a more general description of the data layout in CoDiPack.

The chunk classes implement a structure of arrays approach for the data management. Each item can have multiple entries where each entry is stored in its own array.

E.g., if each item consists two entries (double, int), then we have two arrays:

                  item 0 | item 1 | item 2 | etc.
array1 (double) :  0.1   |   3.14 |  2.17  | ...
array2 (int)    :   1    |   10   |   2    | ...

ChunkBase serves both as a base class and as an interface. The base class defines functions for getting and setting the number of used items. The interface defines the functions for the data access.

• Entry management:
  • pushData(): Add one data item. One argument per entry.
  • dataPointer(): Get pointers to the data. One argument per entry.
  • erase(): Erase a range of data items.
• Data IO:
  • allocateData() / deleteData(): Allocate / delete the data arrays.
  • readData() / writeData(): Read / write the data in the arrays to the IO object.

Member Function Documentation

allocateData()

virtual void codi::ChunkBase::allocateData ( )

inlinepure virtual

Allocated the data if it was deallocated before.

Implemented in codi::Chunk1< Data1 >, codi::Chunk2< Data1, Data2 >, codi::Chunk3< Data1, Data2, Data3 >, and codi::Chunk4< Data1, Data2, Data3, Data4 >.

dataPointer()

template<typename... Pointers>

void codi::ChunkBase::dataPointer ( size_t const & index, Pointers *&... pointers )

inline

Extract pointer to requested position. For each entry one argument has to be provided.

deleteData()

virtual void codi::ChunkBase::deleteData ( )

inlinepure virtual

Delete the allocated data.

Implemented in codi::Chunk1< Data1 >, codi::Chunk2< Data1, Data2 >, codi::Chunk3< Data1, Data2, Data3 >, and codi::Chunk4< Data1, Data2, Data3, Data4 >.

erase()

virtual void codi::ChunkBase::erase ( size_t const & start, size_t const & end )

pure virtual

Erase data items start, ..., end - 1.

Implemented in codi::Chunk1< Data1 >, codi::Chunk2< Data1, Data2 >, codi::Chunk3< Data1, Data2, Data3 >, and codi::Chunk4< Data1, Data2, Data3, Data4 >.

pushData()

template<typename... Data>

void codi::ChunkBase::pushData ( Data &&... dataEntries )

inline

provided.

Add one data item. For each entry one argument has to be

readData()

virtual void codi::ChunkBase::readData ( FileIo & handle )

inlinepure virtual

Read data from the FileIo handle.

Implemented in codi::Chunk1< Data1 >, codi::Chunk2< Data1, Data2 >, codi::Chunk3< Data1, Data2, Data3 >, and codi::Chunk4< Data1, Data2, Data3, Data4 >.

writeData()

virtual void codi::ChunkBase::writeData ( FileIo & handle ) const

inlinepure virtual

Write data to the FileIo handle.

Implemented in codi::Chunk1< Data1 >, codi::Chunk2< Data1, Data2 >, codi::Chunk3< Data1, Data2, Data3 >, and codi::Chunk4< Data1, Data2, Data3, Data4 >.

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

• include/codi/tapes/data/chunk.hpp