diff options
Diffstat (limited to 'lib/kernel')
| -rw-r--r-- | lib/kernel/src/heart.erl | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/lib/kernel/src/heart.erl b/lib/kernel/src/heart.erl index 686e2e03ff..273bdcb352 100644 --- a/lib/kernel/src/heart.erl +++ b/lib/kernel/src/heart.erl @@ -37,6 +37,7 @@ -export([start/0, init/2, set_cmd/1, clear_cmd/0, get_cmd/0, set_callback/2, clear_callback/0, get_callback/0, + set_options/1, get_options/0, cycle/0]). -define(START_ACK, 1). @@ -54,6 +55,7 @@ -record(state,{port :: port(), cmd :: [] | binary(), + options :: [atom()], callback :: 'undefined' | {atom(), atom()}}). %%--------------------------------------------------------------------- @@ -92,7 +94,7 @@ init(Starter, Parent) -> case catch start_portprogram() of {ok, Port} -> Starter ! {ok, self()}, - loop(Parent, #state{port = Port, cmd = []}); + loop(Parent, #state{port=Port, cmd=[], options=[]}); no_heart -> Starter ! {no_heart, self()}; error -> @@ -141,6 +143,19 @@ clear_callback() -> ?MODULE ! {self(), clear_callback}, wait(). +-spec set_options(Options) -> 'ok' | {'error', {'bad_options', Options}} when + Options :: [atom()]. + +set_options(Options) -> + ?MODULE ! {self(), set_options, Options}, + wait(). + +-spec get_options() -> {'ok', Options} | 'none' when + Options :: [atom()]. + +get_options() -> + ?MODULE ! {self(), get_options}, + wait(). %%% Should be used solely by the release handler!!!!!!! -spec cycle() -> 'ok' | {'error', term()}. @@ -253,6 +268,22 @@ loop(Parent, #state{port=Port}=S) -> {From, clear_callback} -> From ! {?MODULE, ok}, loop(Parent, S#state{callback=undefined}); + {From, set_options, Options} -> + case validate_options(Options) of + Validated when is_list(Validated) -> + From ! {?MODULE, ok}, + loop(Parent, S#state{options=Validated}); + _ -> + From ! {?MODULE, {error, {bad_options, Options}}}, + loop(Parent, S) + end; + {From, get_options} -> + Res = case S#state.options of + [] -> none; + Cb -> {ok, Cb} + end, + From ! {?MODULE, Res}, + loop(Parent, S); {From, cycle} -> %% Calls back to loop do_cycle_port_program(From, Parent, S); @@ -281,6 +312,11 @@ no_reboot_shutdown(Port) -> exit(normal) end. +validate_options(Opts) -> validate_options(Opts,[]). +validate_options([],Res) -> Res; +validate_options([scheduler=Opt|Opts],Res) -> validate_options(Opts,[Opt|Res]); +validate_options(_,_) -> error. + do_cycle_port_program(Caller, Parent, #state{port=Port} = S) -> unregister(?HEART_PORT_NAME), case catch start_portprogram() of @@ -310,7 +346,8 @@ do_cycle_port_program(Caller, Parent, #state{port=Port} = S) -> %% "Beates" the heart once. -send_heart_beat(#state{port=Port, callback=Cb}) -> +send_heart_beat(#state{port=Port, callback=Cb, options=Opts}) -> + ok = check_system(Opts), ok = check_callback(Cb), Port ! {self(), {command, [?HEART_BEAT]}}. @@ -327,6 +364,11 @@ get_heart_cmd(Port) -> {ok, Cmd} end. +check_system([]) -> ok; +check_system([scheduler|Opts]) -> + ok = erts_internal:system_check(schedulers), + check_system(Opts). + %% validate system by performing a check before the heartbeat %% return 'ok' if everything is alright. %% Terminate if with reason if something is a miss. @@ -334,7 +376,6 @@ get_heart_cmd(Port) -> %% if something goes wront -> no heartbeat. check_callback(Callback) -> - ok = erts_internal:system_check(schedulers), case Callback of undefined -> ok; {M,F} -> |