! ! Parallel Sparse BLAS version 3.5 ! (C) Copyright 2006-2018 ! Salvatore Filippone ! Alfredo Buttari ! ! 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_z_nullprec use psb_z_base_prec_mod type, extends(psb_z_base_prec_type) :: psb_z_null_prec_type contains procedure, pass(prec) :: z_apply_v => psb_z_null_apply_vect procedure, pass(prec) :: z_apply => psb_z_null_apply procedure, pass(prec) :: precbld => psb_z_null_precbld procedure, pass(prec) :: precinit => psb_z_null_precinit procedure, pass(prec) :: precdescr => psb_z_null_precdescr procedure, pass(prec) :: sizeof => psb_z_null_sizeof procedure, pass(prec) :: dump => psb_z_null_dump procedure, pass(prec) :: clone => psb_z_null_clone procedure, pass(prec) :: free => psb_z_null_precfree end type psb_z_null_prec_type private :: psb_z_null_precbld, psb_z_null_sizeof,& & psb_z_null_precinit, psb_z_null_precfree, psb_z_null_precdescr interface subroutine psb_z_null_apply_vect(alpha,prec,x,beta,y,desc_data,info,trans,work) import :: psb_ipk_, psb_desc_type, psb_z_null_prec_type, psb_z_vect_type, psb_dpk_ type(psb_desc_type),intent(in) :: desc_data class(psb_z_null_prec_type), intent(inout) :: prec type(psb_z_vect_type),intent(inout) :: x complex(psb_dpk_),intent(in) :: alpha, beta type(psb_z_vect_type),intent(inout) :: y integer(psb_ipk_), intent(out) :: info character(len=1), optional :: trans complex(psb_dpk_),intent(inout), optional, target :: work(:) end subroutine psb_z_null_apply_vect end interface interface subroutine psb_z_null_apply(alpha,prec,x,beta,y,desc_data,info,trans,work) import :: psb_ipk_, psb_desc_type, psb_z_null_prec_type, psb_dpk_ type(psb_desc_type),intent(in) :: desc_data class(psb_z_null_prec_type), intent(inout) :: prec complex(psb_dpk_),intent(inout) :: x(:) complex(psb_dpk_),intent(in) :: alpha, beta complex(psb_dpk_),intent(inout) :: y(:) integer(psb_ipk_), intent(out) :: info character(len=1), optional :: trans complex(psb_dpk_),intent(inout), optional, target :: work(:) end subroutine psb_z_null_apply end interface contains subroutine psb_z_null_precinit(prec,info) Implicit None class(psb_z_null_prec_type),intent(inout) :: prec integer(psb_ipk_), intent(out) :: info integer(psb_ipk_) :: err_act, nrow character(len=20) :: name='z_null_precinit' call psb_erractionsave(err_act) info = psb_success_ call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine psb_z_null_precinit subroutine psb_z_null_precbld(a,desc_a,prec,info,amold,vmold,imold) Implicit None type(psb_zspmat_type), intent(in), target :: a type(psb_desc_type), intent(inout), target :: desc_a class(psb_z_null_prec_type),intent(inout) :: prec integer(psb_ipk_), intent(out) :: info class(psb_z_base_sparse_mat), intent(in), optional :: amold class(psb_z_base_vect_type), intent(in), optional :: vmold class(psb_i_base_vect_type), intent(in), optional :: imold integer(psb_ipk_) :: err_act, nrow character(len=20) :: name='z_null_precbld' call psb_erractionsave(err_act) info = psb_success_ call prec%set_ctxt(desc_a%get_ctxt()) call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine psb_z_null_precbld subroutine psb_z_null_precfree(prec,info) Implicit None class(psb_z_null_prec_type), intent(inout) :: prec integer(psb_ipk_), intent(out) :: info integer(psb_ipk_) :: err_act, nrow character(len=20) :: name='z_null_precset' call psb_erractionsave(err_act) info = psb_success_ call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine psb_z_null_precfree subroutine psb_z_null_precdescr(prec,iout,root) use psb_penv_mod use psb_error_mod Implicit None class(psb_z_null_prec_type), intent(in) :: prec integer(psb_ipk_), intent(in), optional :: iout integer(psb_ipk_), intent(in), optional :: root integer(psb_ipk_) :: err_act, nrow, info character(len=20) :: name='z_null_precset' character(len=32) :: dprefix, frmtv integer(psb_ipk_) :: ni integer(psb_ipk_) :: iout_, ictxt, iam, np, root_ call psb_erractionsave(err_act) info = psb_success_ if (present(iout)) then iout_ = iout else iout_ = 6 end if if (present(root)) then root_ = root else root_ = psb_root_ end if ictxt = prec%ictxt call psb_info(ictxt,iam,np) if (root_ == -1) root_ = iam if (iam == root_) & & write(iout_,*) trim(prec%desc_prefix()),' ',& & 'No preconditioning' call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine psb_z_null_precdescr subroutine psb_z_null_dump(prec,info,prefix,head) use psb_base_mod, only : psb_info implicit none class(psb_z_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_z" 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_z_null_dump function psb_z_null_sizeof(prec) result(val) class(psb_z_null_prec_type), intent(in) :: prec integer(psb_epk_) :: val val = 0 return end function psb_z_null_sizeof subroutine psb_z_null_clone(prec,precout,info) use psb_const_mod use psb_error_mod Implicit None class(psb_z_null_prec_type), intent(inout) :: prec class(psb_z_base_prec_type), allocatable, intent(inout) :: precout integer(psb_ipk_), intent(out) :: info integer(psb_ipk_) :: err_act, i character(len=20) :: name='z_null_clone' call psb_erractionsave(err_act) info = psb_success_ if (allocated(precout)) then call precout%free(info) if (info == psb_success_) deallocate(precout, stat=info) end if if (info == psb_success_) & & allocate(psb_z_null_prec_type :: precout, stat=info) if (info /= 0) goto 9999 select type(pout => precout) type is (psb_z_null_prec_type) call pout%set_ctxt(prec%get_ctxt()) class default info = psb_err_internal_error_ end select if (info /= 0) goto 9999 call psb_erractionrestore(err_act) return 9999 call psb_error_handler(err_act) return end subroutine psb_z_null_clone end module psb_z_nullprec