buffers Struct Reference

The buffers type provides an interface for dynamic amounts of data. More...

Classes
struct	ragged
	Utility to transfer the contents of ragged rows via buffers. More...

Public Types
using	Start
	Alias Start is used to provide accessor to the sending buffers.
using	Transfer
	Alias Transfer is used to provide accessor to the receiving buffers.
Public Types inherited from specialization< detail::buffers_category, buffers >
using	accessor
	The topology accessor to use as a parameter to receive a slot.
using	base
	The core topology base type, which can provide specialization utilities.
using	coloring
	The coloring type.
using	slot
	The slot type for declaring topology instances.
Public Types inherited from specialization_base
template<auto V, class T >
using	from
	A connectivity specification.
template<auto V, class T >
using	entity
	A special-entities specification.
template<auto... V>
using	has
	A list of enumerators for which to store data.
template<auto... V>
using	to
	A list of index spaces to use as output.
template<class... TT>
using	list
	Container.
using	index_space
	The index space type.
using	index_spaces
	The set of index spaces, wrapped in has.
template<class B >
using	interface
	The topology interface type.

Additional Inherited Members
Public Member Functions inherited from specialization_base
	specialization_base ()=delete
	Specializations cannot be constructed.
Static Public Member Functions inherited from specialization< detail::buffers_category, buffers >
static constexpr auto	default_space ()
	The default index space to use when one is optional.
static void	initialize (slot &s, coloring const &)
	Specialization-specific initialization.
Static Public Attributes inherited from specialization< detail::buffers_category, buffers >
static constexpr PrivilegeCount	privilege_count
	The number of privileges to use for an accessor.

Detailed Description

The buffers type provides an interface for dynamic amounts of data.

This subtopology type also provides conveniences for transfer tasks.

Member Typedef Documentation

Start

using Start

Alias Start is used to provide accessor to the sending buffers.

It should be part of the signature of the two function objects (F, G) needed by the "xfer" method of underlying buffers_category.

Transfer

using Transfer

Alias Transfer is used to provide accessor to the receiving buffers.

It should be part of the signature of the two function objects (F, G) needed by the "xfer" method of underlying buffers_category. Since copy_plan supports only copies between parts of the same logical region, we can't use WRITE_DISCARD for the send buffer. We therefore use rw for it so that transfer functions can use it to resume large jobs.