.. _mpi_file_sync:


MPI_File_sync
=============

.. include_body

:ref:`MPI_File_sync` |mdash| Makes semantics consistent for data-access
operations (collective).


SYNTAX
------



C Syntax
^^^^^^^^

.. code-block:: c

   #include <mpi.h>

   int MPI_File_sync(MPI_File fh)


Fortran Syntax
^^^^^^^^^^^^^^

.. code-block:: fortran

   USE MPI
   ! or the older form: INCLUDE 'mpif.h'
   MPI_FILE_SYNC(FH, IERROR)
   	INTEGER	FH, IERROR


Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^

.. code-block:: fortran

   USE mpi_f08
   MPI_File_sync(fh, ierror)
   	TYPE(MPI_File), INTENT(IN) :: fh
   	INTEGER, OPTIONAL, INTENT(OUT) :: ierror


INPUT PARAMETER
---------------
* ``fh``: File handle (handle).

OUTPUT PARAMETER
----------------
* ``ierror``: Fortran only: Error status (integer).

DESCRIPTION
-----------

Calling :ref:`MPI_File_sync` with *fh* causes all previous writes to *fh* by
the calling process to be written to permanent storage. If other
processes have made updates to permanent storage, then all such updates
become visible to subsequent reads of *fh* by the calling process.

:ref:`MPI_File_sync` is a collective operation. The user is responsible for
ensuring that all nonblocking requests on *fh* have been completed
before calling :ref:`MPI_File_sync`. Otherwise, the call to :ref:`MPI_File_sync` is
erroneous.


ERRORS
------

.. include:: ./ERRORS.rst