!!$ !!$ Parallel Sparse BLAS version 3.0 !!$ (C) Copyright 2006, 2007, 2008, 2009, 2010, 2012 !!$ 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. !!$ !!$ module psb_s_nullprec use psb_s_base_prec_mod type, extends(psb_s_base_prec_type) :: psb_s_null_prec_type contains procedure, pass(prec) :: s_apply_v => psb_s_null_apply_vect procedure, pass(prec) :: s_apply => psb_s_null_apply procedure, pass(prec) :: precbld => psb_s_null_precbld procedure, pass(prec) :: precinit => psb_s_null_precinit procedure, pass(prec) :: precfree => psb_s_null_precfree procedure, pass(prec) :: precdescr => psb_s_null_precdescr procedure, pass(prec) :: sizeof => psb_s_null_sizeof procedure, pass(prec) :: dump => psb_s_null_dump end type psb_s_null_prec_type private :: psb_s_null_precbld, psb_s_null_sizeof,& & psb_s_null_precinit, psb_s_null_precfree, psb_s_null_precdescr interface subroutine psb_s_null_apply_vect(alpha,prec,x,beta,y,desc_data,info,trans,work) import :: psb_ipk_, psb_desc_type, psb_s_null_prec_type, psb_s_vect_type, psb_spk_ type(psb_desc_type),intent(in) :: desc_data class(psb_s_null_prec_type), intent(inout) :: prec type(psb_s_vect_type),intent(inout) :: x real(psb_spk_),intent(in) :: alpha, beta type(psb_s_vect_type),intent(inout) :: y integer(psb_ipk_), intent(out) :: info character(len=1), optional :: trans real(psb_spk_),intent(inout), optional, target :: work(:) end subroutine psb_s_null_apply_vect end interface interface subroutine psb_s_null_apply(alpha,prec,x,beta,y,desc_data,info,trans,work) import :: psb_ipk_, psb_desc_type, psb_s_null_prec_type, psb_spk_ type(psb_desc_type),intent(in) :: desc_data class(psb_s_null_prec_type), intent(in) :: prec real(psb_spk_),intent(inout) :: x(:) real(psb_spk_),intent(in) :: alpha, beta real(psb_spk_),intent(inout) :: y(:) integer(psb_ipk_), intent(out) :: info character(len=1), optional :: trans real(psb_spk_),intent(inout), optional, target :: work(:) end subroutine psb_s_null_apply end interface contains subroutine psb_s_null_precinit(prec,info) Implicit None class(psb_s_null_prec_type),intent(inout) :: prec integer(psb_ipk_), intent(out) :: info integer(psb_ipk_) :: err_act, nrow character(len=20) :: name='s_null_precinit' call psb_erractionsave(err_act) info = psb_success_ call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine psb_s_null_precinit subroutine psb_s_null_precbld(a,desc_a,prec,info,upd,amold,afmt,vmold) Implicit None type(psb_sspmat_type), intent(in), target :: a type(psb_desc_type), intent(in), target :: desc_a class(psb_s_null_prec_type),intent(inout) :: prec integer(psb_ipk_), intent(out) :: info character, intent(in), optional :: upd character(len=*), intent(in), optional :: afmt class(psb_s_base_sparse_mat), intent(in), optional :: amold class(psb_s_base_vect_type), intent(in), optional :: vmold integer(psb_ipk_) :: err_act, nrow character(len=20) :: name='s_null_precbld' call psb_erractionsave(err_act) info = psb_success_ call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine psb_s_null_precbld subroutine psb_s_null_precfree(prec,info) Implicit None class(psb_s_null_prec_type), intent(inout) :: prec integer(psb_ipk_), intent(out) :: info integer(psb_ipk_) :: err_act, nrow character(len=20) :: name='s_null_precset' call psb_erractionsave(err_act) info = psb_success_ call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine psb_s_null_precfree subroutine psb_s_null_precdescr(prec,iout) Implicit None class(psb_s_null_prec_type), intent(in) :: prec integer(psb_ipk_), intent(in), optional :: iout integer(psb_ipk_) :: err_act, nrow, info character(len=20) :: name='s_null_precset' integer(psb_ipk_) :: iout_ call psb_erractionsave(err_act) info = psb_success_ if (present(iout)) then iout_ = iout else iout_ = 6 end if write(iout_,*) 'No preconditioning' call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act == psb_act_abort_) then call psb_error() return end if return end subroutine psb_s_null_precdescr subroutine psb_s_null_dump(prec,info,prefix,head) use psb_base_mod, only : psb_info implicit none class(psb_s_null_prec_type), intent(in) :: prec integer(psb_ipk_), intent(out) :: info character(len=*), intent(in), optional :: prefix,head integer(psb_ipk_) :: iout, iam, np, ictxt, lname logical :: isopen character(len=80) :: prefix_ character(len=120) :: fname ! len should be at least 20 more than ! len of prefix_ info = 0 ictxt = prec%get_ctxt() call psb_info(ictxt,iam,np) if (present(prefix)) then prefix_ = trim(prefix(1:min(len(prefix),len(prefix_)))) else prefix_ = "dump_null_s" end if lname = len_trim(prefix_) fname = trim(prefix_) write(fname(lname+1:lname+5),'(a,i3.3)') '_p',iam lname = lname + 5 ! Search for an unused unit to write iout = 7 do inquire(unit=iout, opened=isopen) if (.not.isopen) exit iout = iout + 1 if (iout > 99) exit end do if (iout > 99) then write(psb_err_unit,*) 'Error: could not find a free unit for I/O' return end if open(iout,file=fname,iostat=info) write(iout,*) 'Null (Identity) Preconditioner. Nothing to be printed, really!' end subroutine psb_s_null_dump function psb_s_null_sizeof(prec) result(val) class(psb_s_null_prec_type), intent(in) :: prec integer(psb_long_int_k_) :: val val = 0 return end function psb_s_null_sizeof end module psb_s_nullprec