crystal-lang/crystal

The Crystal programming language | http://crystal-lang.org | Fund Crystal's development: http://is.gd/X7PRtI | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/

dumbmahreeo

@dumbmahreeo:matrix.org

[m]

Imo calling Crystal production ready with this single problem (which is not the only one) is really v-lang level talk

George Dietrich

@Blacksmoke16

:shrug: make a forum thread about this info and see if there's any quick wins

dumbmahreeo

@dumbmahreeo:matrix.org

[m]

I forgot that Crystal had a forum. Yeah, I think that I'll start a thread

George Dietrich

@Blacksmoke16

some would argue the biggest problem is windows support, or MT not being 100% yet, etc. Doesn't mean it's not production ready

dumbmahreeo

@dumbmahreeo:matrix.org

[m]

In fact I'm not saying that's it's the biggest problem. I'm saying that it's an incredibly huge problem, yet not the biggest one

George Dietrich

@Blacksmoke16

maybe less so in some areas, but in the end is just another problem that needs solving

ddd

@Dan-Do

I am dealing with that using timeout channel atm

Kirk Haines

@wyhaines

I don't think it's really even a problem that needs to be solved. The fact that fibers do not have a pre-emptive scheduler means that one must understand that fact when writing concurrent code, but it's hardly a flaw. Insert a Fiber.yield into the loop, and it is no longer blocking.

Quinton Miller

@HertzDevil

soon...?

the asm output is not very useful if i include the prelude

Quinton Miller

@HertzDevil

in fact compiling anything with the prelude and --release causes a timeout

Alex Kampa

@alex-kampa

can manually do sleep 0 to somewhat get around this tho

Hi @Blacksmoke16 will "sleep 0 "have the same effect as Fiber.yield ?

@wyhaines you suggested Fiber.yield, what do you think about "sleep 0", what's the difference?

From IRC (bridge bot)

@FromIRC

<straight-shoota> It's literally the same: Fiber.yield is implemented as sleep(0)

Alex Kampa

@alex-kampa

Ok, so just to be 100% sure, the place to insert this would be as follows:

spawn do
  loop do
    server.accept do |client|
      message = client.gets
      client << process(message)
    end
    Fiber.yield # same as sleep(0)
  end
end

Is that correct?

From IRC (bridge bot)

@FromIRC

<straight-shoota> Technically, yes. But it's really not necessary at this location.

<straight-shoota> Yielding a fiber is a tool you would use in a tight loop to give the scheduler an opportunity to change to some other task.

<straight-shoota> But your loop contains I/O operations which already expose such opportunities due to their async implementation

Alex Kampa

@alex-kampa

Thanks for the clarification. Yes I noticed that it all works well without putting in the Fiber.yield.

Rishav Sharan

@rishavs

Hey @straight-shoota how goes the Windows signals work? eagerly awaiting it. :smiley_cat:

From IRC (bridge bot)

@FromIRC

<yxhuvud> straight-shoota: I wouldn't mind moving Scheduler#yield to a event loop dependent place though. I don't know about how it would work on windows but at least for uring it makes no sense to set up a timer instead of using a NOP op.

<yxhuvud> assuming there is even need to emit an op in the first place, which is questionable.

<straight-shoota> @rishavs, Windows is not exactly made for signals. We'll probably be able to imitate a few of them, but you shouldn't expect that to work as on posix systems

<straight-shoota> More info on crystal-lang/crystal#7339

<straight-shoota> yxhuvud, yeah, that's probably a good idea. Fiber.yield == sleep 0 is an implementation detail of the event loop

Rishav Sharan

@rishavs

:heart:

I just want crystal on windows so I can do some gamejams using crsfml ^_^. I am not interested in the networking bits, just hate the effort it requires to set up crystal on windows currently.
I would be happy if I can just do scoop install crystal and the compiler after installation throws a big honking text Networking is currently not supported on windows platform.

Anyway, wanted to thank you and the rest of the team on picking more big rocks on the windows side of things.

Quinton Miller

@HertzDevil

does crystal have the capability to distinguish between prelude code and user code in build artifacts

mainly asm and llvm-ir

From IRC (bridge bot)

@FromIRC

<yxhuvud> what functions would be part of the prelude?

Rishav Sharan

@rishavs

Any sneak peak on the 1.10 changelog?

jhass

@jhass:m.aeshna.de

[m]

https://github.com/crystal-lang/crystal/pulls?q=is%3Amerged+is%3Apr+milestone%3A1.1.0+

Rishav Sharan

@rishavs

Thanks @jhass:m.aeshna.de !

manveru

@manveru:matrix.org

[m]

hi folks, i'm trying to parse a stream of rather large json objects without any delimiters between them from an IO... is there some sane way to do that

the only way i've found so far would be to use the JSON::PullParser and manually try to parse everything... or maybe going through the stream and counting braces, but that's also error-prone because of escaping

George Dietrich

@Blacksmoke16

can you alter the source to make them at least on unique lines?

manveru

@manveru:matrix.org

[m]

unfortunately not, i'm consuming a 3rd party api for streaming events

hmm, lemme double-check that though

ok, i must've made some mistake, it seems a simple gets on the io with a huge buffer works :)

manveru

@manveru:matrix.org

[m]

and each_line is even more elegant

George Dietrich

@Blacksmoke16

so they are delimited then?

manveru

@manveru:matrix.org

[m]

i tried IO::Delimited first, but that was probably wrong

sure looks like there are proper newlines in there, yeah

sorry for the disturbance ^^;

Quinton Miller

@HertzDevil

looking at the llvm ir and asm outputs, they do include source locations even without --debug which should be enough

because on compiler explorer there should most certainly be only one non-library source file, everything else would be considered "third-party" code

aaaScript

@aaaScript

Hi everyone. I have a quick question. Has anyone ever had an issue with closing a HTTP::Server's port when it is created in a fiber. I'll try to see if I can come up with some cleaned code but I'm basically creating an having a new HTTP Server listen while in a spawn block so that it doesn't block the rest of the program. Then later I'm trying to close it with the #close function outside of the spawn block later on. However despite that it still leaves the socket open and listening. I'm assuming it needs to be closed within the spawn block but I'm wondering if anyone has some insight on that.

From IRC (bridge bot)

@FromIRC

<straight-shoota> that should really make no difference

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