103 lines
6.1 KiB
Markdown
103 lines
6.1 KiB
Markdown
# Portable Foreign Function Interface for R7RS schemes
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Foreign function interface that is supported on multiple R7RS Sceheme implementations.
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Note that this software is in **alpha** stage. That said the interface should not be changing anymore.
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Any help in form of constructive advice and bug reports are appreciated.
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[Documentation](https://retropikzel.neocities.org/r7rs-pffi/) or run mkdocs serve or see docs/.
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[Issue trackers](https://sr.ht/~retropikzel/r7rs-pffi/trackers)
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[Maling lists](https://sr.ht/~retropikzel/r7rs-pffi/lists)
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[Jenkins](https://jenkins.staging.scheme.org/job/r7rs-pffi/job/master/).
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For documentation see [retropikzel.neocities.org/r7rs-pffi](retropikzel.neocities.org/r7rs-pffi)
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or run mkdocs serve or see or docs/ directory.
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## Goals
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- Support only R7RS implementations
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- Same interface on all implementations
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- Some things that are procedures on one implementation are macros on other,
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but they must behave the same
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## Non goals
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- To have every possible FFI feature
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- Compiling of used library C code at any point
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- That is no stubs, no C code generated by the library and so on
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- The pffi library itself may require compilation on installation
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## Status
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Currently the interface of the library is in okay shape. It propably will not change much but no
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guarantees are being made just yet.
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## Implementation table
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| | Chibi | Chicken | Cyclone | Gambit | Gauche | Gerbil | Guile | Kawa | Mosh | Racket | Sagittarius | Skint | STklos | tr7 |
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| ------------------------------- | ----- | ------- | ------- | ------- | ------ | ------ | ----- | ---- | ---- | ------ | ----------- | ----- | ------ | --- |
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| pffi-init | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-size-of | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-shared-object-auto-load | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-shared-object-load | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-pointer-null | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-pointer-null? | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-pointer-allocate | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-pointer? | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-pointer-free | X | X | X | | | | X | X | X | X | X | | X | |
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| pffi-pointer-set! | X | X | X | | | | X | X | X | X | X | | | |
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| pffi-pointer-get | X | X | X | | | | X | X | X | X | X | | | |
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| pffi-string->pointer | X | X | X | | | | X | X | X | X | X | | | |
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| pffi-pointer->string | X | X | X | | | | X | X | X | X | X | | | |
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| pffi-define | X | X | X | | | | X | X | X | X | X | | | |
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| pffi-define-callback | | X | | | | | X | | X | X | X | | | |
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| pffi-pointer-address | | X | | | | | X | | | X | X | | | |
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| pffi-pointer-dereference | | | | | | | X | | | X | X | | | |
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### Usage notes
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- Chibi
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- Install libffi-dev
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- Build with:
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- chibi-ffi retropikzel/r7rs-pffi/r7rs-pffi-chibi.stub
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- ${CC} -o retropikzel/r7rs-pffi/r7rs-pffi-chibi.so -fPIC -shared retropikzel/r7rs-pffi/r7rs-pffi-chibi.c -lchibi-scheme -lffi
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- Chicken 5
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- Needs [r7rs egg](https://wiki.call-cc.org/eggref/5/r7rs)
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- Kawa
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- Needs at least Java version 22
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- Needs jvm flags:
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- --add-exports java.base/jdk.internal.foreign.abi=ALL-UNNAMED
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- --add-exports java.base/jdk.internal.foreign.layout=ALL-UNNAMED
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- --add-exports java.base/jdk.internal.foreign=ALL-UNNAMED
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- --enable-native-access=ALL-UNNAMED
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- Racket
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- Needs [racket-r7rs](https://github.com/lexi-lambda/racket-r7rs)
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### Design/exploration/waiting for implementation features
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- [LIPS](https://lips.js.org/)
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- Will work on nodejs by using some C FFI library from npm
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- Javascript side needs design
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- [Biwascheme](https://www.biwascheme.org/)
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- Will work on nodejs by using some C FFI library from npm
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- Javascript side needs design
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- [MIT-Scheme](https://www.gnu.org/software/mit-scheme/)
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- [s7](https://scheme.fail://ccrma.stanford.edu/software/snd/snd/s7.html)
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- [Ypsilon](http://www.littlewingpinball.com/doc/en/ypsilon/)
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- [Larceny](https://larcenists.org/)
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- [Airship](https://gitlab.com/mbabich/airship-scheme)
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- [Other gambit targets](https://gambitscheme.org/)
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- Gambit compiles to different targets other than C too, for example Javascript. It would be cool
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and interesting to see if this FFI could also support some of those
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- [s48-r7rs](https://codeberg.org/prescheme/s48-r7rs)
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- [prescheme](https://codeberg.org/prescheme/prescheme)
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### Will/can not be supported
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- [Loko](https://scheme.fail/)
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- Desires no C interop, I can respect that
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