%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2010. 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%
%%%-------------------------------------------------------------------
%%% File : wxe_server.erl
%%% Author : Dan Gudmundsson <[email protected]>
%%% Description :
%%%
%%% Created : 17 Jan 2007 by Dan Gudmundsson <[email protected]>
%%%-------------------------------------------------------------------
%% @hidden
-module(wxe_master).
-behaviour(gen_server).
%% API
-export([start/0, init_port/0, init_opengl/0]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {cb_port, %% Callback port and to erlang messages goes via it.
users, %% List of wx servers, needed ??
driver}). %% Driver name so wx_server can create it's own port
-include("wxe.hrl").
-include("gen/wxe_debug.hrl").
-define(DRIVER, "wxe_driver").
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}
%% Description: Starts the server
%%--------------------------------------------------------------------
start() ->
gen_server:start({local, ?MODULE}, ?MODULE, [], []).
%%--------------------------------------------------------------------
%% Function: init_port() -> {UserPort,CallBackPort} | error(Error)
%% Description: Creates the port
%%--------------------------------------------------------------------
init_port() ->
case whereis(?MODULE) of
undefined ->
case start() of
{ok,Pid} -> Pid;
{error,{already_started,Pid}} -> Pid;
{error, {Reason,Stack}} ->
erlang:raise(error, Reason, Stack)
end;
Pid ->
Pid
end,
{Driver, CBport} = gen_server:call(?MODULE, init_port, infinity),
Port = open_port({spawn,Driver},[binary]),
receive wx_port_initiated -> ok end,
{Port, CBport}.
%%--------------------------------------------------------------------
%% Initlizes the opengl library
%%--------------------------------------------------------------------
init_opengl() ->
GLLib = wxe_util:wxgl_dl(),
wxe_util:call(?WXE_INIT_OPENGL, <<(list_to_binary(GLLib))/binary, 0:8>>).
%%====================================================================
%% gen_server callbacks
%%====================================================================
%%--------------------------------------------------------------------
%% Function: init(Args) -> {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%% Description: Initiates the server
%%--------------------------------------------------------------------
init([]) ->
DriverName = ?DRIVER,
PrivDir = wxe_util:priv_dir(?DRIVER),
erlang:group_leader(whereis(init), self()),
case catch erlang:system_info(smp_support) of
true -> ok;
_ ->
error_logger:format("WX ERROR: SMP emulator required", []),
erlang:error(not_smp)
end,
case catch (erlang:system_info(version) >= "5.6.2") of
true -> ok;
_ -> %% Needs to be able to disable FPU exceptions.
error_logger:format("WX ERROR: OTP R12B-2 or Emulator >= 5.6.2 required", []),
erlang:error(wrong_version)
end,
%% io:format("Loading ~p @ ~p ~n", [DriverName,PrivDir]),
case os:type() of
{win32,_} -> %% Needed for mingwm10.dll
Path = os:getenv("PATH"),
os:putenv("PATH", PrivDir ++ ";" ++ Path);
_ -> ok
end,
case erl_ddll:load_driver(PrivDir,DriverName) of
ok -> ok;
{error, What} ->
error_logger:format("WX Failed loading ~p@~p ~n", [DriverName,PrivDir]),
Str = erl_ddll:format_error(What),
erlang:error({load_driver,Str})
end,
process_flag(trap_exit, true),
DriverWithArgs = DriverName ++ " " ++ code:priv_dir(wx) ++ [0],
case catch open_port({spawn, DriverWithArgs},[binary]) of
{'EXIT', Err} ->
erlang:error({open_port,Err});
Port ->
wx_debug_info = ets:new(wx_debug_info, [named_table]),
wx_non_consts = ets:new(wx_non_consts, [named_table]),
true = ets:insert(wx_debug_info, wxdebug_table()),
spawn_link(fun() -> debug_ping(Port) end),
receive
{wx_consts, List} ->
true = ets:insert(wx_non_consts, List)
end,
{ok, #state{cb_port=Port, driver=DriverName, users=gb_sets:empty()}}
end.
%%--------------------------------------------------------------------
%% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} |
%% {stop, Reason, State}
%% Description: Handling call messages
%%--------------------------------------------------------------------
handle_call(init_port, From, State=#state{driver=Driver,cb_port=CBPort, users=Users}) ->
{reply, {Driver,CBPort}, State#state{users=gb_sets:add(From,Users)}};
handle_call(_Request, _From, State) ->
%%io:format("Unknown request ~p sent to ~p from ~p ~n",[_Request, ?MODULE, _From]),
Reply = ok,
{reply, Reply, State}.
%%--------------------------------------------------------------------
%% Function: handle_cast(Msg, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling cast messages
%%--------------------------------------------------------------------
handle_cast(_Msg, State) ->
%%io:format("Unknown message ~p sent to ~p~n",[_Msg, ?MODULE]),
{noreply, State}.
%%--------------------------------------------------------------------
%% Function: handle_info(Info, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling all non call/cast messages
%%--------------------------------------------------------------------
handle_info({wxe_driver, error, Msg}, State) ->
error_logger:format("WX ERROR: ~s~n", [Msg]),
{noreply, State};
handle_info({wxe_driver, internal_error, Msg}, State) ->
error_logger:format("WX INTERNAL ERROR: ~s~n", [Msg]),
{noreply, State};
handle_info({wxe_driver, debug, Msg}, State) ->
io:format("WX DBG: ~s~n", [Msg]),
{noreply, State};
handle_info(_Info, State) ->
io:format("Unknown message ~p sent to ~p~n",[_Info, ?MODULE]),
{noreply, State}.
%%--------------------------------------------------------------------
%% Function: terminate(Reason, State) -> void()
%% Description: This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any necessary
%% cleaning up. When it returns, the gen_server terminates with Reason.
%% The return value is ignored.
%%--------------------------------------------------------------------
terminate(_Reason, _State) ->
erlang:display({?MODULE, killed, process_info(self(),trap_exit),_Reason}),
ok.
%%--------------------------------------------------------------------
%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}
%% Description: Convert process state when code is changed
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
%%%%%%%%%%%% INTERNAL %%%%%%%%%%%%%%%%%%%%%%%%
debug_ping(Port) ->
timer:sleep(1*333),
_R = (catch erlang:port_call(Port, 0, [])),
%% io:format("Erlang ping ~p ~n", [_R]),
debug_ping(Port).
