AlignedVector< T > Class Template Reference

#include <deal.II/base/aligned_vector.h>

Inheritance diagram for AlignedVector< T >:

Public Types
using	value_type = T

Public Member Functions
	AlignedVector ()
	AlignedVector (const size_type size, const T &init=T())
	~AlignedVector ()
	AlignedVector (const AlignedVector< T > &vec)
	AlignedVector (AlignedVector< T > &&vec) noexcept
AlignedVector &	operator= (const AlignedVector< T > &vec)
AlignedVector &	operator= (AlignedVector< T > &&vec) noexcept
void	resize_fast (const size_type size)
void	resize (const size_type size_in)
void	resize (const size_type size_in, const T &init)
void	reserve (const size_type size_alloc)
void	clear ()
void	push_back (const T in_data)
reference	back ()
const_reference	back () const
template<typename ForwardIterator >
void	insert_back (ForwardIterator begin, ForwardIterator end)
void	fill ()
void	fill (const T &element)
void	swap (AlignedVector< T > &vec)
bool	empty () const
size_type	size () const
size_type	capacity () const
reference	operator[] (const size_type index)
const_reference	operator[] (const size_type index) const
pointer	data ()
const_pointer	data () const
iterator	begin ()
iterator	end ()
const_iterator	begin () const
const_iterator	end () const
size_type	memory_consumption () const
template<class Archive >
void	save (Archive &ar, const unsigned int version) const
template<class Archive >
void	load (Archive &ar, const unsigned int version)

Private Attributes
T *	data_begin
T *	data_end
T *	allocated_end

Related Functions
(Note that these are not member functions.)
template<class T >
bool	operator== (const AlignedVector< T > &lhs, const AlignedVector< T > &rhs)
template<class T >
bool	operator!= (const AlignedVector< T > &lhs, const AlignedVector< T > &rhs)

Detailed Description

template<class T>
class AlignedVector< T >

This is a replacement class for std::vector to be used in combination with VectorizedArray and derived data types. It allocates memory aligned to addresses of a vectorized data type (in order to avoid segmentation faults when a variable of type VectorizedArray which the compiler assumes to be aligned to certain memory addresses does not actually follow these rules). This could also be achieved by proving std::vector with a user-defined allocator. On the other hand, writing an own small vector class lets us implement parallel copy and move operations with TBB, insert deal.II-style assertions, and cut some unnecessary functionality. Note that this vector is a bit more memory-consuming than std::vector because of alignment, so it is recommended to only use this vector on long vectors.

author Katharina Kormann, Martin Kronbichler, 2011

Definition at line 61 of file aligned_vector.h.

Member Typedef Documentation

value_type

template<class T>

using AlignedVector< T >::value_type = T

Declare standard types used in all containers. These types parallel those in the C++ standard libraries vector<...> class.

Definition at line 68 of file aligned_vector.h.

Constructor & Destructor Documentation

AlignedVector() [1/4]

template<class T>

AlignedVector< T >::AlignedVector

(

)

Empty constructor. Sets the vector size to zero.

AlignedVector() [2/4]

template<class T>

AlignedVector< T >::AlignedVector	(	const size_type	size,
		const T &	init = T()
	)

Set the vector size to the given size and initializes all elements with T().

Note

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

~AlignedVector()

template<class T>

AlignedVector< T >::~AlignedVector

(

)

Destructor.

AlignedVector() [3/4]

template<class T>

AlignedVector< T >::AlignedVector

(

const AlignedVector< T > &

vec

)

Copy constructor.

Note

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

AlignedVector() [4/4]

template<class T>

AlignedVector< T >::AlignedVector ( AlignedVector< T > &&  vec )

noexcept

Move constructor. Create a new aligned vector by stealing the contents of vec.

Member Function Documentation

operator=() [1/2]

template<class T>

AlignedVector& AlignedVector< T >::operator=

(

const AlignedVector< T > &

vec

)

Assignment to the input vector vec.

Note

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

operator=() [2/2]

template<class T>

AlignedVector& AlignedVector< T >::operator= ( AlignedVector< T > &&  vec )

noexcept

Move assignment operator.

resize_fast()

template<class T>

void AlignedVector< T >::resize_fast

(

const size_type

size

)

Change the size of the vector. It keeps old elements previously available but does not initialize the newly allocated memory, leaving it in an undefined state.

Note

This method can only be invoked for classes T that define a default constructor, T(). Otherwise, compilation will fail.

resize() [1/2]

template<class T>

void AlignedVector< T >::resize

(

const size_type

size_in

)

Change the size of the vector. It keeps old elements previously available, and initializes each newly added element to a default-constructed object of type T.

If the new vector size is shorter than the old one, the memory is not immediately released unless the new size is zero; however, the size of the current object is of course set to the requested value.

Note

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

resize() [2/2]

template<class T>

void AlignedVector< T >::resize	(	const size_type	size_in,
		const T &	init
	)

Change the size of the vector. It keeps old elements previously available, and initializes each newly added element with the provided initializer.

If the new vector size is shorter than the old one, the memory is not immediately released unless the new size is zero; however, the size of the current object is of course set to the requested value.

Note

This method can only be invoked for classes that define the copy assignment operator. Otherwise, compilation will fail.

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

reserve()

template<class T>

void AlignedVector< T >::reserve

(

const size_type

size_alloc

)

Reserve memory space for size elements. If the argument size is set to zero, all previously allocated memory is released.

In order to avoid too frequent reallocation (which involves copy of the data), this function doubles the amount of memory occupied when the given size is larger than the previously allocated size.

clear()

template<class T>

void AlignedVector< T >::clear

(

)

Releases all previously allocated memory and leaves the vector in a state equivalent to the state after the default constructor has been called.

push_back()

template<class T>

void AlignedVector< T >::push_back

(

const T

in_data

)

Inserts an element at the end of the vector, increasing the vector size by one. Note that the allocated size will double whenever the previous space is not enough to hold the new element.

back() [1/2]

template<class T>

reference AlignedVector< T >::back

(

)

Return the last element of the vector (read and write access).

back() [2/2]

template<class T>

const_reference AlignedVector< T >::back

(

)

const

Return the last element of the vector (read-only access).

insert_back()

template<class T>

template<typename ForwardIterator >

void AlignedVector< T >::insert_back	(	ForwardIterator	begin,
		ForwardIterator	end
	)

Inserts several elements at the end of the vector given by a range of elements.

fill() [1/2]

template<class T>

void AlignedVector< T >::fill

(

)

Fills the vector with size() copies of a default constructed object.

Note

Unlike the other fill() function, this method can also be invoked for classes that do not define a copy assignment operator.

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

fill() [2/2]

template<class T>

void AlignedVector< T >::fill

(

const T &

element

)

Fills the vector with size() copies of the given input.

Note

This method can only be invoked for classes that define the copy assignment operator. Otherwise, compilation will fail.

If deal.II is configured with threads, this operation will run multi-threaded by splitting the work into smaller chunks (assuming there is enough work to make this worthwhile).

swap()

template<class T>

void AlignedVector< T >::swap

(

AlignedVector< T > &

vec

)

Swaps the given vector with the calling vector.

empty()

template<class T>

bool AlignedVector< T >::empty

(

)

const

Return whether the vector is empty, i.e., its size is zero.

size()

template<class T>

size_type AlignedVector< T >::size

(

)

const

Return the size of the vector.

capacity()

template<class T>

size_type AlignedVector< T >::capacity

(

)

const

Return the capacity of the vector, i.e., the size this vector can hold without reallocation. Note that capacity() >= size().

operator[]() [1/2]

template<class T>

reference AlignedVector< T >::operator[]

(

const size_type

index

)

Read-write access to entry index in the vector.

operator[]() [2/2]

template<class T>

const_reference AlignedVector< T >::operator[]

(

const size_type

index

)

const

Read-only access to entry index in the vector.

data() [1/2]

template<class T>

pointer AlignedVector< T >::data

(

)

Return a pointer to the underlying data buffer.

data() [2/2]

template<class T>

const_pointer AlignedVector< T >::data

(

)

const

Return a const pointer to the underlying data buffer.

begin() [1/2]

template<class T>

iterator AlignedVector< T >::begin

(

)

Return a read and write pointer to the beginning of the data array.

end() [1/2]

template<class T>

iterator AlignedVector< T >::end

(

)

Return a read and write pointer to the end of the data array.

begin() [2/2]

template<class T>

const_iterator AlignedVector< T >::begin

(

)

const

Return a read-only pointer to the beginning of the data array.

end() [2/2]

template<class T>

const_iterator AlignedVector< T >::end

(

)

const

Return a read-only pointer to the end of the data array.

memory_consumption()

template<class T>

size_type AlignedVector< T >::memory_consumption

(

)

const

Return the memory consumption of the allocated memory in this class. If the underlying type T allocates memory by itself, this memory is not counted.

save()

template<class T>

template<class Archive >

void AlignedVector< T >::save	(	Archive &	ar,
		const unsigned int	version
	)		const

Write the data of this object to a stream for the purpose of serialization.

load()

template<class T>

template<class Archive >

void AlignedVector< T >::load	(	Archive &	ar,
		const unsigned int	version
	)

Read the data of this object from a stream for the purpose of serialization.

Friends And Related Function Documentation

operator==()

template<class T >

bool operator== ( const AlignedVector< T > &  lhs, const AlignedVector< T > &  rhs  )

related

Relational operator == for AlignedVector

Definition at line 1158 of file aligned_vector.h.

operator!=()

template<class T >

bool operator!= ( const AlignedVector< T > &  lhs, const AlignedVector< T > &  rhs  )

related

Relational operator != for AlignedVector

Definition at line 1180 of file aligned_vector.h.

Member Data Documentation

data_begin

template<class T>

T* AlignedVector< T >::data_begin

private

Pointer to actual class data.

Definition at line 336 of file aligned_vector.h.

data_end

template<class T>

T* AlignedVector< T >::data_end

private

Pointer to one past the last valid value.

Definition at line 341 of file aligned_vector.h.

allocated_end

template<class T>

T* AlignedVector< T >::allocated_end

private

Pointer to the end of the allocated memory.

Definition at line 346 of file aligned_vector.h.

---

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

• deal.II/base/aligned_vector.h