17.2.306. MPI_Rsend_init

MPI_Rsend_init - Builds a handle for a ready send.

17.2.306.1. SYNTAX

17.2.306.1.1. C Syntax

#include <mpi.h>

int MPI_Rsend_init(const void *buf, int count, MPI_Datatype datatype,
     int dest, int tag, MPI_Comm comm, MPI_Request *request)

17.2.306.1.2. Fortran Syntax

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

17.2.306.1.3. Fortran 2008 Syntax

USE mpi_f08
MPI_Rsend_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

17.2.306.2. INPUT PARAMETERS

  • buf: Initial address of send buffer (choice).

  • count: Number of elements sent (integer).

  • datatype: Type of each element (handle).

  • dest: Rank of destination (integer).

  • tag: Message tag (integer).

  • comm: Communicator (handle).

17.2.306.3. OUTPUT PARAMETERS

  • request: Communication request (handle).

  • IERROR: Fortran only: Error status (integer).

17.2.306.4. DESCRIPTION

Creates a persistent communication object for a ready 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.

17.2.306.5. ERRORS

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument.

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.