ESMF_GridCompSetVMShObj Subroutine

  recursive subroutine ESMF_GridCompSetVMShObj(gridcomp, userRoutine, &
    keywordEnforcer, sharedObj, userRoutineFound, userRc, rc)
!
! !ARGUMENTS:
    type(ESMF_GridComp), intent(inout)         :: gridcomp
    character(len=*),    intent(in)            :: userRoutine
type(ESMF_KeywordEnforcer), optional:: keywordEnforcer ! must use keywords below
    character(len=*),    intent(in),  optional :: sharedObj
    logical,             intent(out), optional :: userRoutineFound
    integer,             intent(out), optional :: userRc
    integer,             intent(out), optional :: rc
!
! !STATUS:
! \begin{itemize}
! \item\apiStatusCompatibleVersion{5.2.0r}
! \item\apiStatusModifiedSinceVersion{5.2.0r}
! \begin{description}
! \item[8.4.0] Added argument {\tt userRoutineFound}.
!              The new argument provides a way to test availability without
!              causing error conditions.
! \end{description}
! \end{itemize}
!
! !DESCRIPTION:
! Optionally call into user provided {\tt userRoutine} which is responsible
! for setting Component's VM properties. The named
! {\tt userRoutine} must exist in the executable, or in the shared object
! specified by {\tt sharedObj}. In the latter case all of the platform
! specific details about dynamic linking and loading apply.
!
! The arguments are:
! \begin{description}
! \item[gridcomp]
!   Gridded Component.
! \item[userRoutine]
!   Routine to be called, specified as a character string.
!   The Component writer must supply a subroutine with the exact interface
!   shown for {\tt userRoutine} below. Arguments must not be declared
!   as optional, and the types, intent and order must match.
!   Prior to Fortran-2008, the subroutine must be either a module scope procedure,
!   or an external procedure that has a matching interface block specified for it.
!   An internal procedure which is contained within another procedure must not be used.
!   From Fortran-2008 onwards, an internal procedure contained within either a main program
!   or a module procedure may be used.  If the internal procedure is contained within a
!   module procedure, it is subject to initialization requirements.  See: \ref{sec:AppDriverIntProc}
!
!   !INTERFACE:
!     interface
!       subroutine userRoutine(gridcomp, rc)
!         type(ESMF_GridComp)  :: gridcomp    ! must not be optional
!         integer, intent(out) :: rc          ! must not be optional
!       end subroutine
!     end interface
!
!   !DESCRIPTION:
!   The subroutine, when called by the framework, is expected to use any of the
!   {\tt ESMF\_GridCompSetVMxxx()} methods to set the properties of the VM
!   associated with the Gridded Component.
! \item[{[sharedObj]}]
!   Name of shared object that contains {\tt userRoutine}. If the
!   {\tt sharedObj} argument is not provided the executable itself will be
!   searched for {\tt userRoutine}.
! \item[{[userRoutineFound]}]
!   Report back whether the specified {\tt userRoutine} was found and executed,
!   or was not available. If this argument is present, not finding the
!   {\tt userRoutine} will not result in returning an error in {\tt rc}.
!   The default is to return an error if the {\tt userRoutine} cannot be found.
! \item[{[userRc]}]
!   Return code set by {\tt userRoutine} before returning.
! \item[{[rc]}]
!   Return code; equals {\tt ESMF\_SUCCESS} if there are no errors.
! \end{description}
!
!EOP
!------------------------------------------------------------------------------
    integer :: localrc                       ! local error status
    integer :: localUserRc
    character(len=0) :: emptyString
    type(ESMF_Logical)  :: userRoutineFoundHelp
    logical             :: userRoutineFoundHelpHelp

    ! initialize return code; assume routine not implemented
    if (present(rc)) rc = ESMF_RC_NOT_IMPL
    localrc = ESMF_RC_NOT_IMPL

    ESMF_INIT_CHECK_DEEP(ESMF_GridCompGetInit, gridcomp, rc)

    if (present(sharedObj)) then
      call c_ESMC_SetVMShObj(gridcomp, userRoutine, sharedObj, &
        userRoutineFoundHelp, localUserRc, localrc)
    else
      call c_ESMC_SetVMShObj(gridcomp, userRoutine, emptyString, &
        userRoutineFoundHelp, localUserRc, localrc)
    endif
    if (ESMF_LogFoundError(localrc, &
      ESMF_ERR_PASSTHRU, &
      ESMF_CONTEXT, rcToReturn=rc)) return

    ! translate ESMF_Logical -> logical
    userRoutineFoundHelpHelp = userRoutineFoundHelp

    ! report back
    if (present(userRoutineFound)) userRoutineFound = userRoutineFoundHelpHelp

    ! pass back userRc
    if (present(userRc)) userRc = localUserRc

    ! return successfully
    if (present(rc)) rc = ESMF_SUCCESS
  end subroutine ESMF_GridCompSetVMShObj