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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2019. 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%
%%
-module(literal_area_collector_test).
-export([check_idle/1]).
check_idle(Timeout) when is_integer(Timeout) > 0 ->
Start = erlang:monotonic_time(millisecond),
LAC = find_lac(),
wait_until(fun () ->
case process_info(LAC, [status,
current_function,
current_stacktrace,
message_queue_len]) of
[{status,waiting},
{current_function,
{erts_literal_area_collector,msg_loop,4}},
{current_stacktrace,
[{erts_literal_area_collector,msg_loop,4,_}]},
{message_queue_len,0}] ->
true;
CurrState ->
Now = erlang:monotonic_time(millisecond),
case Now - Start > Timeout of
true ->
exit({non_idle_literal_area_collecor,
CurrState});
false ->
false
end
end
end),
ok.
find_lac() ->
try
lists:foreach(fun (P) ->
case process_info(P, initial_call) of
{initial_call,
{erts_literal_area_collector,start,0}} ->
throw({lac, P});
_ ->
ok
end
end, processes()),
exit(no_literal_area_collector)
catch
throw:{lac, LAC} ->
LAC
end.
wait_until(Fun) ->
Res = try
Fun()
catch
T:R -> {T,R}
end,
case Res of
true -> ok;
_ -> wait_until(Fun)
end.
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