MPI_Send_init(3) man page (version 4.1.8)

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Name

MPI_Send_init - Builds a handle for a standard send.

Syntax

C Syntax

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

Fortran Syntax

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

Fortran 2008 Syntax

USE mpi_f08
MPI_Send_init(buf, count, datatype, dest, tag, comm, request, ierror)
 TYPE(*), DIMENSION(..), INTENT(IN), ASYNCHRONOUS :: buf
 INTEGER, INTENT(IN) :: count, dest, 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

buf

Initial address of send buffer (choice).

count

Number of elements to send (integer).

datatype

Type of each element (handle).

dest

Rank of destination (integer).

tag

Message tag (integer).

comm

Communicator (handle).

Output Parameters

request

Communication request (handle).

IERROR

Fortran only: Error status (integer).

Description

Creates a persistent communication request for a standard mode send operation, and binds to it all the arguments of a send operation.

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.

See Also

MPI_Bsend_init
MPI_Ssend_init
MPI_Rsend_init
MPI_Recv_init
MPI_Start
MPI_Startall

MPI_Request_free

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Table of Contents

• Name
• Syntax
• C Syntax
• Fortran Syntax
• Fortran 2008 Syntax
• Input Parameters
• Output Parameters
• Description
• Errors
• See Also

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Page last modified: 5-Feb-2025
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