%% -*- 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%
%%
%%%-------------------------------------------------------------------
%%% File : dialyzer_timing.erl
%%% Authors : Stavros Aronis <[email protected]>
%%% Description : Timing reports for Dialyzer
%%%-------------------------------------------------------------------
-module(dialyzer_timing).
-export([init/1, start_stamp/2, send_size_info/3, end_stamp/1, stop/1]).
-export_type([timing_server/0]).
-type timing_server() :: pid() | 'none'.
-spec init(boolean()) -> timing_server().
init(Active) ->
case Active of
true ->
io:format("\n"),
spawn_link(fun() -> loop(now(), 0, "") end);
false -> none
end.
loop(LastNow, Size, Unit) ->
receive
{stamp, Msg, Now} ->
io:format(" ~-10s (+~4.2fs):", [Msg, diff(Now, LastNow)]),
loop(Now, 0, "");
{stamp, Now} ->
SizeStr =
case Size of
0 -> "";
_ ->
Data = io_lib:format("~p ~s",[Size, Unit]),
io_lib:format(" (~12s)",[Data])
end,
io:format("~7.2fs~s\n", [diff(Now, LastNow), SizeStr]),
loop(Now, 0, "");
{size, NewSize, NewUnit} ->
loop(LastNow, NewSize, NewUnit);
{Pid, stop, Now} ->
io:format(" ~-9s (+~5.2fs)\n", ["",diff(Now, LastNow)]),
Pid ! ok;
{Pid, stop} ->
Pid ! ok
end.
-spec start_stamp(timing_server(), string()) -> ok.
start_stamp(none, _) -> ok;
start_stamp(Pid, Msg) ->
Pid ! {stamp, Msg, now()},
ok.
-spec end_stamp(timing_server()) -> ok.
end_stamp(none) -> ok;
end_stamp(Pid) ->
Pid ! {stamp, now()},
ok.
-spec send_size_info(timing_server(), integer(), string()) -> ok.
send_size_info(none, _, _) -> ok;
send_size_info(Pid, Size, Unit) ->
Pid ! {size, Size, Unit},
ok.
-spec stop(timing_server()) -> ok.
stop(none) -> ok;
stop(Pid) ->
Pid ! {self(), stop, now()},
receive ok -> ok end.
diff(T2, T1) ->
timer:now_diff(T2,T1) / 1000000.
