MPI_SEND_INIT, MPI_Send_init

Purpose

Creates a persistent standard mode send request.

C synopsis

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

C++ synopsis

#include mpi.h
MPI::Prequest MPI::Comm::Send_init(const void* buf, int count,
                                   const MPI::Datatype& datatype,
                                   int dest, int tag) const;

FORTRAN synopsis

include 'mpif.h' or use mpi
MPI_SEND_INIT(CHOICE BUF,INTEGER COUNT,INTEGER DATATYPE,INTEGER DEST,
      INTEGER TAG,INTEGER COMM,INTEGER REQUEST,INTEGER IERROR)

Description

This subroutine creates a persistent communication request for a standard
mode send operation, and binds to it all arguments of a send operation. A
communication started with MPI_SEND_INIT is completed by a call to one of
the MPI wait or test operations. MPI_START or MPI_STARTALL is used to
activate the send.

Parameters

buf
     is the initial address of the send buffer (choice) (IN)
count
     is the number of elements to be sent (integer) (IN)
datatype
     is the type of each element (handle) (IN)
dest
     is the rank of the destination task (integer) (IN)
tag
     is the message tag (positive integer) (IN)
comm
     is the communicator (handle) (IN)
request
     is the communication request (handle) (OUT)
IERROR
     is the FORTRAN return code. It is always the last argument.

Notes

See MPI_SEND for more information.

Errors

Invalid count
     count < 0

Invalid datatype

Type not committed

Invalid destination
     dest < 0 or dest > = groupsize

Invalid tag
     tag < 0

Invalid comm

MPI not initialized

MPI already finalized

Related information

     MPI_ISEND
     MPI_START