Tasks Alternatives

tasks reviews and mentions

• Using Files with Browsers, in Reality
  3 projects | news.ycombinator.com | 21 Mar 2022

  I probably wouldn't have guessed that `e.dataTransfer.items` gets cleared at the first await (since I'm not a proficient web developer), but I would've been extremely wary of this code in general. Additionally (not tied to async-await but race conditions in general), is `item.getAsFileSystemHandle()` a TOCTTOU vulnerability where the type of an item can change between folders and files and symlinks etc., while this code is running?

  Rust's & vs. &mut system largely eliminates shared state hazards in both threading and asynchronity (&mut is exclusive/unaliased and can't be mutated by other threads or event loop jobs, and & is difficult and unidiomatic to mutate), though it doesn't solve async cancellation errors (https://carllerche.com/2021/06/17/six-ways-to-make-async-rus..., discussed at https://news.ycombinator.com/item?id=27542504), or filesystem TOCTTOU (https://blog.rust-lang.org/2022/01/20/cve-2022-21658.html as well as user code).

  Qt event loop reentrancy is fun(tm) as well. It looks like a blocking call, but spawns a nested event loop which can do anything (but rarely enough to lull you into a false sense of complacency), resulting in segfaults like https://github.com/Nheko-Reborn/nheko/issues/656 (workaround at https://github.com/Nheko-Reborn/nheko/commit/570d00b000bd558..., I didn't look into it). And Qt lacks "easy" await syntax and a framework based on calling red functions (though I didn't look into C++20 coroutines yet, perhaps https://www.qt.io/blog/asynchronous-apis-in-qt-6 or https://github.com/mhogomchungu/tasks or https://blog.blackquill.cc/asynchronous-qtquick-uis-and-thei...?).