aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/test/ref_SUITE.erl
blob: e84d53a89efef5e6d041ef640fb338d459266e77 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
%%
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 1999-2011. 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(ref_SUITE).

-export([all/0, suite/0]).
-export([wrap_1/1]).

-export([loop_ref/1]).

-include_lib("common_test/include/ct.hrl").

suite() ->
    [{ct_hooks,[ts_install_cth]},
     {timetrap, {minutes, 2}}].

all() -> 
    [wrap_1].

wrap_1(doc) -> "Check that refs don't wrap around easily.";
wrap_1(Config) when is_list(Config) ->
    ?line spawn_link(?MODULE, loop_ref, [self()]),
    ?line receive
	      done ->
		  ct:fail(wrapfast)
	  after 30000 ->
		  ok
	  end,
    ok.

loop_ref(Parent) ->
    Ref0 = make_ref(),
    loop_ref(Ref0, first, 0),
    Parent ! done.

loop_ref(R, R, _) -> ok;
loop_ref(R0, _, N) ->
    loop_ref(R0, make_ref(), N+1).