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-rw-r--r--lib/stdlib/src/gen.erl119
1 files changed, 97 insertions, 22 deletions
diff --git a/lib/stdlib/src/gen.erl b/lib/stdlib/src/gen.erl
index 9811a211ae..597830cf9a 100644
--- a/lib/stdlib/src/gen.erl
+++ b/lib/stdlib/src/gen.erl
@@ -26,7 +26,8 @@
%%%
%%% The standard behaviour should export init_it/6.
%%%-----------------------------------------------------------------
--export([start/5, start/6, debug_options/1,
+-export([start/5, start/6, debug_options/2,
+ name/1, unregister_name/1, get_proc_name/1, get_parent/0,
call/3, call/4, reply/2, stop/1, stop/3]).
-export([init_it/6, init_it/7]).
@@ -124,7 +125,7 @@ init_it(GenMod, Starter, Parent, Mod, Args, Options) ->
init_it2(GenMod, Starter, Parent, self(), Mod, Args, Options).
init_it(GenMod, Starter, Parent, Name, Mod, Args, Options) ->
- case name_register(Name) of
+ case register_name(Name) of
true ->
init_it2(GenMod, Starter, Parent, Name, Mod, Args, Options);
{false, Pid} ->
@@ -297,19 +298,19 @@ where({global, Name}) -> global:whereis_name(Name);
where({via, Module, Name}) -> Module:whereis_name(Name);
where({local, Name}) -> whereis(Name).
-name_register({local, Name} = LN) ->
+register_name({local, Name} = LN) ->
try register(Name, self()) of
true -> true
catch
error:_ ->
{false, where(LN)}
end;
-name_register({global, Name} = GN) ->
+register_name({global, Name} = GN) ->
case global:register_name(Name, self()) of
yes -> true;
no -> {false, where(GN)}
end;
-name_register({via, Module, Name} = GN) ->
+register_name({via, Module, Name} = GN) ->
case Module:register_name(Name, self()) of
yes ->
true;
@@ -317,34 +318,108 @@ name_register({via, Module, Name} = GN) ->
{false, where(GN)}
end.
+name({local,Name}) -> Name;
+name({global,Name}) -> Name;
+name({via,_, Name}) -> Name;
+name(Pid) when is_pid(Pid) -> Pid.
+
+unregister_name({local,Name}) ->
+ try unregister(Name) of
+ _ -> ok
+ catch
+ _:_ -> ok
+ end;
+unregister_name({global,Name}) ->
+ _ = global:unregister_name(Name),
+ ok;
+unregister_name({via, Mod, Name}) ->
+ _ = Mod:unregister_name(Name),
+ ok;
+unregister_name(Pid) when is_pid(Pid) ->
+ ok.
+
+get_proc_name(Pid) when is_pid(Pid) ->
+ Pid;
+get_proc_name({local, Name}) ->
+ case process_info(self(), registered_name) of
+ {registered_name, Name} ->
+ Name;
+ {registered_name, _Name} ->
+ exit(process_not_registered);
+ [] ->
+ exit(process_not_registered)
+ end;
+get_proc_name({global, Name}) ->
+ case global:whereis_name(Name) of
+ undefined ->
+ exit(process_not_registered_globally);
+ Pid when Pid =:= self() ->
+ Name;
+ _Pid ->
+ exit(process_not_registered_globally)
+ end;
+get_proc_name({via, Mod, Name}) ->
+ case Mod:whereis_name(Name) of
+ undefined ->
+ exit({process_not_registered_via, Mod});
+ Pid when Pid =:= self() ->
+ Name;
+ _Pid ->
+ exit({process_not_registered_via, Mod})
+ end.
+
+get_parent() ->
+ case get('$ancestors') of
+ [Parent | _] when is_pid(Parent) ->
+ Parent;
+ [Parent | _] when is_atom(Parent) ->
+ name_to_pid(Parent);
+ _ ->
+ exit(process_was_not_started_by_proc_lib)
+ end.
+
+name_to_pid(Name) ->
+ case whereis(Name) of
+ undefined ->
+ case global:whereis_name(Name) of
+ undefined ->
+ exit(could_not_find_registered_name);
+ Pid ->
+ Pid
+ end;
+ Pid ->
+ Pid
+ end.
+
timeout(Options) ->
- case opt(timeout, Options) of
- {ok, Time} ->
+ case lists:keyfind(timeout, 1, Options) of
+ {_,Time} ->
Time;
- _ ->
+ false ->
infinity
end.
spawn_opts(Options) ->
- case opt(spawn_opt, Options) of
- {ok, Opts} ->
+ case lists:keyfind(spawn_opt, 1, Options) of
+ {_,Opts} ->
Opts;
- _ ->
+ false ->
[]
end.
-opt(Op, [{Op, Value}|_]) ->
- {ok, Value};
-opt(Op, [_|Options]) ->
- opt(Op, Options);
-opt(_, []) ->
- false.
-
-debug_options(Opts) ->
- case opt(debug, Opts) of
- {ok, Options} -> sys:debug_options(Options);
- _ -> []
+debug_options(Name, Opts) ->
+ case lists:keyfind(debug, 1, Opts) of
+ {_,Options} ->
+ try sys:debug_options(Options)
+ catch _:_ ->
+ error_logger:format(
+ "~p: ignoring erroneous debug options - ~p~n",
+ [Name,Options]),
+ []
+ end;
+ false ->
+ []
end.
format_status_header(TagLine, Pid) when is_pid(Pid) ->