.. _file_core_include_HaloExchange.hpp:

File HaloExchange.hpp
=====================

|exhale_lsh| :ref:`Parent directory <dir_core_include>` (``core/include``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS



MPI façade to exchange ghost/halo slabs of ghost‑padded fields. 



.. contents:: Contents
   :local:
   :backlinks: none

Definition (``core/include/HaloExchange.hpp``)
----------------------------------------------


.. toctree::
   :maxdepth: 1

   program_listing_file_core_include_HaloExchange.hpp.rst



Detailed Description
--------------------

Posts six non‑blocking ``None`` into the ghost layers of each field and overlaps communication with interior computation. Interfaces operate on ``Field<T>`` views to avoid extra copies.

.. code-block:: cpp

    exchange_ghosts(rho, mesh, cart_comm); // X±, Y±, Z± slabs


All participating fields must share the same ghost width and extents. 






Includes
--------


- ``Field.hpp`` (:ref:`file_core_include_Field.hpp`)

- ``Mesh.hpp`` (:ref:`file_core_include_Mesh.hpp`)

- ``mpi.h``

- ``vector``






Namespaces
----------


- :ref:`namespace_core`


Functions
---------


- :ref:`exhale_function_namespacecore_1a1d362dc9d6ae191521b5c2aa3b9da585`