samsara
glsp
samsara | glsp | |
---|---|---|
6 | 8 | |
64 | 388 | |
- | - | |
10.0 | 3.6 | |
over 1 year ago | about 2 years ago | |
Rust | Rust | |
- | Apache License 2.0 |
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samsara
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Garbage Collection for Systems Programmers
> IME it's the other way around, per-object individual lifetimes is a rare special case
It depends on your application domain. But in most cases where objects have "individual lifetimes" you can still use reference counting, which has lower latency and memory overhead than tracing GC and interacts well with manual memory management. Tracing GC can then be "plugged in" for very specific cases, preferably using a high performance concurrent implementation much like https://github.com/chc4/samsara (for Rust) or https://github.com/pebal/sgcl (for C++).
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Why choose async/await over threads?
> Just for example: "it needs a GC" could be the heart of such an argument
Rust can actually support high-performance concurrent GC, see https://github.com/chc4/samsara for an experimental implementation. But unlike other languages it gives you the option of not using it.
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Boehm Garbage Collector
The compiler support you need is quite limited. Here's an implementation of cycle collection in Rust: https://github.com/chc4/samsara It's made possible because Rust can tell apart read-only and read-write references (except for interior mutable objects, but these are known to the compiler and references to them can be treated as read-write). This avoids a global stop-the-world for the entire program.
Cascading deletes are rare in practice, and if anything they are inherent to deterministic deletion, which is often a desirable property. When they're possible, one can often use arena allocation to avoid the issue altogether, since arenas are managed as a single object.
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Steel – An embedded scheme interpreter in Rust
There are concurrent GC implementations for Rust, e.g. Samsara https://redvice.org/2023/samsara-garbage-collector/ https://github.com/chc4/samsara that avoid blocking, except to a minimal extent in rare cases of contention. That fits pretty well with the pattern of "doing a bit of GC every frame".
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Removing Garbage Collection from the Rust Language (2013)
There are a number of efforts along these lines, the most interesting is probably Samsara https://github.com/chc4/samsara https://redvice.org/2023/samsara-garbage-collector/ which implements a concurrent, thread-safe GC with no global "stop the world" phase.
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I built a garbage collector for a language that doesn't need one
Nice blog post! I also wrote a concurrent reference counted cycle collector in Rust (https://github.com/chc4/samsara) though never published it to crates.io. It's neat to see the different choices that people made implementing similar goals, and dumpster works pretty differently from how I did it. I hit the same problems wrt concurrent mutation of the graph when trying to count in-degree of nodes, or adding references during a collection - I didn't even think of doing generational references and just have a RwLock...
glsp
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Steel – An embedded scheme interpreter in Rust
3. Typed Racket
I almost used https://gamelisp.rs/ for a project but the nightly feature it needs broke and it's no longer maintained, glad to see something similar arise! You might want to consider adopting their choice of VecDeque as a list replacement, I think it makes a lot more sense than naive linked lists on modern machines.
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Official /r/rust "Who's Hiring" thread for job-seekers and job-offerers [Rust 1.68]
Varied employment history has left me with great soft skills and a broad grab-bag of technical skills, mostly leaning towards high-performance systems programming. Major solo projects have included the scripting language GameLisp, a 2D game engine, and a novel computer vision library.
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Interesting or distinctive lisps?
"Gamelisp is a scripting language for Rust game development." Feature list from the page: No garbage collection pauses (runs gc once per frame), Seamless Rust API, Memory-safe, Feature-rich ("Pattern‑matching, iterators, coroutines, macros..."), Easy entity scripting.
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RoguelikeDev Does The Complete Roguelike Tutorial - Week 1
I'm using Rust to build a host program, and the actual game logic written in GameLisp on top of the bracket-lib. I only have superficial knowledge of Rust, 0 lisp experience, and never embedded a language before, so that's a lot to learn and implement at the same time.
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RoguelikeDev Does The Complete Roguelike Tutorial Starting June 29th 2021
I'm not sure I'll go to the end of the 8 weeks, but I'll make that as fun/interesting as possible and (try to) use GameLisp!
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Implementing a VM: how unsafe should I go?
I feel qualified to answer this! GameLisp was once implemented with highly unsafe code, but later on I reimplemented it using only safe code, with a very small amount of optional unsafety behind a feature flag. GameLisp's performance is currently somewhere between Lua and Python when unsafe code is switched on, or a bit slower than Python when unsafe code is switched off.
- Practicality of embedding a lisp/scheme interpreter that is implemented as C library?
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Version 0.2 of GameLisp, a scripting language for Rust game development
It took a lot of wrestling with the type system, but I've managed to wring out several API improvements for version 0.2. I already considered GameLisp's Rust API to be best-in-class, and this release polishes it even further:
What are some alternatives?
sundial-gc - WIP: my Tweag open source fellowship project
libtcod - A collection of tools and algorithms for developing traditional roguelikes. Such as field-of-view, pathfinding, and a tile-based terminal emulator.
nitro - Experimental OOP language that compiled to native code with non-fragile and stable ABI
libtcod-vcpkg-template - A template for C++17 libtcod projects. This template uses Vcpkg to fetch dependencies.
gara
NetLogo - turtles, patches, and links for kids, teachers, and scientists
patty - A pattern matching library for Nim
bracket-lib - The Roguelike Toolkit (RLTK), implemented for Rust.
node-libnmap - API to access nmap from node.js
medley - The main repo for the Medley Interlisp project. Wiki, Issues are here. Other repositories include maiko (the VM implementation) and Interlisp.github.io (web site sources)
qcell - Statically-checked alternatives to RefCell and RwLock
phel-lang - Phel is a functional programming language that transpiles to PHP. A Lisp dialect inspired by Clojure and Janet.