MPI_Recv_init - Builds a handle for a receive.

NAME SYNTAX C Syntax Fortran Syntax Fortran 2008 Syntax INPUT PARAMETERS INPUT/OUTPUT PARAMETER OUTPUT PARAMETERS DESCRIPTION ERRORS SEE ALSO

NAME

MPI_Recv_init − Builds a handle for a receive.

C Syntax

#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

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

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).

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 MPI_Recv_init.

A persistent communication request is inactive after it is created -- no active communication is attached to the request.

A communication (send or receive) that uses a persistent request is initiated by the function MPI_Start or MPI_Startall.

ERRORS

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI::Exception object.

Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.