From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 lib/mnesia/src/mnesia_sup.erl | 131 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 lib/mnesia/src/mnesia_sup.erl

(limited to 'lib/mnesia/src/mnesia_sup.erl')

diff --git a/lib/mnesia/src/mnesia_sup.erl b/lib/mnesia/src/mnesia_sup.erl
new file mode 100644
index 0000000000..9ee4086f50
--- /dev/null
+++ b/lib/mnesia/src/mnesia_sup.erl
@@ -0,0 +1,131 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 1996-2009. 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%
+%%
+
+%%
+%% Supervisor for the entire Mnesia application
+
+-module(mnesia_sup).
+
+-behaviour(application).
+-behaviour(supervisor).
+
+-export([start/0, start/2, init/1, stop/1, start_event/0, kill/0]).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% application and suprvisor callback functions
+
+start(normal, Args) ->
+    SupName = {local,?MODULE},
+    case supervisor:start_link(SupName, ?MODULE, [Args]) of
+	{ok, Pid} ->
+	    {ok, Pid, {normal, Args}};
+	Error -> 
+	    Error
+    end;
+start(_, _) ->
+    {error, badarg}.
+
+start() ->
+    SupName = {local,?MODULE},
+    supervisor:start_link(SupName, ?MODULE, []).
+
+stop(_StartArgs) ->
+    ok.
+
+init([]) -> % Supervisor
+    init();
+init([[]]) -> % Application
+    init();
+init(BadArg) ->
+    {error, {badarg, BadArg}}.
+    
+init() ->
+    Flags = {one_for_all, 0, 3600}, % Should be rest_for_one policy
+
+    Event = event_procs(),
+    Kernel = kernel_procs(),
+    Mnemosyne = mnemosyne_procs(),
+
+    {ok, {Flags, Event ++ Kernel ++ Mnemosyne}}.
+
+event_procs() ->
+    KillAfter = timer:seconds(30),
+    KA = mnesia_kernel_sup:supervisor_timeout(KillAfter),
+    E = mnesia_event,
+    [{E, {?MODULE, start_event, []}, permanent, KA, worker, [E, gen_event]}].
+
+kernel_procs() ->
+    K = mnesia_kernel_sup,
+    KA = infinity,
+    [{K, {K, start, []}, permanent, KA, supervisor, [K, supervisor]}].
+
+mnemosyne_procs() ->
+    case mnesia_monitor:get_env(embedded_mnemosyne) of
+	true ->
+	    Q = mnemosyne_sup,
+	    KA = infinity,
+	    [{Q, {Q, start, []}, permanent, KA, supervisor, [Q, supervisor]}];
+	false ->
+	    []
+    end.
+    
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% event handler
+
+start_event() ->
+    case gen_event:start_link({local, mnesia_event}) of
+	{ok, Pid} ->
+	    case add_event_handler() of
+		ok -> 
+		    {ok, Pid};
+		Error ->
+		    Error
+	    end;
+	Error  ->
+	    Error
+    end.
+
+add_event_handler() ->
+    Handler = mnesia_monitor:get_env(event_module),
+    gen_event:add_handler(mnesia_event, Handler, []).
+    
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% debug functions
+
+kill() ->
+    Mnesia = [mnesia_fallback | mnesia:ms()],
+    Kill = fun(Name) -> catch exit(whereis(Name), kill) end,
+    lists:foreach(Kill, Mnesia),
+    lists:foreach(fun ensure_dead/1, Mnesia),
+    timer:sleep(10),
+    case lists:keymember(mnesia, 1, application:which_applications()) of
+	true -> kill();
+	false -> ok
+    end.
+
+ensure_dead(Name) ->
+    case whereis(Name) of
+	undefined ->
+	    ok;
+	Pid when is_pid(Pid) ->
+	    exit(Pid, kill),
+	    timer:sleep(10),
+	    ensure_dead(Name)
+    end.
+
-- 
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