amg4psblas/mlprec/mld_z_id_solver.f90

!!$
!!$ 
!!$                           MLD2P4  version 2.0
!!$  MultiLevel Domain Decomposition Parallel Preconditioners Package
!!$             based on PSBLAS (Parallel Sparse BLAS version 3.0)
!!$  
!!$  (C) Copyright 2008,2009,2010, 2010
!!$
!!$                      Salvatore Filippone  University of Rome Tor Vergata
!!$                      Alfredo Buttari      CNRS-IRIT, Toulouse
!!$                      Pasqua D'Ambra       ICAR-CNR, Naples
!!$                      Daniela di Serafino  Second University of Naples
!!$ 
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!
!
!
! Identity solver. Reference for nullprec. 
!
!

module mld_z_id_solver

  use mld_z_base_solver_mod

  type, extends(mld_z_base_solver_type) :: mld_z_id_solver_type
  contains
    procedure, pass(sv) :: build   => z_id_solver_bld
    procedure, pass(sv) :: apply_v => mld_z_id_solver_apply_vect
    procedure, pass(sv) :: apply_a => mld_z_id_solver_apply
    procedure, pass(sv) :: free    => z_id_solver_free
    procedure, pass(sv) :: seti    => z_id_solver_seti
    procedure, pass(sv) :: setc    => z_id_solver_setc
    procedure, pass(sv) :: setr    => z_id_solver_setr
    procedure, pass(sv) :: descr   => z_id_solver_descr
  end type mld_z_id_solver_type


  private :: z_id_solver_bld, &
       &  z_id_solver_free,   z_id_solver_seti, &
       &  z_id_solver_setc,   z_id_solver_setr,&
       &  z_id_solver_descr

  interface mld_z_id_solver_apply_vect
    subroutine mld_z_id_solver_apply_vect(alpha,sv,x,beta,y,desc_data,trans,work,info)
      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
           & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, mld_z_id_solver_type
      type(psb_desc_type), intent(in)            :: desc_data
      class(mld_z_id_solver_type), intent(inout) :: sv
      type(psb_z_vect_type),intent(inout)        :: x
      type(psb_z_vect_type),intent(inout)        :: y
      complex(psb_dpk_),intent(in)                  :: alpha,beta
      character(len=1),intent(in)                :: trans
      complex(psb_dpk_),target, intent(inout)       :: work(:)
      integer, intent(out)                       :: info
    end subroutine mld_z_id_solver_apply_vect
  end interface mld_z_id_solver_apply_vect
  
  interface mld_z_id_solver_apply
    subroutine mld_z_id_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info)
      import :: psb_desc_type, psb_zspmat_type,  psb_z_base_sparse_mat, &
           & psb_z_vect_type, psb_z_base_vect_type, psb_dpk_, mld_z_id_solver_type
      type(psb_desc_type), intent(in)      :: desc_data
      class(mld_z_id_solver_type), intent(in) :: sv
      complex(psb_dpk_),intent(inout)         :: x(:)
      complex(psb_dpk_),intent(inout)         :: y(:)
      complex(psb_dpk_),intent(in)            :: alpha,beta
      character(len=1),intent(in)          :: trans
      complex(psb_dpk_),target, intent(inout) :: work(:)
      integer, intent(out)                 :: info
    end subroutine mld_z_id_solver_apply
  end interface mld_z_id_solver_apply

contains


  subroutine z_id_solver_bld(a,desc_a,sv,upd,info,b,amold,vmold)

    Implicit None

    ! Arguments
    type(psb_zspmat_type), intent(in), target           :: a
    Type(psb_desc_type), Intent(in)                     :: desc_a 
    class(mld_z_id_solver_type), intent(inout)          :: sv
    character, intent(in)                               :: upd
    integer, intent(out)                                :: info
    type(psb_zspmat_type), intent(in), target, optional :: b
    class(psb_z_base_sparse_mat), intent(in), optional  :: amold
    class(psb_z_base_vect_type), intent(in), optional   :: vmold
    ! Local variables
    integer :: n_row,n_col, nrow_a, nztota
    complex(psb_dpk_), pointer :: ww(:), aux(:), tx(:),ty(:)
    integer :: ictxt,np,me,i, err_act, debug_unit, debug_level
    character(len=20)  :: name='z_id_solver_bld', ch_err
    
    info=psb_success_

    return
  end subroutine z_id_solver_bld


  subroutine z_id_solver_seti(sv,what,val,info)

    Implicit None

    ! Arguments
    class(mld_z_id_solver_type), intent(inout) :: sv 
    integer, intent(in)                    :: what 
    integer, intent(in)                    :: val
    integer, intent(out)                   :: info
    Integer :: err_act
    character(len=20)  :: name='z_id_solver_seti'

    info = psb_success_

    return

  end subroutine z_id_solver_seti

  subroutine z_id_solver_setc(sv,what,val,info)

    Implicit None

    ! Arguments
    class(mld_z_id_solver_type), intent(inout) :: sv
    integer, intent(in)                    :: what 
    character(len=*), intent(in)           :: val
    integer, intent(out)                   :: info
    Integer :: err_act, ival
    character(len=20)  :: name='z_id_solver_setc'

    info = psb_success_

    return
  end subroutine z_id_solver_setc
  
  subroutine z_id_solver_setr(sv,what,val,info)

    Implicit None

    ! Arguments
    class(mld_z_id_solver_type), intent(inout) :: sv 
    integer, intent(in)                    :: what 
    real(psb_dpk_), intent(in)             :: val
    integer, intent(out)                   :: info
    Integer :: err_act
    character(len=20)  :: name='z_id_solver_setr'

    info = psb_success_

    return

  end subroutine z_id_solver_setr

  subroutine z_id_solver_free(sv,info)

    Implicit None

    ! Arguments
    class(mld_z_id_solver_type), intent(inout) :: sv
    integer, intent(out)                       :: info
    Integer :: err_act
    character(len=20)  :: name='z_id_solver_free'

    info = psb_success_

    return
  end subroutine z_id_solver_free

  subroutine z_id_solver_descr(sv,info,iout,coarse)

    Implicit None

    ! Arguments
    class(mld_z_id_solver_type), intent(in) :: sv
    integer, intent(out)                      :: info
    integer, intent(in), optional             :: iout
    logical, intent(in), optional       :: coarse

    ! Local variables
    integer      :: err_act
    integer      :: ictxt, me, np
    character(len=20), parameter :: name='mld_z_id_solver_descr'
    integer :: iout_

    info = psb_success_
    if (present(iout)) then 
      iout_ = iout 
    else
      iout_ = 6
    endif
    
    write(iout_,*) '  Identity local solver '

    return

  end subroutine z_id_solver_descr

end module mld_z_id_solver