MPIBsend(3OpenMPI) MPIBsend(3OpenMPI)

NAME
       MMPPIIBBsseenndd - Basic send with user-specified buffering.


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


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


CC++++ SSyynnttaaxx
       #include 
       void Comm::Bsend(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 entries 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).


OOUUTTPPUUTT PPAARRAAMMEETTEERR
       IERROR    Fortran only: Error status (integer).


DESCRIPTION
       MPIBsend performs a buffered-mode, blocking send.


NNOOTTEESS
       This  send is provided as a convenience function; it allows the user to
       send messages without worrying about where they are  buffered  (because
       the user must have provided buffer space with MPIBufferattach).

       In deciding how much buffer space to allocate, remember that the buffer
       space is not available for reuse by subsequent  MPIBsends  unless  you
       are certain that the message has been received (not just that it should
       have been received).  For example, this code does not  allocate  enough
       buffer space:

           MPIBufferattach( b, n*sizeof(double) + MPIBSENDOVERHEAD );
           for (i=0; i       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
       MPIBufferattach
       MPIIbsend
       MPIBsendinit




Open MPI 1.2                    September 2006             MPIBsend(3OpenMPI)