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.. _mpi_recv_init:
MPI_Recv_init
=============
.. include_body
:ref:`MPI_Recv_init` |mdash| Builds a handle for a receive.
SYNTAX
------
C Syntax
^^^^^^^^
.. code-block:: c
#include <mpi.h>
int MPI_Recv_init(void *buf, int count, MPI_Datatype datatype,
int source, int tag, MPI_Comm comm, MPI_Request *request)
Fortran Syntax
^^^^^^^^^^^^^^
.. code-block:: fortran
USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_RECV_INIT(BUF, COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST,
IERROR)
<type> BUF(*)
INTEGER COUNT, DATATYPE, SOURCE, TAG, COMM, REQUEST, IERROR
Fortran 2008 Syntax
^^^^^^^^^^^^^^^^^^^
.. code-block:: fortran
USE mpi_f08
MPI_Recv_init(buf, count, datatype, source, tag, comm, request, ierror)
TYPE(*), DIMENSION(..), ASYNCHRONOUS :: buf
INTEGER, INTENT(IN) :: count, source, tag
TYPE(MPI_Datatype), INTENT(IN) :: datatype
TYPE(MPI_Comm), INTENT(IN) :: comm
TYPE(MPI_Request), INTENT(OUT) :: request
INTEGER, OPTIONAL, INTENT(OUT) :: ierror
INPUT PARAMETERS
----------------
* ``count``: Maximum number of elements to receive (integer).
* ``datatype``: Type of each entry (handle).
* ``source``: Rank of source (integer).
* ``tag``: Message tag (integer).
* ``comm``: Communicator (handle).
INPUT/OUTPUT PARAMETER
----------------------
* ``buf``: Initial address of receive buffer (choice).
OUTPUT PARAMETERS
-----------------
* ``request``: Communication request (handle).
* ``ierror``: Fortran only: Error status (integer).
DESCRIPTION
-----------
Creates a persistent communication request for a receive operation. The
argument *buf* is marked as OUT because the user gives permission to
write on the receive buffer by passing the argument to :ref:`MPI_Recv_init`.
A persistent communication request is inactive after it is created |mdash| no
active communication is attached to the request.
A communication (send or receive) that uses a persistent request is
initiated by the function :ref:`MPI_Start` or :ref:`MPI_Startall`.
ERRORS
------
.. include:: ./ERRORS.rst
.. seealso::
* :ref:`MPI_Bsend_init`
* :ref:`MPI_Rsend_init`
* :ref:`MPI_Send_init`
* MPI_Sssend_init
* :ref:`MPI_Start`
* :ref:`MPI_Startall`
* :ref:`MPI_Request_free`
|
