%% -*- erlang-indent-level: 2 -*-
%%-------------------------------------------------------------------
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2006-2012. 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.
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%% %CopyrightEnd%
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%%%-------------------------------------------------------------------
%%% File : dialyzer_timing.erl
%%% Authors : Stavros Aronis <[email protected]>
%%% Description : Timing reports for Dialyzer
%%%-------------------------------------------------------------------
-module(dialyzer_timing).
-export([init/1, start_stamp/1, end_stamp/0, stop/0]).
-spec init(boolean()) -> ok.
init(Active) ->
Pid = spawn(fun() -> loop_init(Active) end),
case whereis(?MODULE) of
undefined -> ok;
_ -> unregister(?MODULE)
end,
register(?MODULE, Pid),
ok.
loop_init(Active) ->
case Active of
true ->
io:format("\n"),
loop(now());
false -> dummy_loop()
end.
dummy_loop() ->
receive
{Pid, stop, _Now} -> Pid ! ok;
_ -> dummy_loop()
end.
loop(LastNow) ->
receive
{stamp, Msg, Now} ->
io:format(" ~-10s (+~4.2fs):", [Msg, diff(Now, LastNow)]),
loop(Now);
{stamp, Now} ->
io:format("~7.2fs\n", [diff(Now, LastNow)]),
loop(Now);
{Pid, stop, Now} ->
io:format(" ~-10s (+~4.2fs)\n", ["",diff(Now, LastNow)]),
Pid ! ok
end.
-spec start_stamp(string()) -> ok.
start_stamp(Msg) ->
?MODULE ! {stamp, Msg, now()},
ok.
-spec end_stamp() -> ok.
end_stamp() ->
?MODULE ! {stamp, now()},
ok.
-spec stop() -> ok.
stop() ->
?MODULE ! {self(), stop, now()},
receive ok -> ok end.
diff(T2, T1) ->
timer:now_diff(T2,T1) / 1000000.
