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authorJosé Valim <jose.valim@plataformatec.com.br>2014-08-13 20:25:32 +0200
committerJosé Valim <jose.valim@plataformatec.com.br>2014-09-11 10:49:00 +0200
commit2e78c5f3e7f9991484ceb5d56e5b0086331101be (patch)
treedaceedade1ff6fb0b5b9681517a57804ba0e17df /lib/stdlib/src
parentd54ef284388e4e5148be8de51ba2f9ebc2e3285e (diff)
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Do not rely on macros with implicit vars
This commit also provides the benefit that the Label argument in gen:call/3 is no longer used, as we can access the sender in the From argument. Therefore, we should be able to change the Label to something more relevant in the future.
Diffstat (limited to 'lib/stdlib/src')
-rw-r--r--lib/stdlib/src/gen_event.erl45
1 files changed, 23 insertions, 22 deletions
diff --git a/lib/stdlib/src/gen_event.erl b/lib/stdlib/src/gen_event.erl
index d39dd89d3a..40c5a93d59 100644
--- a/lib/stdlib/src/gen_event.erl
+++ b/lib/stdlib/src/gen_event.erl
@@ -49,8 +49,6 @@
-import(error_logger, [error_msg/2]).
--define(reply(X), From ! {element(2,Tag), X}).
-
-record(handler, {module :: atom(),
id = false,
state,
@@ -249,49 +247,49 @@ handle_msg(Msg, Parent, ServerName, MSL, Debug) ->
{notify, Event} ->
{Hib,MSL1} = server_notify(Event, handle_event, MSL, ServerName),
loop(Parent, ServerName, MSL1, Debug, Hib);
- {From, Tag, {sync_notify, Event}} ->
+ {_From, Tag, {sync_notify, Event}} ->
{Hib, MSL1} = server_notify(Event, handle_event, MSL, ServerName),
- ?reply(ok),
+ reply(Tag, ok),
loop(Parent, ServerName, MSL1, Debug, Hib);
{'EXIT', From, Reason} ->
MSL1 = handle_exit(From, Reason, MSL, ServerName),
loop(Parent, ServerName, MSL1, Debug, false);
- {From, Tag, {call, Handler, Query}} ->
+ {_From, Tag, {call, Handler, Query}} ->
{Hib, Reply, MSL1} = server_call(Handler, Query, MSL, ServerName),
- ?reply(Reply),
+ reply(Tag, Reply),
loop(Parent, ServerName, MSL1, Debug, Hib);
- {From, Tag, {add_handler, Handler, Args}} ->
+ {_From, Tag, {add_handler, Handler, Args}} ->
{Hib, Reply, MSL1} = server_add_handler(Handler, Args, MSL),
- ?reply(Reply),
+ reply(Tag, Reply),
loop(Parent, ServerName, MSL1, Debug, Hib);
- {From, Tag, {add_sup_handler, Handler, Args, SupP}} ->
+ {_From, Tag, {add_sup_handler, Handler, Args, SupP}} ->
{Hib, Reply, MSL1} = server_add_sup_handler(Handler, Args, MSL, SupP),
- ?reply(Reply),
+ reply(Tag, Reply),
loop(Parent, ServerName, MSL1, Debug, Hib);
- {From, Tag, {delete_handler, Handler, Args}} ->
+ {_From, Tag, {delete_handler, Handler, Args}} ->
{Reply, MSL1} = server_delete_handler(Handler, Args, MSL,
ServerName),
- ?reply(Reply),
+ reply(Tag, Reply),
loop(Parent, ServerName, MSL1, Debug, false);
- {From, Tag, {swap_handler, Handler1, Args1, Handler2, Args2}} ->
+ {_From, Tag, {swap_handler, Handler1, Args1, Handler2, Args2}} ->
{Hib, Reply, MSL1} = server_swap_handler(Handler1, Args1, Handler2,
Args2, MSL, ServerName),
- ?reply(Reply),
+ reply(Tag, Reply),
loop(Parent, ServerName, MSL1, Debug, Hib);
- {From, Tag, {swap_sup_handler, Handler1, Args1, Handler2, Args2,
+ {_From, Tag, {swap_sup_handler, Handler1, Args1, Handler2, Args2,
Sup}} ->
{Hib, Reply, MSL1} = server_swap_handler(Handler1, Args1, Handler2,
Args2, MSL, Sup, ServerName),
- ?reply(Reply),
+ reply(Tag, Reply),
loop(Parent, ServerName, MSL1, Debug, Hib);
- {From, Tag, stop} ->
+ {_From, Tag, stop} ->
catch terminate_server(normal, Parent, MSL, ServerName),
- ?reply(ok);
- {From, Tag, which_handlers} ->
- ?reply(the_handlers(MSL)),
+ reply(Tag, ok);
+ {_From, Tag, which_handlers} ->
+ reply(Tag, the_handlers(MSL)),
loop(Parent, ServerName, MSL, Debug, false);
- {From, Tag, get_modules} ->
- ?reply(get_modules(MSL)),
+ {_From, Tag, get_modules} ->
+ reply(Tag, get_modules(MSL)),
loop(Parent, ServerName, MSL, Debug, false);
Other ->
{Hib, MSL1} = server_notify(Other, handle_info, MSL, ServerName),
@@ -303,6 +301,9 @@ terminate_server(Reason, Parent, MSL, ServerName) ->
do_unlink(Parent, MSL),
exit(Reason).
+reply({From, Ref}, Msg) ->
+ From ! {Ref, Msg}.
+
%% unlink the supervisor process of all supervised handlers.
%% We do not want a handler supervisor to EXIT due to the
%% termination of the event manager (server).