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psblas3/prec/psb_dprecinit.f90

71 lines
2.8 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.0
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ Redistribution and use in source and binary forms, with or without
!!$ modification, are permitted provided that the following conditions
!!$ are met:
!!$ 1. Redistributions of source code must retain the above copyright
!!$ notice, this list of conditions and the following disclaimer.
!!$ 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 PSBLAS 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
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
!!$ POSSIBILITY OF SUCH DAMAGE.
!!$
!!$
subroutine psb_dprecinit(p,ptype,info)
use psb_base_mod
use psb_prec_mod, psb_protect_name => psb_dprecinit
use psb_d_nullprec
use psb_d_diagprec
use psb_d_bjacprec
implicit none
type(psb_dprec_type), intent(inout) :: p
character(len=*), intent(in) :: ptype
integer, intent(out) :: info
info = psb_success_
if (allocated(p%prec) ) then
call p%prec%precfree(info)
if (info == psb_success_) deallocate(p%prec,stat=info)
if (info /= psb_success_) return
end if
select case(psb_toupper(ptype(1:len_trim(ptype))))
case ('NONE','NOPREC')
allocate(psb_d_null_prec_type :: p%prec, stat=info)
case ('DIAG')
allocate(psb_d_diag_prec_type :: p%prec, stat=info)
case ('BJAC')
allocate(psb_d_bjac_prec_type :: p%prec, stat=info)
case default
write(psb_err_unit,*) 'Unknown preconditioner type request "',ptype,'"'
info = psb_err_pivot_too_small_
end select
if (info == psb_success_) call p%prec%precinit(info)
end subroutine psb_dprecinit