Interop with c in clojure
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This document discusses various approaches to interoperating between Clojure and C code, including JNI, JNA, JNR, and JavaCPP. It focuses on examples of using SDL, a cross-platform multimedia library, from Clojure. Specifically, it provides code samples for binding SDL using JNA and shares a Clojure project that demonstrates this approach. It encourages questions during the presentation through an online chat.
Interop with c in clojure
- 1. Interop with C in Clojure (load native) netpyoung@gmail.com April 2019 #1
- 2. Do you have any Questions? - for keep time, to save each others time - If you have questions, during presentation. - message on slack #clojure-sg with page #numer. - https://clojurians.slack.com/messages/clojure-sg - ex) #10 - what is blabla? - I will answer after presentation. - so, I can polish this slide from your feedbacks. #2
- 3. EunPyoung Kim KOR -> JPN -> SGP Game Client Programmer. (since 2012.04 ~ ) I like Lisp (not only clojure) Im Lazy because of that I like automatation (code generate also) I like macro (but don't abuse) I like Emacs Cursive (Neo)Vim.? https://netpyoung.github.io/ #3
- 4. What I want & What I did. I want to trying use SDL library via clojure I made some examples for c binding. I want to share approach and experience. #4
- 5. Problem? How to load library. Writing wrapper function. C structure layout for pointer access. #5
- 6. Java & C Binding performance check https://github.com/yulewei/java-ffi-demo JNI > JNR > JNA (Direct Mapping) > JNA (Interface Mapping) name date JNI 1997.02 JNA 2007.03 JNR 2013.02 JavaCPP 2015.07 Panama EAB #6 No Examples on This presentation
- 7. JNI from JDK 1.1 https://docs.oracle.com/javase/8/docs/technotes/guides/jni/ #7
- 8. JNI Example 1. prepare native c library 2. writing && compile interop java file 3. generate interop c header 4. writing && compile interop c library 5. writing && build clojure project with interop java file 6. call clojure library with native c library and interop c library #8
- 10. JNA Example 1. prepare native c librar 2. writing && build clojure project #10
- 11. JNR https://github.com/jnr/jnr-ffi jnr-ffi is a Java library for loading native libraries without writing JNI code by hand, or using tools such as SWIG. /skrb/jnr-java-native-runtime https://www.oracle.com/technetwork/java/jvmls2013nutter-2013526.pdf #11
- 12. JNR Example 1. prepare native c librar 2. writing && build clojure project #12
- 15. Panama https://openjdk.java.net/projects/panama/ Panama: A Foreign Policy for Java by Maurizio Cimadamore Going Meta to Valhalla & Panama with John Rose #15
- 17. SDL Simple DirectMedia Layer cross-platform development library. designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D #17
- 18. SDL Language Bindings https://www.libsdl.org/languages.php Ada C# D Go Lua OCaml Pascal Python Rust #18
- 19. Java SDL Binding? https://github.com/javasdl/libjavasdl using JNA #19
- 20. JNA Example(SDL) SDL2(C language) binding in clojure #20
- 21. Demo Clojure binding for SDL2 https://github.com/netpyoung/cljpyoung.sdl2 #21
- 22. Questions ex) #10 - what is blabla? #22
- 24. Thank you
Editor's Notes
- Today is maybe my last day to attend this seminar