Man Linux: Main Page and Category List


       MPI_Grequest_complete    -   Reports  that  a  generalized  request  is


C Syntax

       #include <mpi.h>
       int MPI_Grequest_complete(MPI_Request request)

Fortran Syntax

       INCLUDE ’mpif.h’

C++ Syntax

       #include <mpi.h>
       void MPI::Grequest::Complete()


       request   Generalized request (handle).


       IERROR    Fortran only: Error status (integer).


       MPI_Grequest_complete informs MPI that the  operations  represented  by
       the   generalized   request   request   are   complete.   A   call   to
       MPI_Wait(request, status) will return, and a call to  MPI_Test(request,
       flag,   status)   will   return   flag=true   only   after  a  call  to
       MPI_Grequest_complete has declared that these operations are  complete.

       MPI  imposes  no  restrictions  on  the  code  executed by the callback
       functions. However, new nonblocking operations  should  be  defined  so
       that  the  general  semantic  rules  about  MPI calls such as MPI_Test,
       MPI_Request_free, or MPI_Cancel still  hold.  For  example,  all  these
       calls are supposed to be local and nonblocking. Therefore, the callback
       functions query_fn, free_fn, or cancel_fn should  invoke  blocking  MPI
       communication  calls  only  if the context is such that these calls are
       guaranteed to return in finite time. Once MPI_Cancel has been  invoked,
       the  canceled  operation  should complete in finite time, regardless of
       the state of  other  processes  (the  operation  has  acquired  "local"
       semantics).  It should either succeed or fail without side-effects. The
       user  should  guarantee  these  same  properties  for   newly   defined


       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.