precon_fctry.f90

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module precon_fctry
  use precon
  use identity
  use device_identity
  use jacobi
  use sx_jacobi
  use device_jacobi
  use hsmg
  use utils
  use neko_config
  implicit none
 
contains
 
  subroutine precon_factory(pc, pctype)
    class(pc_t), target, allocatable, intent(inout) :: pc
    character(len=*), intent(in) :: pctype
 
    if (allocated(pc)) then
       call precon_destroy(pc)
       deallocate(pc)
    end if
 
    if (trim(pctype) .eq. 'jacobi') then
       if (neko_bcknd_sx .eq. 1) then
          allocate(sx_jacobi_t::pc)
       else if (neko_bcknd_device .eq. 1) then
          allocate(device_jacobi_t::pc)
       else
          allocate(jacobi_t::pc)
       end if
    else if (pctype(1:4) .eq. 'hsmg') then
       allocate(hsmg_t::pc)
    else if(trim(pctype) .eq. 'ident') then
       if (neko_bcknd_device .eq. 1) then
          allocate(device_ident_t::pc)
       else
          allocate(ident_t::pc)
       end if
    else
       call neko_error('Unknown preconditioner '//trim(pctype))
    end if
 
  end subroutine precon_factory
 
  subroutine precon_destroy(pc)
    class(pc_t), allocatable, intent(inout) :: pc
 
    if (allocated(pc)) then
       select type(pcp => pc)
       type is(jacobi_t)
          call pcp%free()
       type is(sx_jacobi_t)
          call pcp%free()
       type is(device_jacobi_t)
          call pcp%free()
       type is (hsmg_t)
          call pcp%free()
       end select
    end if
 
  end subroutine precon_destroy
 
end module precon_fctry