NAME

MPI_Send - Performs a standard-mode blocking send.

SYNTAX

C Syntax

#include <mpi.h>
int MPI_Send(const void *buf, int count, MPI_Datatype datatype, int dest,
	int tag, MPI_Comm comm)

Fortran Syntax

USE MPI
! or the older form: INCLUDE 'mpif.h'
MPI_SEND(BUF, COUNT, DATATYPE, DEST, TAG, COMM, IERROR)
	<type>	BUF(*)
	INTEGER	COUNT, DATATYPE, DEST, TAG, COMM, IERROR

Fortran 2008 Syntax

USE mpi_f08
MPI_Send(buf, count, datatype, dest, tag, comm, ierror)
	TYPE(*), DIMENSION(..), INTENT(IN) :: buf
	INTEGER, INTENT(IN) :: count, dest, tag
	TYPE(MPI_Datatype), INTENT(IN) :: datatype
	TYPE(MPI_Comm), INTENT(IN) :: comm
	INTEGER, OPTIONAL, INTENT(OUT) :: ierror

C++ Syntax

#include <mpi.h>
void Comm::Send(const void* buf, int count, const Datatype&
	datatype, int dest, int tag) const

INPUT PARAMETERS

buf: Initial address of send buffer (choice).
count: Number of elements send (nonnegative integer).
datatype: Datatype of each send buffer element (handle).
dest: Rank of destination (integer).
tag: Message tag (integer).
comm: Communicator (handle).

OUTPUT PARAMETER

IERROR: Fortran only: Error status (integer).

DESCRIPTION

MPI_Send performs a standard-mode, blocking send.

NOTE

This routine will block until the message is sent to the destination. For an in-depth explanation of the semantics of the standard-mode send, refer to the MPI-1 Standard.

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.