psblas3/base/tools/psb_cd_set_bld.f90

!!$ 
!!$              Parallel Sparse BLAS  version 2.2
!!$    (C) Copyright 2006/2007/2008
!!$                       Salvatore Filippone    University of Rome Tor Vergata
!!$                       Alfredo Buttari        University of Rome Tor Vergata
!!$ 
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!!$  
subroutine psb_cd_set_ovl_bld(desc,info)
  use psb_sparse_mod, psb_protect_name => psb_cd_set_ovl_bld
  implicit none
  type(psb_desc_type), intent(inout) :: desc
  integer                            :: info

  call psb_cd_set_bld(desc,info) 
  if (info == psb_success_) desc%matrix_data(psb_dec_type_) = psb_cd_ovl_bld_ 

end subroutine psb_cd_set_ovl_bld

subroutine psb_cd_set_bld(desc,info)
  use psb_sparse_mod, psb_protect_name => psb_cd_set_bld
  use psi_mod
  implicit none
  type(psb_desc_type), intent(inout) :: desc
  integer                            :: info
  !locals
  integer             :: np,me,ictxt, err_act,idx,gidx,lidx,nc
  logical, parameter  :: debug=.false.,debugprt=.false.
  character(len=20)   :: name
  if (debug) write(psb_err_unit,*) me,'Entered CDCPY'
  if (psb_get_errstatus() /= 0) return 
  info = psb_success_
  call psb_erractionsave(err_act)
  name = 'psb_cd_set_bld'

  ictxt = psb_cd_get_context(desc)

  if (debug) write(psb_err_unit,*)'Entered CDSETBLD',ictxt
  ! check on blacs grid 
  call psb_info(ictxt, me, np)
  if (debug) write(psb_err_unit,*) me,'Entered CDSETBLD'
  if (psb_is_asb_desc(desc)) then 
  end if

  desc%matrix_data(psb_dec_type_) = psb_desc_bld_ 
  
  if (psb_is_large_desc(desc)) then 
    !
    ! The idea: first build glb_lc with the info on
    ! rows we already have, then leave space in
    ! hash for newcomers (halo indices).
    ! The policy is to allocate for as many entries
    ! as there are rows; if we ever fill them up, we can
    ! try and enlarge again, but by the time the hash
    ! fills up it means we have as many halo as internals,
    ! therefore there are much worse problems ahead than
    ! the hash occupancy.
    !
    nc = psb_cd_get_local_cols(desc)
    if (info == psb_success_)&
         & call psb_hash_init(nc,desc%idxmap%hash,info)
    if (info == HashDuplicate) then 
      info = psb_err_dupl_cd_vl
      call psb_errpush(info,name,a_err='hashInit')
      goto 9999
    end if
    if (info == psb_success_) call psi_bld_g2lmap(desc,info)
    if (info /= psb_success_) then 
      call psb_errpush(psb_err_from_subroutine_,name,a_err='hashInit')
      goto 9999      
    end if

  end if

  if (debug) write(psb_err_unit,*) me,'SET_BLD: done'
  call psb_erractionrestore(err_act)
  return

9999 continue
  call psb_erractionrestore(err_act)

  if (err_act == psb_act_ret_) then
    return
  else
    call psb_error(ictxt)
  end if
  return
end subroutine psb_cd_set_bld