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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2007-2009. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-define(seconds(EndTs,StartTs), timer:now_diff(EndTs, StartTs)/1000000).
+
+%%% ------------------- %%%
+%%% Type definitions %%%
+%%% ------------------- %%%
+
+-type(timestamp() :: {non_neg_integer(), non_neg_integer(), non_neg_integer()}).
+-type(true_mfa() :: {atom(), atom(), byte() | list()}).
+-type(state() :: 'active' | 'inactive').
+-type(scheduler_id() :: {'scheduler_id', non_neg_integer()}).
+
+%%% ------------------- %%%
+%%% Records %%%
+%%% ------------------- %%%
+
+-record(activity, {
+ timestamp ,%:: timestamp() ,
+ id ,%:: pid() | port() | scheduler_id(),
+ state = undefined ,%:: state() | 'undefined',
+ where = undefined ,%:: true_mfa() | 'undefined',
+ runnable_count = 0 %:: non_neg_integer()
+ }).
+
+-record(
+ information, {
+ id ,%:: pid() | port(),
+ name = undefined ,%:: atom() | string() | 'undefined',
+ entry = undefined ,%:: true_mfa() | 'undefined',
+ start = undefined ,%:: timestamp() | 'undefined',
+ stop = undefined ,%:: timestamp() | 'undefined',
+ parent = undefined ,%:: pid() | 'undefined',
+ children = [] %:: [pid()]
+ }).
+