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MPI_Issend(3) man page (version 1.2.9)

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NAME

       MPI_Issend - Starts a nonblocking synchronous send.

SYNTAX


C Syntax

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

Fortran Syntax

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

C++ Syntax

       #include <mpi.h>
       Request Comm::Issend(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 (integer).

       datatype  Datatype of each send buffer 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

       Starts a synchronous mode, nonblocking send.

       Nonblocking calls allocate a communication request object and associate
       it with the request handle (the argument request). The request  can  be
       used  later  to  query  the status of the communication or wait for its
       completion.

       A nonblocking send call indicates that the  system  may  start  copying
       data  out  of the send buffer. The sender should not access any part of
       the send buffer after a nonblocking send operation is called, until the
       send completes.

       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_Ssend

Open MPI 1.2                    September 2006            MPI_Issend(3OpenMPI)

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