ゆとりAdventCalendar用
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$ erl | |
Erlang R16B (erts-5.10.1) [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false] | |
Eshell V5.10.1 (abort with ^G) | |
1> c(yutori). | |
{ok,yutori} | |
2> yutori:call(). | |
true | |
3> yutori:sushi(6,10). | |
sushi | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. | |
<0.42.0> sushi. | |
<0.43.0> sushi. | |
<0.44.0> sushi. | |
<0.45.0> sushi. | |
<0.46.0> sushi. | |
<0.40.0> sushi. |
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$ erl | |
Erlang R16B (erts-5.10.1) [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false] | |
Eshell V5.10.1 (abort with ^G) | |
1> l(yutori). | |
{module,yutori} | |
2> yutori:sushi(6,10). | |
** exception throw: {error,yutori_nante_nakatta} | |
in function yutori:send/3 (yutori.erl, line 19) |
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-module(yutori). | |
-import(io, [format/2]). | |
-export([waiting/0, call/0, sushi/2, prepare/3, send/3, stop/0]). | |
call() -> | |
register(yutori_is_waiting, spawn(yutori, waiting, [])). | |
stop() -> | |
case whereis(yutori_is_waiting) of | |
undefined -> throw({error, yutori_nante_nakatta}); | |
Pid -> Pid ! {stop_process, self()} | |
end. | |
sushi(Number, Times) -> | |
send(Number, Times, sushi). | |
send(Processes, Times, Message) when is_number(Processes), is_number(Times), Processes > 1, Message > 0 -> | |
case whereis(yutori_is_waiting) of | |
undefined -> throw({error, yutori_nante_nakatta}); | |
Pid -> Pid ! {send_message, Processes, Times, Message}, | |
Message | |
end; | |
send(_, _, _) -> | |
error(badarg). | |
waiting() -> | |
receive | |
{send_message, Processes, Times, Message} -> | |
{Process, Time} = {Processes - 1, Times - 1}, | |
Next = spawn(yutori, prepare, [Process, Time, self()]), | |
Next ! {message, Message}, | |
loop(Time, Next), | |
waiting(); | |
{stop_process, Pid} -> | |
format("yutori~p is going to stop by ~p's order.~n", [self(), Pid]), | |
ok; | |
_ -> | |
try throw({error, "unexpected message comes!"}) of | |
_ -> waiting() | |
catch | |
Type:Message -> format("~p~n~n", [{Type, Message}]), | |
waiting() | |
end | |
end. | |
prepare(Process, Times, Top) -> | |
Next = next(Process - 1, Times, Top), | |
loop(Times, Next). | |
next(0, _, Top) -> | |
Top; | |
next(Process, Times, Top) -> | |
spawn(yutori, prepare, [Process, Times, Top]). | |
loop(Times, Next) -> | |
receive | |
{message, Msg} -> | |
timer:sleep(100), | |
format("~p ~p.~n", [self(), Msg]), | |
Next ! {message, Msg}, | |
case Times > 0 of | |
true -> loop(Times - 1, Next); | |
false -> finished | |
end | |
end. |
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