src/beam_stats_ets_table.erl

   1 -module(beam_stats_ets_table).
   2
   3 -include("include/beam_stats_ets_table.hrl").
   4
   5 -export_type(
   6     [ t/0
   7     , id/0
   8     ]).
   9
  10 -export(
  11     [ of_id/1
  12     ]).
  13
  14 -type id() ::
  15       atom()
  16     | ets:tid()
  17     % integer() is just a workaround, to let us mock ets:tid(), which is
  18     % opaque, but represented as an integer, without Dialyzer complaining.
  19     | integer()
  20     .
  21
  22 -type t() ::
  23     #?MODULE{}.
  24
  25 -spec of_id(id()) ->
  26     t().
  27 of_id(ID) ->
  28     WordSize      = beam_stats_source:erlang_system_info(wordsize),
  29     NumberOfWords = beam_stats_source:ets_info(ID, memory),
  30     NumberOfBytes = NumberOfWords * WordSize,
  31     #?MODULE
  32     { id     = ID
  33     , name   = beam_stats_source:ets_info(ID, name)
  34     , size   = beam_stats_source:ets_info(ID, size)
  35     , memory = NumberOfBytes
  36     }.