ESMF_VMAllReduceI8 Subroutine

  subroutine ESMF_VMAllReduceI8(vm, sendData, recvData, count, reduceflag, &
    keywordEnforcer, syncflag, commhandle, rc)
!
! !ARGUMENTS:
    type(ESMF_VM),                 intent(in)            :: vm
    integer(ESMF_KIND_I8), target, intent(in)            :: sendData(:)
    integer(ESMF_KIND_I8), target, intent(out)           :: recvData(:)
    integer,                       intent(in)            :: count
    type(ESMF_Reduce_Flag),        intent(in)            :: reduceflag
type(ESMF_KeywordEnforcer), optional:: keywordEnforcer ! must use keywords below
    type(ESMF_Sync_Flag),          intent(in),  optional :: syncflag
    type(ESMF_CommHandle),         intent(out), optional :: commhandle
    integer,                       intent(out), optional :: rc
!         
!EOPI
!------------------------------------------------------------------------------
    integer                 :: localrc      ! local return code

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

    ! Check init status of arguments
    ESMF_INIT_CHECK_DEEP(ESMF_VMGetInit, vm, rc)

    ! Initialize commhandle to an invalid pointer
    if (present(commhandle)) commhandle%this = ESMF_NULL_POINTER

    ! Not implemented features
    if (present(syncflag)) then
      if (syncflag == ESMF_SYNC_NONBLOCKING) then
        call ESMF_LogSetError(ESMF_RC_NOT_IMPL, &
          msg="non-blocking mode not yet implemented", &
          ESMF_CONTEXT, rcToReturn=rc)
        return
      endif
    endif

    if (count > 0) then
      ! Call into the C++ interface.
      call c_ESMC_VMAllReduce(vm, sendData(1), recvData(1), count, &
        ESMF_TYPEKIND_I8, reduceflag, localrc)
      if (ESMF_LogFoundError(localrc, ESMF_ERR_PASSTHRU, &
        ESMF_CONTEXT, rcToReturn=rc)) return
    endif

    ! return successfully
    if (present(rc)) rc = ESMF_SUCCESS

  end subroutine ESMF_VMAllReduceI8