pc_identity_device.f90

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module device_identity
  use device
  use device_math
  use precon, only : pc_t
  use num_types, only : rp
  use, intrinsic :: iso_c_binding, only : c_ptr
  implicit none
  private
 
  type, public, extends(pc_t) :: device_ident_t
   contains
     procedure, pass(this) :: solve => device_ident_solve
     procedure, pass(this) :: update => device_ident_update
  end type device_ident_t
 
contains
 
  subroutine device_ident_solve(this, z, r, n)
    integer, intent(in) :: n
    class(device_ident_t), intent(inout) :: this
    real(kind=rp), dimension(n), intent(inout) :: z
    real(kind=rp), dimension(n), intent(inout) :: r
    type(c_ptr) :: z_d, r_d
 
    z_d = device_get_ptr(z)
    r_d = device_get_ptr(r)
 
    call device_copy(z_d, r_d, n)
 
  end subroutine device_ident_solve
 
  subroutine device_ident_update(this)
    class(device_ident_t), intent(inout) :: this
  end subroutine device_ident_update
 
end module device_identity