MPIStart(3OpenMPI) MPIStart(3OpenMPI)

NAME
       MMPPIISSttaarrtt  -  Initiates a communication using a persistent request han-
       dle.


SSYYNNTTAAXX
CC SSyynnttaaxx
       #include 
       int MPIStart(MPIRequest *request)


FFoorrttrraann SSyynnttaaxx
       INCLUDE 'mpif.h'
       MPISTART(REQUEST, IERROR)
            INTEGER   REQUEST, IERROR


CC++++ SSyynnttaaxx
       #include 
       void Prequest::Start()


IINNPPUUTT PPAARRAAMMEETTEERR
       request   Communication request (handle).


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


DESCRIPTION
       A communication (send or receive) that uses  a  persistent  request  is
       initiated by the function MPIStart.

       The  argument,  request,  is a handle returned by one of the persistent
       communication-request    initialization    functions    (MPISendinit,
       MPIBsendinit,   MPISsendinit,  MPIRsendinit,  MPIRecvinit). The
       associated request should be inactive and becomes active once the  call
       is made.

       If  the  request is for a send with ready mode, then a matching receive
       should be posted before the call is made. From the  time  the  call  is
       made  until  after  the  operation  completes, the communication buffer
       should not be accessed.

       The call is local, with semantics similar to the nonblocking communica-
       tion  operations  (see  Section 3.7 in the MPI-1 Standard, "Nonblocking
       Communication.") That is, a call to MPIStart with a request created by
       MPISendinit  starts  a  communication in the same manner as a call to
       MPIIsend; a call to MPIStart with a request created by MPIBsendinit
       starts  a communication in the same manner as a call to MPIIbsend; and
       so on.


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
       MPIBsendinit
       MPIRsendinit
       MPISendinit
       MPISssendinit
       MPIRecvinit
       MPIStartall





Open MPI 1.2                    September 2006             MPIStart(3OpenMPI)