Clojure Rust GraalVM example updated: https://github.com/borkdude/clojure-rust-graalvm Now uses a Rust library to get the amount of free memory and displays it in EDN.

@retrogradeorbit Included your cool trick of storing the lib in ~/.clojure_rust and loading it from there now: https://github.com/borkdude/clojure-rust-graalvm/commit/2c0d01c771c67400f5cae4aa596e6e58b29bd897

@retrogradeorbit Where are the functions that you are calling from Clojure to C location in your source?

I mean the Clojure part calling into C

https://github.com/epiccastle/spire/blob/master/src/clj/spire/ssh_agent.clj#L58

for all of them just grep for SpireUtils

ah here you define the native things in Java: https://github.com/epiccastle/spire/blob/master/src/c/SpireUtils.java so it looks like you're also using JNA right?

not JNA, no. graal doesnt support JNA

sorry JNI

yep JNI

so SpireUtils.java is used to generate SpireUtils.h

JNI is more performant anyway, right?

yep. significantly more performant. but much more ceremony around it

JNA is almost magical.

header file is generated here:

https://github.com/epiccastle/spire/blob/master/Makefile#L74-L81

so in JDK8 there was a special tool javah

in JDK11 its bundled into javac

Awesome. I added this to the graal docs repo: https://github.com/lread/clj-graal-docs#interfacing-with-native-libraries If you have anything to add there, feel free.

I can add some stuff sure

I think adding the remarks about javah / javac could definitely be useful

Yeah I will write a quick summary for the C library case.

https://github.com/lread/clj-graal-docs/pull/30

🙏