From ddbe8a821ad57bfc2a1bcd29ed80ae8cfffe1c0e Mon Sep 17 00:00:00 2001
From: Dan Gudmundsson <dgud@erlang.org>
Date: Fri, 19 Dec 2014 09:58:42 +0100
Subject: wx: Do not crash server when going down
If a connect request was made during the takedown of wx it would crash.
---
lib/wx/src/wxe_server.erl | 14 +++++++++-----
lib/wx/test/wx_event_SUITE.erl | 8 +++++---
2 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/lib/wx/src/wxe_server.erl b/lib/wx/src/wxe_server.erl
index 465b9da2e0..8ef568c102 100644
--- a/lib/wx/src/wxe_server.erl
+++ b/lib/wx/src/wxe_server.erl
@@ -223,14 +223,18 @@ handle_connect(Object, #evh{handler=undefined, cb=Callback} = EvData0,
Error ->
{reply, Error, State0}
end;
-handle_connect(Object, EvData=#evh{handler=Handler},
+handle_connect(Object, EvData=#evh{handler=Handler},
From, State0 = #state{users=Users}) ->
%% Correct process is already listening just register it
put(Handler, From),
- User0 = #user{events=Listeners0} = gb_trees:get(From, Users),
- User = User0#user{events=[{Object,EvData}|Listeners0]},
- State = State0#state{users=gb_trees:update(From, User, Users)},
- {reply, ok, State}.
+ case gb_trees:get(From, Users) of
+ {value, User0 = #user{events=Listeners0}} ->
+ User = User0#user{events=[{Object,EvData}|Listeners0]},
+ State = State0#state{users=gb_trees:update(From, User, Users)},
+ {reply, ok, State};
+ none -> %% We are closing up the shop
+ {reply, {error, terminating}, State0}
+ end.
invoke_cb({{Ev=#wx{}, Ref=#wx_ref{}}, FunId,_}, _S) ->
%% Event callbacks
diff --git a/lib/wx/test/wx_event_SUITE.erl b/lib/wx/test/wx_event_SUITE.erl
index 076f16ba16..f9f8788d8f 100644
--- a/lib/wx/test/wx_event_SUITE.erl
+++ b/lib/wx/test/wx_event_SUITE.erl
@@ -336,12 +336,14 @@ connect_in_callback(Config) ->
end}]),
wxWindow:show(F1),
receive
- {continue, F1} -> Tester ! {continue, F1}
+ {continue, F1} ->
+ true = wxFrame:disconnect(F1, size),
+ Tester ! {continue, F1}
end
end,
- wxFrame:connect(Frame,size,
+ wxFrame:connect(Frame,show,
[{callback,
- fun(#wx{event=#wxSize{}},_SizeEv) ->
+ fun(#wx{event=#wxShow{}},_SizeEv) ->
io:format("Frame got size~n",[]),
spawn(TestWindow)
end}]),
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