diff options
Diffstat (limited to 'lib/stdlib/src/gen_statem.erl')
| -rw-r--r-- | lib/stdlib/src/gen_statem.erl | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/lib/stdlib/src/gen_statem.erl b/lib/stdlib/src/gen_statem.erl index 8f058cc3a8..29848d13a3 100644 --- a/lib/stdlib/src/gen_statem.erl +++ b/lib/stdlib/src/gen_statem.erl @@ -249,7 +249,7 @@ callback_mode(CallbackMode) -> false end. %% -caller({Pid,Tag}) when is_pid(Pid), is_reference(Tag) -> +caller({Pid,_}) when is_pid(Pid) -> true; caller(_) -> false. @@ -279,7 +279,7 @@ event_type(Type) -> -define( TERMINATE(Class, Reason, Debug, S, Q), terminate( - Class, + begin Class end, begin Reason end, ?STACKTRACE(), begin Debug end, @@ -355,23 +355,23 @@ stop(ServerRef, Reason, Timeout) -> %% Send an event to a state machine that arrives with type 'event' -spec cast(ServerRef :: server_ref(), Msg :: term()) -> ok. cast({global,Name}, Msg) -> - try global:send(Name, cast(Msg)) of + try global:send(Name, wrap_cast(Msg)) of _ -> ok catch _:_ -> ok end; cast({via,RegMod,Name}, Msg) -> - try RegMod:send(Name, cast(Msg)) of + try RegMod:send(Name, wrap_cast(Msg)) of _ -> ok catch _:_ -> ok end; cast({Name,Node} = ServerRef, Msg) when is_atom(Name), is_atom(Node) -> - do_send(ServerRef, cast(Msg)); + send(ServerRef, wrap_cast(Msg)); cast(ServerRef, Msg) when is_atom(ServerRef) -> - do_send(ServerRef, cast(Msg)); + send(ServerRef, wrap_cast(Msg)); cast(ServerRef, Msg) when is_pid(ServerRef) -> - do_send(ServerRef, cast(Msg)). + send(ServerRef, wrap_cast(Msg)). %% Call a state machine (synchronous; a reply is expected) that %% arrives with type {call,Caller} @@ -425,7 +425,7 @@ call(ServerRef, Request, Timeout) -> {Reason,{?MODULE,call,[ServerRef,Request,Timeout]}}, Stacktrace); {'DOWN',Mref,_,_,Reason} -> - %% There is just a theoretical possibility that the + %% There is a theoretical possibility that the %% proxy process gets killed between try--of and ! %% so this clause is in case of that exit(Reason) @@ -433,14 +433,13 @@ call(ServerRef, Request, Timeout) -> %% Reply from a state machine callback to whom awaits in call/2 -spec reply([reply_action()] | reply_action()) -> ok. -reply({reply,{_To,_Tag}=Caller,Reply}) -> +reply({reply,Caller,Reply}) -> reply(Caller, Reply); reply(Replies) when is_list(Replies) -> - [reply(Reply) || Reply <- Replies], - ok. + replies(Replies). %% -spec reply(Caller :: caller(), Reply :: term()) -> ok. -reply({To,Tag}, Reply) -> +reply({To,Tag}, Reply) when is_pid(To) -> Msg = {Tag,Reply}, try To ! Msg of _ -> @@ -503,11 +502,17 @@ enter_loop(Module, Opts, CallbackMode, State, Data, Server, Actions) -> %%--------------------------------------------------------------------------- %% API helpers -cast(Event) -> +wrap_cast(Event) -> {'$gen_cast',Event}. +replies([{reply,Caller,Reply}|Replies]) -> + reply(Caller, Reply), + replies(Replies); +replies([]) -> + ok. + %% Might actually not send the message in case of caught exception -do_send(Proc, Msg) -> +send(Proc, Msg) -> try erlang:send(Proc, Msg, [noconnect]) of noconnect -> _ = spawn(erlang, send, [Proc,Msg]), @@ -723,20 +728,17 @@ wakeup_from_hibernate(Parent, Debug, S) -> loop(Parent, Debug, #{hibernate := Hib} = S) -> case Hib of true -> - loop_hibernate(Parent, Debug, S); + %% Does not return but restarts process at + %% wakeup_from_hibernate/3 that jumps to loop_receive/3 + proc_lib:hibernate( + ?MODULE, wakeup_from_hibernate, [Parent,Debug,S]), + error( + {should_not_have_arrived_here_but_instead_in, + {wakeup_from_hibernate,3}}); false -> loop_receive(Parent, Debug, S) end. -loop_hibernate(Parent, Debug, S) -> - %% Does not return but restarts process at - %% wakeup_from_hibernate/3 that jumps to loop_receive/3 - proc_lib:hibernate( - ?MODULE, wakeup_from_hibernate, [Parent,Debug,S]), - error( - {should_not_have_arrived_here_but_instead_in, - {wakeup_from_hibernate,3}}). - %% Entry point for wakeup_from_hibernate/3 loop_receive(Parent, Debug, #{timer := Timer} = S) -> receive @@ -754,7 +756,7 @@ loop_receive(Parent, Debug, #{timer := Timer} = S) -> %% but this will stand out in the crash report... ?TERMINATE(exit, Reason, Debug, S, [EXIT]); {timeout,Timer,Content} when Timer =/= undefined -> - loop_receive( + loop_event( Parent, Debug, S, {timeout,Content}, undefined); _ -> Event = @@ -766,11 +768,11 @@ loop_receive(Parent, Debug, #{timer := Timer} = S) -> _ -> {info,Msg} end, - loop_receive(Parent, Debug, S, Event, Timer) + loop_event(Parent, Debug, S, Event, Timer) end end. -loop_receive(Parent, Debug, S, Event, Timer) -> +loop_event(Parent, Debug, S, Event, Timer) -> NewDebug = sys_debug(Debug, S, {in,Event}), %% Here the queue of not yet processed events is created loop_events(Parent, NewDebug, S, [Event], Timer). |