MPIIrsend(3OpenMPI) MPIIrsend(3OpenMPI)

NAME
       MMPPIIIIrrsseenndd - Starts a ready-mode nonblocking send.


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPIIrsend(void *buf, int count, MPIDatatype datatype, int dest,
            int tag, MPIComm comm, MPIRequest *request)


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPIIRSEND(BUF, COUNT, DATATYPE, DEST, TAG, COMM, REQUEST, IERROR)
                BUF(*)
            INTEGER   COUNT, DATATYPE, DEST, TAG, COMM, REQUEST, IERROR


CC++++ SSyynnttaaxx
       #include 
       Request Comm::Irsend(const void* buf, int count, const
            Datatype& datatype, int dest, int tag) const


IINNPPUUTT PPAARRAAMMEETTEERRSS
       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).


OOUUTTPPUUTT PPAARRAAMMEETTEERRSS
       request   Communication request (handle).

       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPIIrsend  starts  a  ready-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 to 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.


EERRRROORRSS
       Almost  all MPI routines return an error value; C routines as the value
       of the function and Fortran routines in the last  argument.  C++  func-
       tions  do  not  return  errors.  If the default error handler is set to
       MPI::ERRORSTHROWEXCEPTIONS, 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
       MPICommseterrhandler; the predefined error handler MPIERRORSRETURN
       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
       MPIRsend



Open MPI 1.2                    September 2006            MPIIrsend(3OpenMPI)