MPI_Rsend(3)                       Open MPI                       MPI_Rsend(3)



NAME
       MPI_Rsend - Ready send.


SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Rsend(void *buf, int count, MPI_Datatype datatype, int dest,
            int tag, MPI_Comm comm)


Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_RSEND(BUF, COUNT, DATATYPE, DEST, TAG, COMM, IERROR)
            <type>    BUF(*)
            INTEGER   COUNT, DATATYPE, DEST, TAG, COMM, IERROR


C++ Syntax
       #include <mpi.h>
       void Comm::Rsend(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 in send buffer (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
       A ready send may only be called if the user can guarantee that a
       receive is already posted. It is an error if the receive is not posted
       before the ready send is called.


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.




1.4.1                            Jan 14, 2010                     MPI_Rsend(3)
