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authorPeter Andersson <[email protected]>2016-10-17 14:52:59 +0200
committerPeter Andersson <[email protected]>2016-10-24 11:35:27 +0200
commit349c39e875e0af1bf42dcbc171a47d824401840e (patch)
treeb1e73edc9b7618e2f0109d997a300608cde38a3b /lib/common_test/src/ct_default_gl.erl
parent1550204bed17ecdcc59a53332bcdfa2ba246944a (diff)
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Fix problem with printouts to incorrect parent group leader
Diffstat (limited to 'lib/common_test/src/ct_default_gl.erl')
-rw-r--r--lib/common_test/src/ct_default_gl.erl83
1 files changed, 83 insertions, 0 deletions
diff --git a/lib/common_test/src/ct_default_gl.erl b/lib/common_test/src/ct_default_gl.erl
new file mode 100644
index 0000000000..d1b52e5f4f
--- /dev/null
+++ b/lib/common_test/src/ct_default_gl.erl
@@ -0,0 +1,83 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2012-2016. 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(ct_default_gl).
+-export([start_link/1, stop/0]).
+
+-export([init/1,handle_call/3,handle_cast/2,handle_info/2,terminate/2]).
+
+%% start_link()
+%% Start a new group leader process.
+start_link(ParentGL) ->
+ do_start(ParentGL, 3).
+
+do_start(_ParentGL, 0) ->
+ exit({?MODULE,startup});
+do_start(ParentGL, Retries) ->
+ case whereis(?MODULE) of
+ undefined ->
+ case gen_server:start_link(?MODULE, [ParentGL], []) of
+ {ok,Pid} ->
+ {ok,Pid};
+ Other ->
+ Other
+ end;
+ Pid ->
+ exit(Pid, kill),
+ timer:sleep(1000),
+ do_start(ParentGL, Retries-1)
+ end.
+
+%% stop(Pid)
+%% Stop a group leader process.
+stop() ->
+ gen_server:cast(whereis(?MODULE), stop).
+
+
+%%% Internal functions.
+
+init([ParentGL]) ->
+ register(?MODULE, self()),
+ {ok,#{parent_gl_pid => ParentGL,
+ parent_gl_monitor => erlang:monitor(process,ParentGL)}}.
+
+handle_cast(stop, St) ->
+ {stop,normal,St}.
+
+%% If the parent group leader dies, fall back on using the local user process
+handle_info({'DOWN',Ref,process,_,_Reason}, #{parent_gl_monitor := Ref} = St) ->
+ User = whereis(user),
+ {noreply,St#{parent_gl_pid => User,
+ parent_gl_monitor => erlang:monitor(process,User)}};
+
+handle_info({io_request,_From,_ReplyAs,_Req} = IoReq,
+ #{parent_gl_pid := ParentGL} = St) ->
+ ParentGL ! IoReq,
+ {noreply,St};
+
+handle_info(Msg, St) ->
+ io:format(user, "Common Test Group Leader process got: ~tp~n", [Msg]),
+ {noreply,St}.
+
+handle_call(_Req, _From, St) ->
+ {reply,ok,St}.
+
+terminate(_, _) ->
+ ok.