A Datatype is a Datatype_template that accepts no argument. More...

Inheritance diagram for PDI::Datatype:

Public Member Functions
	Datatype (const Attributes_map &attributes={})
	Creates a new datatype.

	~Datatype () override

virtual bool	operator== (const Datatype &other) const =0
	Test for equality.

bool	operator!= (const Datatype &other) const
	Test for inequality.

virtual Datatype_sptr	densify () const =0
	Creates a new datatype as the dense copy of this one.

virtual bool	dense () const =0
	Indicate if the datatype is dense or not.

virtual size_t	datasize () const =0
	Computes the data size of a type, excluding potentially unused memory from a sparse type.

virtual size_t	buffersize () const =0
	Computes the data size of a type, including potentially unused memory from a sparse type.

virtual size_t	alignment () const =0
	Returns the required alignment for a type.

virtual bool	simple () const =0
	Tells if data can be copied as bytes (if type is dense) and doesn't need a destroyer.

virtual void *	data_to_dense_copy (void to, const void from) const =0
	Creates a dense deep copy of data.

virtual void *	data_from_dense_copy (void to, const void from) const =0
	Creates a sparse deep copy of dense data.

virtual Datatype_sptr	index (size_t index) const
	Access the type of the element at the provided index.

virtual std::pair< void *, Datatype_sptr >	index (size_t index, void *data) const
	Access the type and value of the element at the provided index.

virtual Datatype_sptr	slice (size_t start_index, size_t end_index) const
	Access the type of the elements slice between the provided indices.

virtual std::pair< void *, Datatype_sptr >	slice (size_t start_index, size_t end_index, void *data) const
	Access the type and value of the elements slice between the provided indices.

virtual Datatype_sptr	member (const char *name) const
	Access the type of the member with the provided name.

virtual std::pair< void *, Datatype_sptr >	member (const char name, void data) const
	Access the type and value of the member with the provided name.

virtual Datatype_sptr	dereference () const
	Access the type referenced by this.

virtual std::pair< void *, Datatype_sptr >	dereference (void *data) const
	Access the type and value referenced by this.

virtual void	destroy_data (void *ptr) const =0
	Delete data whose type is described by the Datatype.

virtual std::string	debug_string () const =0
	Returns the datatype yaml representation as a string.

Public Member Functions inherited from PDI::Datatype_template
	Datatype_template (const Attributes_map &attributes={})
	Creates datatype template with given attributes.

	Datatype_template (PC_tree_t datatype_tree)
	Creates datatype template.

virtual	~Datatype_template ()
	Destroys the template.

virtual Datatype_sptr	evaluate (Context &ctx) const =0
	Creates a new datatype by resolving the value of all metadata references.

Expression	attribute (const std::string &attribute_name) const
	Returns attribute of given name as Expression.

const Attributes_map &	attributes () const
	Returns all attributes as a unordered map.

Additional Inherited Members
Static Public Member Functions inherited from PDI::Datatype_template
static void	load_basic_datatypes (Context &ctx)
	Adds to the context the basic Array, Record, C and Fortran datatypes.

static void	load_user_datatypes (Context &ctx, PC_tree_t types_tree)
	Adds to the context the user defined datatypes.

Protected Attributes inherited from PDI::Datatype_template
Attributes_map	m_attributes

Detailed Description

A Datatype is a Datatype_template that accepts no argument.

It represents the memory layout of data and supports some simple operations on it:

accessing its content
data copy and destruction

Constructor & Destructor Documentation

◆ Datatype()

PDI::Datatype::Datatype ( const Attributes_map & attributes = {} )

Creates a new datatype.

Parameters

[in] attributes attributes of the datatype

◆ ~Datatype()

PDI::Datatype::~Datatype ( )

override

Member Function Documentation

◆ operator==()

virtual bool PDI::Datatype::operator== ( const Datatype & other ) const

pure virtual

Test for equality.

Parameters

other the Datatype to compare

Returns: true if the Datatype's are equal

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ operator!=()

bool PDI::Datatype::operator!= ( const Datatype & other ) const

Test for inequality.

Parameters

other the Datatype to compare

Returns: true if the Datatype's are different

◆ densify()

virtual Datatype_sptr PDI::Datatype::densify ( ) const

pure virtual

Creates a new datatype as the dense copy of this one.

Returns: the type that is produced

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ dense()

virtual bool PDI::Datatype::dense ( ) const

pure virtual

Indicate if the datatype is dense or not.

Returns: whether the datatype is dense

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ datasize()

virtual size_t PDI::Datatype::datasize ( ) const

pure virtual

Computes the data size of a type, excluding potentially unused memory from a sparse type.

Returns: the size in bytes

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ buffersize()

virtual size_t PDI::Datatype::buffersize ( ) const

pure virtual

Computes the data size of a type, including potentially unused memory from a sparse type.

Returns: the size in bytes

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ alignment()

virtual size_t PDI::Datatype::alignment ( ) const

pure virtual

Returns the required alignment for a type.

Returns: the size in bytes

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ simple()

virtual bool PDI::Datatype::simple ( ) const

pure virtual

Tells if data can be copied as bytes (if type is dense) and doesn't need a destroyer.

Returns: true if data has trivial copier and destroyer, false otherwise

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

◆ data_to_dense_copy()

virtual void * PDI::Datatype::data_to_dense_copy	(	void *	to,
		const void *	from
	)		const

pure virtual

Creates a dense deep copy of data.

Parameters

[in]	to	the pointer to the allocated memory to fill (dense data)
[in]	from	the pointer to the copied data (size of buffersize)

Returns: updated ‘to’ pointer

Implemented in PDI::Array_datatype, PDI::Tuple_datatype, PDI::Record_datatype, PDI::Pointer_datatype, and PDI::Scalar_datatype.

◆ data_from_dense_copy()

virtual void * PDI::Datatype::data_from_dense_copy	(	void *	to,
		const void *	from
	)		const

pure virtual

Creates a sparse deep copy of dense data.

Parameters

[in]	to	the pointer to the allocated memory to fill (size of buffersize)
[in]	from	the pointer to the copied data (dense data)

Returns: updated ‘to’ pointer

Implemented in PDI::Array_datatype, PDI::Tuple_datatype, PDI::Record_datatype, PDI::Pointer_datatype, and PDI::Scalar_datatype.

◆ index() [1/2]

virtual Datatype_sptr PDI::Datatype::index ( size_t index ) const

virtual

Access the type of the element at the provided index.

Parameters

index the index where to look

Returns: the Datatype of the indexed sub-element

Reimplemented in PDI::Array_datatype, PDI::Pointer_datatype, and PDI::Tuple_datatype.

◆ index() [2/2]

virtual std::pair< void *, Datatype_sptr > PDI::Datatype::index	(	size_t	index,
		void *	data
	)		const

virtual

Access the type and value of the element at the provided index.

Parameters

index	the index where to look
data	the address of the element to index

Returns: the Datatype and address of the indexed sub-element

Reimplemented in PDI::Array_datatype, PDI::Pointer_datatype, and PDI::Tuple_datatype.

◆ slice() [1/2]

virtual Datatype_sptr PDI::Datatype::slice	(	size_t	start_index,
		size_t	end_index
	)		const

virtual

Access the type of the elements slice between the provided indices.

Parameters

start_index	the index where to start
end_index	the index where to end

Returns: the Datatype of the slice

Reimplemented in PDI::Array_datatype, PDI::Pointer_datatype, and PDI::Tuple_datatype.

◆ slice() [2/2]

virtual std::pair< void *, Datatype_sptr > PDI::Datatype::slice	(	size_t	start_index,
		size_t	end_index,
		void *	data
	)		const

virtual

Access the type and value of the elements slice between the provided indices.

Parameters

start_index	the index where to start
end_index	the index where to end
data	the address of the element to slice

Returns: the Datatype and address of the slice

Reimplemented in PDI::Array_datatype, PDI::Pointer_datatype, and PDI::Tuple_datatype.

◆ member() [1/2]

virtual Datatype_sptr PDI::Datatype::member ( const char * name ) const

virtual

Access the type of the member with the provided name.

Parameters

name	the name of the member to access

Returns: the Datatype of the member

Reimplemented in PDI::Pointer_datatype, and PDI::Record_datatype.

◆ member() [2/2]

virtual std::pair< void *, Datatype_sptr > PDI::Datatype::member	(	const char *	name,
		void *	data
	)		const

virtual

Access the type and value of the member with the provided name.

Parameters

name	the name of the member to access
data	the address of the element whose member to access

Returns: the Datatype and address of the member

Reimplemented in PDI::Pointer_datatype, and PDI::Record_datatype.

◆ dereference() [1/2]

virtual Datatype_sptr PDI::Datatype::dereference ( ) const

virtual

Access the type referenced by this.

Returns: the Datatype referenced

Reimplemented in PDI::Pointer_datatype.

◆ dereference() [2/2]

virtual std::pair< void *, Datatype_sptr > PDI::Datatype::dereference ( void * data ) const

virtual

Access the type and value referenced by this.

Parameters

data	the address of the reference

Returns: the Datatype and address referenced

Reimplemented in PDI::Pointer_datatype.

◆ destroy_data()

virtual void PDI::Datatype::destroy_data ( void * ptr ) const

pure virtual

Delete data whose type is described by the Datatype.

This does not deallocate the buffer used to store the data.

Parameters

[in] ptr to the data to free

Implemented in PDI::Array_datatype, PDI::Record_datatype, PDI::Tuple_datatype, PDI::Pointer_datatype, and PDI::Scalar_datatype.

◆ debug_string()

virtual std::string PDI::Datatype::debug_string ( ) const

pure virtual

Returns the datatype yaml representation as a string.

Returns: the datatype yaml representation as a string

Implemented in PDI::Array_datatype, PDI::Pointer_datatype, PDI::Record_datatype, PDI::Scalar_datatype, and PDI::Tuple_datatype.

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

datatype.h

PDI 1.6.0

the PDI data interface

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ Datatype()

◆ ~Datatype()

Member Function Documentation

◆ operator==()

◆ operator!=()

◆ densify()

◆ dense()

◆ datasize()

◆ buffersize()

◆ alignment()

◆ simple()

◆ data_to_dense_copy()

◆ data_from_dense_copy()

◆ index() [1/2]

◆ index() [2/2]

◆ slice() [1/2]

◆ slice() [2/2]

◆ member() [1/2]

◆ member() [2/2]

◆ dereference() [1/2]

◆ dereference() [2/2]

◆ destroy_data()

◆ debug_string()