Templated class for workspace creation. More...

#include <Teuchos_Workspace.hpp>

Public Member Functions
	Workspace (WorkspaceStore *workspace_store, size_t num_elements, bool call_constructors=true)
	Allocates a num_elements array of temporary objects. More...

	~Workspace ()
	The destructor on the elements will only be called if `call_constructors == true` was passed to the constructor. More...

size_t	size () const
	Return the number of elements in the array. More...

T *	getRawPtr ()
	Return a raw pointer to the beginning of the array or null if unsized. More...

const T *	getRawPtr () const
	Return a raw pointer to the beginning of the array or null if unsized. More...

T &	operator[] (size_t i)
	Non-const zero based element access. More...

const T &	operator[] (size_t i) const
	Const zero based element access. More...

ArrayView< T >	operator() ()
	Return a non-const array view. More...

ArrayView< const T >	operator() () const
	Return a const array view. More...

	operator ArrayView< T > ()
	Return a non-const array view. More...

	operator ArrayView< const T > () const
	Return a const view object. More...

Private Member Functions
	Workspace ()

	Workspace (const RawWorkspace &)

Workspace &	operator= (const RawWorkspace &)

Static Private Member Functions
static void *	operator new (size_t)

static void	operator delete (void *)

Private Attributes
RawWorkspace	raw_workspace_

bool	call_constructors_

Detailed Description

template<class T>
class Teuchos::Workspace< T >

Templated class for workspace creation.

Objects of this type are what should be created by the user instead of RawWorkspace objects since this class will properly initialize memory using placement new and allows typed operator[] access to the array elements. The default constructor, copy constructor and assignment operations are not allowed and objects can not be allocated with new.

It is important to note that the constructors and destructors will only be called if call_constructors=true (the default) is passed to the consructor Workspace(). For build-in types that do not need constructors and destructors called, the client should pass in call_constructors=false . Otherwise we would have to call constructors and destructors on all of the memory and that could considerably slow things down.

With simple built-in data types (i.e. call_constructors=false) the cost of creating and destroying one of these objects should be O(1) independent of how much data is requested. This is true as long as no dynamic memory has to be allocated (this is determined the object workspace_store passed to the constructor Workspace()).

Definition at line 145 of file Teuchos_Workspace.hpp.

Constructor & Destructor Documentation

template<class T >

Teuchos::Workspace< T >::Workspace	(	WorkspaceStore *	workspace_store,
		size_t	num_elements,
		bool	call_constructors = `true`
	)

inline

Allocates a num_elements array of temporary objects.

Parameters

workspace_store	[in] Pointer to the workspace object to get the memory from. This can be `NULL` in which case `new T[]` and `delete []` will be used instead.
num_elements	[in] The number of bytes to allocate.
call_consructors	[in] If `true` then constructors and destructors will be called on the allocated memory.

Preconditions:

num_element >= 0 (throw std::invalid_argument)

Postconditons:




this->size() == num_elements 

[num_elements > 0] this->operator[i], for i = 0,..num_elements-1 points to valid allocated object of type T. 

[num_elements > 0 && call_constructors==true] this->operator[i], for i = 0,..num_elements-1 was allocated as new (&this->operator[i]) T().

When this object is created the workspace_store object will be used to get the raw memory if workspace_store != NULL. If workspace_store == NULL || workspace_store->num_bytes_remaining() < sizeof(T)*num_elements then this memory will have to be dynamically allocated. The memory is default initialized (or uninitialized) using placement new. The constructor will only be called with placement new if call_constructor == ture. Otherwise, the memory will be left uninitlaized. This is okay for integral types like double and int but not okay for class types like std::string etc.

Definition at line 322 of file Teuchos_Workspace.hpp.

template<class T >

Teuchos::Workspace< T >::~Workspace ( )

inline

The destructor on the elements will only be called if call_constructors == true was passed to the constructor.

Definition at line 334 of file Teuchos_Workspace.hpp.

template<class T>

Teuchos::Workspace< T >::Workspace ( )

private

template<class T>

Teuchos::Workspace< T >::Workspace ( const RawWorkspace< T > & )

private

Member Function Documentation

template<class T >

size_t Teuchos::Workspace< T >::size ( ) const

inline

Return the number of elements in the array.

Definition at line 346 of file Teuchos_Workspace.hpp.

template<class T >

T * Teuchos::Workspace< T >::getRawPtr ( )

inline

Return a raw pointer to the beginning of the array or null if unsized.

Definition at line 353 of file Teuchos_Workspace.hpp.

template<class T >

const T * Teuchos::Workspace< T >::getRawPtr ( ) const

inline

Return a raw pointer to the beginning of the array or null if unsized.

Definition at line 360 of file Teuchos_Workspace.hpp.

template<class T >

T & Teuchos::Workspace< T >::operator[] ( size_t i )

inline

Non-const zero based element access.

Preconditions:

0 <= i && i < size() (throw std::invalid_argument)

Definition at line 367 of file Teuchos_Workspace.hpp.

template<class T >

const T & Teuchos::Workspace< T >::operator[] ( size_t i ) const

inline

Const zero based element access.

Preconditions:

0 <= i && i < size() (throw std::invalid_argument)

Definition at line 377 of file Teuchos_Workspace.hpp.

template<class T >

ArrayView< T > Teuchos::Workspace< T >::operator() ( )

inline

Return a non-const array view.

Definition at line 384 of file Teuchos_Workspace.hpp.

template<class T >

ArrayView< const T > Teuchos::Workspace< T >::operator() ( ) const

inline

Return a const array view.

Definition at line 394 of file Teuchos_Workspace.hpp.

template<class T >

Teuchos::Workspace< T >::operator ArrayView< T > ( )

inline

Return a non-const array view.

Definition at line 403 of file Teuchos_Workspace.hpp.

template<class T >

Teuchos::Workspace< T >::operator ArrayView< const T > ( ) const

inline

Return a const view object.

Definition at line 410 of file Teuchos_Workspace.hpp.

template<class T>

Workspace& Teuchos::Workspace< T >::operator= ( const RawWorkspace< T > & )

private

template<class T>

static void* Teuchos::Workspace< T >::operator new ( size_t )

staticprivate

template<class T >

void Teuchos::Workspace< T >::operator delete ( void * )

inlinestaticprivate

Definition at line 428 of file Teuchos_Workspace.hpp.

Member Data Documentation

template<class T>

RawWorkspace Teuchos::Workspace< T >::raw_workspace_

private

Definition at line 214 of file Teuchos_Workspace.hpp.

template<class T>

bool Teuchos::Workspace< T >::call_constructors_

private

Definition at line 215 of file Teuchos_Workspace.hpp.

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

Teuchos_Workspace.hpp

Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Detailed Description

template<class T> class Teuchos::Workspace< T >

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

template<class T>
class Teuchos::Workspace< T >