%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2018. 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(counters_SUITE).
-include_lib("common_test/include/ct.hrl").
-compile(export_all).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[basic, bad, limits].
basic(Config) when is_list(Config) ->
Size = 10,
[begin
Ref = counters:new(Size,[Type]),
#{size:=Size, memory:=Memory} = counters:info(Ref),
check_memory(Type, Memory, Size),
[basic_do(Ref, Ix) || Ix <- lists:seq(1, Size)]
end
|| Type <- [atomics, write_concurrency]],
ok.
basic_do(Ref, Ix) ->
0 = counters:get(Ref, Ix),
ok = counters:add(Ref, Ix, 3),
3 = counters:get(Ref, Ix),
ok = counters:add(Ref, Ix, 14),
17 = counters:get(Ref, Ix),
ok = counters:add(Ref, Ix, -20),
-3 = counters:get(Ref, Ix),
ok = counters:add(Ref, Ix, 100),
97 = counters:get(Ref, Ix),
ok = counters:sub(Ref, Ix, 20),
77 = counters:get(Ref, Ix),
ok = counters:sub(Ref, Ix, -10),
87 = counters:get(Ref, Ix),
ok.
check_memory(atomics, Memory, Size) ->
{_,true} = {Memory, Memory > Size*8},
{_,true} = {Memory, Memory < Size*max_atomic_sz() + 100};
check_memory(write_concurrency, Memory, Size) ->
NScheds = erlang:system_info(schedulers),
{_,true} = {Memory, Memory > NScheds*Size*8},
{_,true} = {Memory, Memory < NScheds*(Size+7)*max_atomic_sz() + 100}.
max_atomic_sz() ->
case erlang:system_info({wordsize, external}) of
4 -> 16;
8 ->
EI = erlang:system_info(ethread_info),
case lists:keyfind("64-bit native atomics", 1, EI) of
{_, "no", _} -> 16;
_ -> 8
end
end.
bad(Config) when is_list(Config) ->
{'EXIT',{badarg,_}} = (catch counters:new(0,[])),
{'EXIT',{badarg,_}} = (catch counters:new(10,[bad])),
{'EXIT',{badarg,_}} = (catch counters:new(10,[atomic, bad])),
{'EXIT',{badarg,_}} = (catch counters:new(10,[write_concurrency | bad])),
Ref = counters:new(10,[]),
{'EXIT',{badarg,_}} = (catch counters:get(1742, 7)),
{'EXIT',{badarg,_}} = (catch counters:get(make_ref(), 7)),
{'EXIT',{badarg,_}} = (catch counters:get(Ref, -1)),
{'EXIT',{badarg,_}} = (catch counters:get(Ref, 0)),
{'EXIT',{badarg,_}} = (catch counters:get(Ref, 11)),
{'EXIT',{badarg,_}} = (catch counters:get(Ref, 7.0)),
ok.
limits(Config) when is_list(Config) ->
Bits = 64,
Max = (1 bsl (Bits-1)) - 1,
Min = -(1 bsl (Bits-1)),
Ref = counters:new(1,[]),
0 = counters:get(Ref, 1),
ok = counters:add(Ref, 1, Max),
ok = counters:add(Ref, 1, 1),
Min = counters:get(Ref, 1),
ok = counters:sub(Ref, 1, 1),
Max = counters:get(Ref, 1),
IncrMax = (Max bsl 1) bor 1,
ok = counters:sub(Ref, 1, counters:get(Ref, 1)),
ok = counters:add(Ref, 1, IncrMax),
-1 = counters:get(Ref, 1),
{'EXIT',{badarg,_}} = (catch counters:add(Ref, 1, IncrMax+1)),
{'EXIT',{badarg,_}} = (catch counters:add(Ref, 1, Min-1)),
ok.
