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%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2002-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Copyright (c) 2002 by Erik Johansson.
%% ====================================================================
%% Module : hipe_jit
%% Purpose :
%% Notes :
%% History : * 2002-03-14 Erik Johansson ([email protected]): Created.
%% ====================================================================
%% @doc
%% A tool to enable using the HiPE compiler as an automatic JIT
%% compiler rather than a user-controlled one.
%% @end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-module(hipe_jit).
-export([start/0]).
-record(state, {mode = start :: 'sleep' | 'start' | 'wait',
threshold = 5000 :: non_neg_integer(),
sleep = 5000 :: non_neg_integer(),
time = 1000 :: non_neg_integer()}).
%%---------------------------------------------------------------------
-spec start() -> pid().
%% @doc
%% Starts an Erlang process which calls the HiPE compiler every
%% now and then (when it sees it fit to do so).
%% @end
start() ->
spawn(fun () -> loop(#state{}) end).
loop(State) ->
case State#state.mode of
start ->
start(State);
wait ->
wait(State);
_ ->
sleep(State)
end.
sleep(State) ->
receive
quit -> ok
after State#state.sleep ->
loop(State#state{mode=start})
end.
start(State) ->
catch hipe_profile:prof(),
catch hipe_profile:clear(),
loop(State#state{mode=wait}).
wait(State) ->
receive
quit -> ok
after State#state.time ->
R = [M || {M,C} <- (catch hipe_profile:mods_res()),
C > State#state.threshold],
catch hipe_profile:prof_off(),
lists:foreach(fun(M) ->
io:format("Compile ~w\n",[M]),
hipe:c(M,[o2,verbose])
end, R)
end,
loop(State#state{mode=sleep}).
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