The R13B03 release.OTP_R13B03

1 files changed, 58 insertions, 0 deletions

diff --git a/erts/emulator/test/ref_SUITE.erl b/erts/emulator/test/ref_SUITE.erl
new file mode 100644
index 0000000000..fa77095efd
--- /dev/null
+++ b/erts/emulator/test/ref_SUITE.erl
@@ -0,0 +1,58 @@
+%%
+%% %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).