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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    1. Patrick Walton‏ @pcwalton 19 Jul 2019
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      Replying to @pcwalton @asajeffrey @nokusu

      cc @ManishEarth: Here’s another silly idea: What if you could never store a strong reference from Rust code to a DOM object, ever? All JS object pointers would be forced with lifetimes to be stack-only. Use the reserved slot API and native JS collections for object data.

      2 replies 0 retweets 2 likes
    2. Manish‏ @ManishEarth 19 Jul 2019
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      Replying to @pcwalton @asajeffrey @nokusu

      How do you create new objects? Create a rooting context first? (This is what josephine does, innit?)

      1 reply 0 retweets 0 likes
    3. Patrick Walton‏ @pcwalton 19 Jul 2019
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      Replying to @ManishEarth @asajeffrey @nokusu

      Yeah, there would be some sort of context object bound to a lifetime that you could make objects with. That would also be the lifetime for roots. No need for DOMRefCell. No need for cursor objects. No need for Traceable. No need for custom collections: just use regular JS Arrays

      1 reply 0 retweets 0 likes
    4. Patrick Walton‏ @pcwalton 19 Jul 2019
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      Replying to @pcwalton @ManishEarth and

      This is how Objective-C works, as a point of comparison. They solve the problem of regular C code not knowing anything about automatic reference counting by just banning all Obj-C objects from C containers. You can only use NSArray, etc.

      2 replies 0 retweets 3 likes
    5. Manish‏ @ManishEarth 19 Jul 2019
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      Replying to @pcwalton @asajeffrey @nokusu

      We have a bunch of cases where there's a complex type stored inside a DOM object. Especially enums.

      1 reply 0 retweets 0 likes
    6. Patrick Walton‏ @pcwalton 19 Jul 2019
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      Replying to @ManishEarth @asajeffrey @nokusu

      It’s still possible to have complex objects stored inside DOM objects, with the “Rust object wrapper” I’m proposing. Just not complex objects that themselves hold onto DOM objects. Those would have to be replaced with alternatives.

      1 reply 0 retweets 1 like
    7. Manish‏ @ManishEarth 19 Jul 2019
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      Replying to @pcwalton @asajeffrey @nokusu

      Yeah, the latter is what I'm talking about

      1 reply 0 retweets 1 like
    8. Manish‏ @ManishEarth 19 Jul 2019
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      Replying to @ManishEarth @pcwalton and

      When I say complex I mean a mix of rust and js stuff.

      2 replies 0 retweets 0 likes
    9. Patrick Walton‏ @pcwalton 19 Jul 2019
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      Replying to @ManishEarth @asajeffrey @nokusu

      Well, let’s not do that then :) You can always replace that stuff with JS containers. This may have some kind of ergonomic cost, but I’m inclined to suggest that DOMRefCell and Traceable (in addition to memory unsafety!) are much worse ergonomic costs.

      3 replies 0 retweets 0 likes
    10. Anthony Ramine‏ @nokusu 19 Jul 2019
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      Replying to @pcwalton @ManishEarth @asajeffrey

      Josephine would let us have our cake and eat it. I would much rather avoid JS collections.

      2 replies 0 retweets 2 likes
      Patrick Walton‏ @pcwalton 19 Jul 2019
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      Replying to @nokusu @ManishEarth @asajeffrey

      Doesn’t Josephine have an awkward cursor API you have to deal with?

      4:46 PM - 19 Jul 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Anthony Ramine‏ @nokusu 19 Jul 2019
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          Replying to @pcwalton @ManishEarth @asajeffrey

          Not much more than having to root JS collections and whatnot.

          1 reply 0 retweets 2 likes
        3. Patrick Walton‏ @pcwalton 19 Jul 2019
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          Replying to @nokusu @ManishEarth @asajeffrey

          I dunno, https://github.com/asajeffrey/josephine/blob/master/examples/dbllist/dbllist.rs … looks really complicated compared to just using a plain old JS collection.

          2 replies 0 retweets 1 like
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