Merge branch 'bjorn/kernel/clean-up-code_server'

* bjorn/kernel/clean-up-code_server:
  code_server: Add specs for all exported functions
  code_server: Add types to the state record
  code_server: Don't export internal system_* functions
  Simplify starting of code server
  Remove first argument of code_server:call()

3 files changed, 51 insertions, 76 deletions

diff --git a/lib/kernel/src/code.erl b/lib/kernel/src/code.erl
index a82fc0f3d6..59e226df43 100644
--- a/lib/kernel/src/code.erl
+++ b/lib/kernel/src/code.erl
@@ -60,7 +60,7 @@
 	 del_path/1,
 	 replace_path/2,
 	 rehash/0,
-	 start_link/0, start_link/1,
+	 start_link/0,
 	 which/1,
 	 where_is_file/1,
 	 where_is_file/2,
@@ -306,15 +306,11 @@ get_mode() -> call(get_mode).
 %%-----------------------------------------------------------------
 
 call(Req) ->
-    code_server:call(code_server, Req).
+    code_server:call(Req).
 
 -spec start_link() -> {'ok', pid()} | {'error', 'crash'}.
 start_link() ->
-    start_link([stick]).
-
--spec start_link(Flags :: [atom()]) -> {'ok', pid()} | {'error', 'crash'}.
-start_link(Flags) ->
-    do_start(Flags).
+    do_start().
     
 %%-----------------------------------------------------------------
 %% In the init phase, code must not use any modules not yet loaded,
@@ -326,36 +322,21 @@ start_link(Flags) ->
 %% us, so the module is loaded.
 %%-----------------------------------------------------------------
 
-do_start(Flags) ->
+do_start() ->
     maybe_warn_for_cache(),
     load_code_server_prerequisites(),
 
-    Mode = get_mode(Flags),
-    case init:get_argument(root) of 
-	{ok,[[Root0]]} ->
-	    Root = filename:join([Root0]), % Normalize.  Use filename
-	    case code_server:start_link([Root,Mode]) of
-		{ok,_Pid} = Ok2 ->
-		    if
-			Mode =:= interactive ->
-			    case lists:member(stick, Flags) of
-				true -> do_stick_dirs();
-				_    -> ok
-			    end;
-			true ->
-			    ok
-		    end,
-		    %% Quietly load native code for all modules loaded so far
-                    Architecture = erlang:system_info(hipe_architecture),
-		    load_native_code_for_all_loaded(Architecture),
-		    Ok2;
-		Other ->
-		    Other
-	    end;
-	Other ->
-	    error_logger:error_msg("Can not start code server ~w ~n", [Other]),
-	    {error, crash}
-    end.
+    {ok,[[Root0]]} = init:get_argument(root),
+    Mode = start_get_mode(),
+    Root = filename:join([Root0]),	    % Normalize.
+    Res = code_server:start_link([Root,Mode]),
+
+    maybe_stick_dirs(Mode),
+
+    %% Quietly load native code for all modules loaded so far.
+    Architecture = erlang:system_info(hipe_architecture),
+    load_native_code_for_all_loaded(Architecture),
+    Res.
 
 %% Make sure that all modules that the code_server process calls
 %% (directly or indirectly) are loaded. Otherwise the code_server
@@ -375,6 +356,16 @@ load_code_server_prerequisites() ->
     _ = [M = M:module_info(module) || M <- Needed],
     ok.
 
+maybe_stick_dirs(interactive) ->
+    case init:get_argument(nostick) of
+	{ok,[[]]} ->
+	    ok;
+	_ ->
+	    do_stick_dirs()
+    end;
+maybe_stick_dirs(_) ->
+    ok.
+
 do_stick_dirs() ->
     do_s(compiler),
     do_s(stdlib),
@@ -392,19 +383,12 @@ do_s(Lib) ->
 	    ok
     end.
 
-get_mode(Flags) ->
-    case lists:member(embedded, Flags) of
-	true ->
+start_get_mode() ->
+    case init:get_argument(mode) of
+	{ok,[["embedded"]]} ->
 	    embedded;
-	_Otherwise -> 
-	    case init:get_argument(mode) of
-		{ok,[["embedded"]]} ->
-		    embedded;
-		{ok,[["minimal"]]} ->
-		    minimal;
-		_Else ->
-		    interactive
-	    end
+	_ ->
+	    interactive
     end.
 
 %% Find out which version of a particular module we would
diff --git a/lib/kernel/src/code_server.erl b/lib/kernel/src/code_server.erl
index e72f8fd1b9..b52def8777 100644
--- a/lib/kernel/src/code_server.erl
+++ b/lib/kernel/src/code_server.erl
@@ -22,9 +22,7 @@
 %% This file holds the server part of the code_server.
 
 -export([start_link/1,
-	 call/2,
-	 system_continue/3, 
-	 system_terminate/4,
+	 call/1,
 	 system_code_change/4,
 	 error_msg/2, info_msg/2
 	]).
@@ -35,15 +33,18 @@
 
 -define(ANY_NATIVE_CODE_LOADED, any_native_code_loaded).
 
--record(state, {supervisor,
-		root,
-		path,
-		moddb,
-		namedb,
-		mode = interactive,
-		on_load = []}).
+-type on_load_item() :: {reference(),module(),file:name_all(),[pid()]}.
+
+-record(state, {supervisor :: pid(),
+		root :: file:name_all(),
+		path :: [file:name_all()],
+		moddb :: ets:tab(),
+		namedb :: ets:tab(),
+		mode = interactive :: 'interactive' | 'embedded',
+		on_load = [] :: [on_load_item()]}).
 -type state() :: #state{}.
 
+-spec start_link([term()]) -> {'ok', pid()}.
 start_link(Args) ->
     Ref = make_ref(),
     Parent = self(),
@@ -58,7 +59,7 @@ start_link(Args) ->
 %% Init the code_server process.
 %% -----------------------------------------------------------
 
-init(Ref, Parent, [Root,Mode0]) ->
+init(Ref, Parent, [Root,Mode]) ->
     register(?MODULE, self()),
     process_flag(trap_exit, true),
 
@@ -69,12 +70,6 @@ init(Ref, Parent, [Root,Mode0]) ->
 	    end, erlang:pre_loaded()),
     ets:insert(Db, init:fetch_loaded()),
 
-    Mode = 
-	case Mode0 of
-	    minimal -> interactive;
-	    _       -> Mode0
-	end,
-
     IPath =
 	case Mode of
 	    interactive ->
@@ -88,7 +83,8 @@ init(Ref, Parent, [Root,Mode0]) ->
 	end,
 
     Path = add_loader_path(IPath, Mode),
-    State = #state{root = Root,
+    State = #state{supervisor = Parent,
+		   root = Root,
 		   path = Path,
 		   moddb = Db,
 		   namedb = init_namedb(Path),
@@ -97,7 +93,7 @@ init(Ref, Parent, [Root,Mode0]) ->
     put(?ANY_NATIVE_CODE_LOADED, false),
 
     Parent ! {Ref,{ok,self()}},
-    loop(State#state{supervisor = Parent}).
+    loop(State).
 
 get_user_lib_dirs() ->
     case os:getenv("ERL_LIBS") of
@@ -133,8 +129,9 @@ split_paths([C|T], S, Path, Paths) ->
 split_paths([], _S, Path, Paths) ->
     lists:reverse(Paths, [lists:reverse(Path)]).
 
-call(Name, Req) ->
-    Name ! {code_call, self(), Req},
+-spec call(term()) -> term().
+call(Req) ->
+    ?MODULE ! {code_call, self(), Req},
     receive 
 	{?MODULE, Reply} ->
 	    Reply
@@ -1333,13 +1330,13 @@ strip_mod_info([{{sticky,_},_}|T], Acc) -> strip_mod_info(T, Acc);
 strip_mod_info([H|T], Acc)              -> strip_mod_info(T, [H|Acc]);
 strip_mod_info([], Acc)                 -> Acc.
 
-% error_msg(Format) ->
-%     error_msg(Format,[]).
+-spec error_msg(io:format(), [term()]) -> 'ok'.
 error_msg(Format, Args) ->
     Msg = {notify,{error, group_leader(), {self(), Format, Args}}},
     error_logger ! Msg,
     ok.
 
+-spec info_msg(io:format(), [term()]) -> 'ok'.
 info_msg(Format, Args) ->
     Msg = {notify,{info_msg, group_leader(), {self(), Format, Args}}},
     error_logger ! Msg,
diff --git a/lib/kernel/src/kernel.erl b/lib/kernel/src/kernel.erl
index 5f33f25a0d..40544da6c3 100644
--- a/lib/kernel/src/kernel.erl
+++ b/lib/kernel/src/kernel.erl
@@ -98,7 +98,7 @@ init([]) ->
 	      {kernel_config, start_link, []},
 	      permanent, 2000, worker, [kernel_config]},
     Code = {code_server,
-	    {code, start_link, get_code_args()},
+	    {code, start_link, []},
 	    permanent, 2000, worker, [code]},
     File = {file_server_2,
 	    {file_server, start_link, []},
@@ -158,12 +158,6 @@ init(safe) ->
 
     {ok, {SupFlags, Boot ++ DiskLog ++ Pg2}}.
 
-get_code_args() ->
-    case init:get_argument(nostick) of
-	{ok, [[]]} -> [[nostick]];
-	_ -> []
-    end.
-
 start_dist_ac() ->
     Spec = [{dist_ac,{dist_ac,start_link,[]},permanent,2000,worker,[dist_ac]}],
     case application:get_env(kernel, start_dist_ac) of