field_dirichlet.f90

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module field_dirichlet
  use num_types, only : rp
  use coefs, only : coef_t
  use dirichlet, only : dirichlet_t
  use bc, only : bc_t, bc_dirichlet
  use bc_list, only : bc_list_t
  use utils, only : split_string
  use field, only : field_t
  use field_list, only : field_list_t
  use math, only : masked_copy_0
  use device_math, only : device_masked_copy_0
  use dofmap, only : dofmap_t
  use utils, only : neko_error
  use json_module, only : json_file
  use field_list, only : field_list_t
  use json_utils, only : json_get
  use, intrinsic :: iso_c_binding, only : c_ptr, c_size_t
  use time_state, only : time_state_t
  implicit none
  private
 
  type, public, extends(bc_t) :: field_dirichlet_t
     type(field_t) :: field_bc
     type(field_list_t) :: field_list
     procedure(field_dirichlet_update), nopass, pointer :: update => null()
   contains
     procedure, pass(this) :: init => field_dirichlet_init
     procedure, pass(this) :: init_from_components => &
          field_dirichlet_init_from_components
     procedure, pass(this) :: free => field_dirichlet_free
     procedure, pass(this) :: finalize => field_dirichlet_finalize
     procedure, pass(this) :: apply_scalar => field_dirichlet_apply_scalar
     procedure, pass(this) :: apply_vector => field_dirichlet_apply_vector
     procedure, pass(this) :: apply_vector_dev => &
          field_dirichlet_apply_vector_dev
     procedure, pass(this) :: apply_scalar_dev => &
          field_dirichlet_apply_scalar_dev
 
  end type field_dirichlet_t
 
  abstract interface
     subroutine field_dirichlet_update(fields, bc, time)
       import rp, field_list_t, bc_t, field_dirichlet_t, time_state_t
       type(field_list_t), intent(inout) :: fields
       type(field_dirichlet_t), intent(in) :: bc
       type(time_state_t), intent(in) :: time
     end subroutine field_dirichlet_update
  end interface
 
  public :: field_dirichlet_update
 
contains
  subroutine field_dirichlet_init(this, coef, json)
    class(field_dirichlet_t), intent(inout), target :: this
    type(coef_t), target, intent(in) :: coef
    type(json_file), intent(inout) ::json
    character(len=:), allocatable :: field_name
 
    call json_get(json, "field_name", field_name)
    call this%init_from_components(coef, field_name)
 
  end subroutine field_dirichlet_init
 
  subroutine field_dirichlet_init_from_components(this, coef, field_name)
    class(field_dirichlet_t), intent(inout), target :: this
    type(coef_t), intent(in) :: coef
    character(len=*), intent(in) :: field_name
 
    call this%init_base(coef)
    this%bc_type = bc_dirichlet
 
    call this%field_bc%init(this%dof, field_name)
    call this%field_list%init(1)
    call this%field_list%assign_to_field(1, this%field_bc)
  end subroutine field_dirichlet_init_from_components
 
  subroutine field_dirichlet_free(this)
    class(field_dirichlet_t), target, intent(inout) :: this
 
    call this%free_base
    call this%field_bc%free()
    call this%field_list%free()
 
    if (associated(this%update)) then
       this%update => null()
    end if
 
  end subroutine field_dirichlet_free
 
  subroutine field_dirichlet_apply_scalar(this, x, n, time, strong)
    class(field_dirichlet_t), intent(inout) :: this
    integer, intent(in) :: n
    real(kind=rp), intent(inout), dimension(n) :: x
    type(time_state_t), intent(in), optional :: time
    logical, intent(in), optional :: strong
    logical :: strong_
 
    if (present(strong)) then
       strong_ = strong
    else
       strong_ = .true.
    end if
 
    if (strong_) then
 
       !$omp single
       if (.not. this%updated) then
          call this%update(this%field_list, this, time)
          this%updated = .true.
       end if
       !$omp end single
 
       call masked_copy_0(x, this%field_bc%x, this%msk, n, this%msk(0))
    end if
 
  end subroutine field_dirichlet_apply_scalar
 
  subroutine field_dirichlet_apply_scalar_dev(this, x_d, time, strong, strm)
    class(field_dirichlet_t), intent(inout), target :: this
    type(c_ptr), intent(inout) :: x_d
    type(time_state_t), intent(in), optional :: time
    logical, intent(in), optional :: strong
    type(c_ptr), intent(inout) :: strm
    logical :: strong_
 
    if (present(strong)) then
       strong_ = strong
    else
       strong_ = .true.
    end if
 
    if (strong_) then
       !$omp single
       if (.not. this%updated) then
          call this%update(this%field_list, this, time)
          this%updated = .true.
       end if
       !$omp end single
 
       if (this%msk(0) .gt. 0) then
          call device_masked_copy_0(x_d, this%field_bc%x_d, this%msk_d, &
               this%field_bc%dof%size(), this%msk(0), strm)
       end if
    end if
 
  end subroutine field_dirichlet_apply_scalar_dev
 
  subroutine field_dirichlet_apply_vector(this, x, y, z, n, time, strong)
    class(field_dirichlet_t), intent(inout) :: this
    integer, intent(in) :: n
    real(kind=rp), intent(inout), dimension(n) :: x
    real(kind=rp), intent(inout), dimension(n) :: y
    real(kind=rp), intent(inout), dimension(n) :: z
    type(time_state_t), intent(in), optional :: time
    logical, intent(in), optional :: strong
 
    call neko_error("field_dirichlet cannot apply vector BCs.&
    & Use field_dirichlet_vector instead!")
 
  end subroutine field_dirichlet_apply_vector
 
  subroutine field_dirichlet_apply_vector_dev(this, x_d, y_d, z_d, time, &
       strong, strm)
    class(field_dirichlet_t), intent(inout), target :: this
    type(c_ptr), intent(inout) :: x_d
    type(c_ptr), intent(inout) :: y_d
    type(c_ptr), intent(inout) :: z_d
    type(time_state_t), intent(in), optional :: time
    logical, intent(in), optional :: strong
    type(c_ptr), intent(inout) :: strm
    call neko_error("field_dirichlet cannot apply vector BCs.&
    & Use field_dirichlet_vector instead!")
 
  end subroutine field_dirichlet_apply_vector_dev
 
  subroutine field_dirichlet_finalize(this)
    class(field_dirichlet_t), target, intent(inout) :: this
    call this%finalize_base()
  end subroutine field_dirichlet_finalize
end module field_dirichlet