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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /erts/emulator/test/ref_SUITE.erl
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The R13B03 release.OTP_R13B03
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1999-2009. 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.
+%%
+%% %CopyrightEnd%
+%%
+
+-module(ref_SUITE).
+
+-export([all/1,init_per_testcase/2,fin_per_testcase/2]).
+-export([wrap_1/1]).
+
+-export([loop_ref/1]).
+
+-include("test_server.hrl").
+
+init_per_testcase(_, Config) ->
+ ?line Dog=test_server:timetrap(test_server:minutes(2)),
+ [{watchdog, Dog}|Config].
+
+fin_per_testcase(_, Config) ->
+ Dog=?config(watchdog, Config),
+ test_server:timetrap_cancel(Dog),
+ ok.
+
+all(suite) -> [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 ->
+ test_server: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).