1 files changed, 108 insertions, 0 deletions
diff --git a/lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_driver_handler.erl b/lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_driver_handler.erl
new file mode 100644
index 0000000000..7a986b5376
--- /dev/null
+++ b/lib/dialyzer/test/r9c_tests_SUITE_data/src/asn1/asn1rt_driver_handler.erl
@@ -0,0 +1,108 @@
+%% ``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 via the world wide web 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.
+%% 
+%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+%% AB. All Rights Reserved.''
+%% 
+%%     $Id: asn1rt_driver_handler.erl,v 1.1 2008/12/17 09:53:30 mikpe Exp $
+%%
+
+-module(asn1rt_driver_handler).
+
+-export([init/1,load_driver/0,unload_driver/0]).
+
+
+load_driver() ->
+    spawn(asn1rt_driver_handler, init, [self()]).
+
+init(From) ->
+    Port=
+	case load_driver("asn1_erl_drv") of
+	    ok ->
+		open_named_port(From);
+	    already_done ->
+		From ! driver_ready;
+	    Error -> % if erl_ddll:load_driver fails
+		erl_ddll:unload_driver("asn1_erl_drv"),
+		From ! Error
+	end,
+    register_and_loop(Port).
+
+load_driver(DriverName) ->
+    case is_driver_loaded(DriverName) of
+	false ->
+	    Dir = filename:join([code:priv_dir(asn1),"lib"]),
+	    erl_ddll:load_driver(Dir,DriverName);
+	true ->
+	    ok
+    end.
+
+		    
+is_driver_loaded(_Name) ->
+    case whereis(asn1_driver_owner) of
+	undefined ->
+	    false;
+	_ ->
+	    true
+    end.
+
+open_named_port(From) ->
+    case is_port_open(drv_complete) of
+	false ->
+	    case catch open_port({spawn,"asn1_erl_drv"},[]) of
+		{'EXIT',Reason} ->
+		    From ! {port_error,Reason};
+		Port ->
+		    register(drv_complete,Port),
+		    From ! driver_ready,
+		    Port
+	    end;
+	_ ->
+	    From ! driver_ready,
+	    ok
+    end.
+
+is_port_open(Name) ->
+    case whereis(Name) of
+	Port when port(Port) ->
+	    true;
+	_ -> false
+    end.
+
+register_and_loop(Port) when port(Port) ->
+    register(asn1_driver_owner,self()),
+    loop();
+register_and_loop(_) ->
+    ok.
+
+loop() ->
+    receive
+	unload ->
+	    case whereis(drv_complete) of
+		Port when port(Port) ->
+		    port_close(Port);
+		_ -> ok
+	    end,
+	    erl_ddll:unload_driver("asn1_erl_drv"),
+	    ok;
+	_ ->
+	    loop()
+    end.
+
+unload_driver() ->
+    case whereis(asn1_driver_owner) of
+	Pid when pid(Pid) ->
+	    Pid ! unload,
+	    ok;
+	_ -> 
+	    ok
+    end.