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module timer_module
implicit none
abstract interface
subroutine timer_callback (dname, k)
character(len=8), intent(in) :: dname
integer, intent(in) :: k
end subroutine timer_callback
end interface
public :: null_timer
procedure(timer_callback), pointer :: timer => null_timer
contains
!
! default Fortran implementation which does nothing
!
subroutine null_timer (dname, k)
implicit none
character(len=8), intent(in) :: dname
integer, intent(in) :: k
end subroutine null_timer
end module timer_module
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