From 2b99ed6fd9cf84c405f426ea0914b233b1f40ef1 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sat, 2 Oct 2010 03:23:17 +0200
Subject: Replaced ephraim_config code by gen_server behaviour

---
 src/core/ephraim.erl        |  7 +-----
 src/core/ephraim_config.erl | 59 ++++++++++++++++++++++++---------------------
 2 files changed, 32 insertions(+), 34 deletions(-)

diff --git a/src/core/ephraim.erl b/src/core/ephraim.erl
index c59be72..61387a5 100644
--- a/src/core/ephraim.erl
+++ b/src/core/ephraim.erl
@@ -24,12 +24,7 @@ stop() ->
 init() ->
     register(ephraim, self()),
     
-    Config = spawn(ephraim_config, init, []),
-    % Wait for config process
-    receive
-	{Config, started} ->
-	    io:format("Reading config file...~n")
-    end,
+    ephraim_config:start_link(),
     
     GUI = spawn(ephraim_gui, init, []),
     Conn = spawn(ephraim_conn, init, []),
diff --git a/src/core/ephraim_config.erl b/src/core/ephraim_config.erl
index 6c49351..6c556c2 100644
--- a/src/core/ephraim_config.erl
+++ b/src/core/ephraim_config.erl
@@ -1,15 +1,20 @@
 -module(ephraim_config).
--compile([debug_info, export_all]).
+-behaviour(gen_server).
 
--spec init() -> ok.
-init() ->
-    register(ephraim_config, self()),
-    ephraim ! {self(), started},
-    
+-export([start_link/0]).
+-export([get/1]).
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
+
+-spec start_link() -> {ok, pid()}.
+start_link() ->
+    gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
+
+-spec init(term()) -> {ok, dict()}.
+init(_Args) ->
     {ok, Terms} = file:consult(config_path() ++ "/ephraim.cfg"),
     Config = dict:from_list(lists:map(fun(Term) -> {element(1, Term), Term} end, Terms)),
     
-    loop(Config).
+    {ok, Config}.
 
 
 -spec config_path() -> string().
@@ -28,28 +33,26 @@ config_path() ->
     end,
     Path.
 
-
 -spec get(atom()) -> tuple() | error.
 get(Key) ->
+    gen_server:call(?MODULE, {get, Key}).
+
+
+-spec handle_call(term(), {pid(), term()}, dict()) -> {reply, tuple() | error, dict()}.
+handle_call({get, Key}, _From, Config) ->
     ephraim_config ! {self(), get, Key},
-    receive
-	{config, ok, Key, Value} ->
-	    Value;
-	{config, error, Key} ->
-	    error
-    end.
-	
--spec loop(dict()) -> ok.
-loop(Config) ->
-    receive
-	stop ->
-	    ok;
-	{From, get, Key} ->
-	    case dict:find(Key, Config) of
-		{ok, Value} ->
-		    From ! {config, ok, Key, Value};
-		error ->
-		    From ! {config, error, Key}
-	    end,
-	    loop(Config)
+    case dict:find(Key, Config) of
+	{ok, Value} ->
+	    {reply, Value, Config};
+	error ->
+	    {reply, error, Config}
     end.
+
+handle_cast(_Msg, Config) ->
+    {noreply, Config}.
+handle_info(_Msg, Config) ->
+    {noreply, Config}.
+terminate(_Reason, _Config) ->
+    ok.
+code_change(_OldVersion, Config, _Extra) ->
+    {ok, Config}.
-- 
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