amg4psblas/mlprec/impl/level/mld_c_base_onelev_setsm.F90

!  
!   
!                             MLD2P4  version 2.1
!    MultiLevel Domain Decomposition Parallel Preconditioners Package
!               based on PSBLAS (Parallel Sparse BLAS version 3.4)
!    
!    (C) Copyright 2008, 2010, 2012, 2015, 2017 
!  
!        Salvatore Filippone    Cranfield University
!        Ambra Abdullahi Hassan University of Rome Tor Vergata
!        Alfredo Buttari        CNRS-IRIT, Toulouse
!        Pasqua D'Ambra         ICAR-CNR, Naples
!        Daniela di Serafino    University of Campania "L. Vanvitelli", Caserta
!   
!    Redistribution and use in source and binary forms, with or without
!    modification, are permitted provided that the following conditions
!    are met:
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!      2. Redistributions in binary form must reproduce the above copyright
!         notice, this list of conditions, and the following disclaimer in the
!         documentation and/or other materials provided with the distribution.
!      3. The name of the MLD2P4 group or the names of its contributors may
!         not be used to endorse or promote products derived from this
!         software without specific written permission.
!   
!    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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!   
!  
subroutine mld_c_base_onelev_setsm(lev,val,info,pos)

  use psb_base_mod
  use mld_c_prec_mod, mld_protect_name => mld_c_base_onelev_setsm

  implicit none

  ! Arguments
  class(mld_c_onelev_type), target, intent(inout) :: lev
  class(mld_c_base_smoother_type), intent(in)  :: val
  integer(psb_ipk_), intent(out)               :: info
  character(len=*), optional, intent(in)       :: pos
  
  ! Local variables
  integer(psb_ipk_)                      :: ipos_
  character(len=*), parameter            :: name='mld_base_onelev_setsm'
  
  info = psb_success_

  if (present(pos)) then
    select case(psb_toupper(trim(pos)))
    case('PRE')
      ipos_ = mld_pre_smooth_
    case('POST')
      ipos_ = mld_post_smooth_
    case default
      ipos_ = mld_pre_smooth_
    end select
  else
    ipos_ = mld_pre_smooth_
  end if
    
  select case(ipos_)
  case(mld_pre_smooth_) 
    if (allocated(lev%sm)) then
      if (.not.same_type_as(lev%sm,val)) then
        call lev%sm%free(info)
        deallocate(lev%sm, stat=info)
      end if
    endif
    if (.not.allocated(lev%sm)) then
#ifdef HAVE_MOLD 
      allocate(lev%sm,mold=val) 
#else
      allocate(lev%sm,source=val) 
#endif
    end if
    call lev%sm%default()        
    lev%sm2 => lev%sm
  case(mld_post_smooth_) 
    if (allocated(lev%sm2a)) then
      if (.not.same_type_as(lev%sm2a,val)) then
        call lev%sm2a%free(info)
        deallocate(lev%sm2a, stat=info)
      endif
    end if
    if (.not.allocated(lev%sm2a)) then
#ifdef HAVE_MOLD 
      allocate(lev%sm2a,mold=val) 
#else
      allocate(lev%sm2a,source=val) 
#endif
    end if
    call lev%sm2a%default()
    lev%sm2 => lev%sm2a
  end select
    
end subroutine mld_c_base_onelev_setsm