A foreign function interface (FFI) is a mechanism for one language to interact with software written in another language.
Questions tagged [ffi]
1778 questions
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Bundler could not find compatible versions for gem "ffi" in jekyll
I do these commands for install jekyll :
gem install bundler_bundle install_bundle update
Bundler could not find compatible versions for gem "ffi":
In snapshot (Gemfile.lock):
ffi (= 1.15.0)
In Gemfile:
bootstrap (~> 4.4.1) was…
Mostafa Esl
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What are the differences between these 4 methods of returning `bytes` from Rust to Python using `pyo3`?
I'm new to pyo3 and a beginner in Rust. What I'm trying to do is to return from Rust slice to Python bytes. I read both about the type conversion and memory management in the pyo3 documentation, but I still feel a bit lost.
This is what I have right…
se7entyse7en
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Are JNI calls still 'slow' on android in 2022?
I was thinking of adding some native code to my Android application, but I wanted to find out if it's worth it and if JNI calls are currently optimized. The function calls would involve transferring information from Java to native code and…
Kofi
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How to pass a callback to a win32 function with dart ffi?
I'm trying to connect to my MIDI device to a Flutter app running on Windows. I'm using win32 and dart ffi. I have the following:
final Pointer hMidiDevice = malloc();
Pointer> callbackPointer =
…
user4401
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Exposing Python class to Rust
I'm trying to do a simple task of handling a Python class in Rust. Instantiate it, do an operation and than access one of its members. I extensively looked at PyO3 and cpython documentation and they cover a lot of the opposite (calling Rust from…
mbfernan
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How to represent method calls ReScript 9.1.2
ReScript 9.1.2 made the original @meth semantics inaccessible they said to use @send external instead to represent method calls
My questions are:
can @send external be inside a type?
and is this a correct way to use it knowing that it generates the…
Fer iel
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How to get the address of the buffer in nodejs?
So the quesion, I want to pass a pointer to a buffer I created in JS to a C++ library. How to get the address of a buffer in memory?
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Controlling C++ compiler for Dart FFI via Xcode
Friends
I am using a C++ routine called using FFI from Dart/Flutter on iOS. i am getting disappointing results.
I followed these instructions, which basically had me dropping C++ files into the Xcode file structure.
I would like to know:
what C++…
Wrog
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Haskell FFI includes: is there a difference between including and "xx.hs"?
I work on code I have not written. It uses the Haskell Foreign Function Interface (FFI) and includes some code in C.
The 9.0.1 GHC documentation gives an example of such includes as:
#include
#include "HsFFI.h"
and I do not see an…
user855443
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Error: To set up CocoaPods for ARM macOS, run: arch -x86_64 sudo gem install ffi
Error: To set up CocoaPods for ARM macOS, run:
arch -x86_64 sudo gem install ffi
Error running pod install
Error launching application on iPhone 12 Pro Max.
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Why cant you have multiple links on the same extern block?
I have multiple C libraries that I want to link to my Rust project. To do this I use multiple link attributes on the same extern block.
use libc::{c_int};
#[link(name = "zlib", kind = "static")]
#[link(name = "libpng", kind = "static")]
#[link(name…
Samuel Jenks
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Dart FFI Interrputed System Call
I have a C library and I call it from Dart using FFI. It does not work when the C library makes a system call (http). I built some examples with a C++ application and it works fine. In this example I also call the C library using dlopen (without…
Bruno Gallego
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Is there a way to store required libraries persistently? I'm running into error code H10
Im deploying a sinatra webapp that makes use of a c library, through Ruby FFI. I need this library to be compiled on the target machine. I do this through a Rakefile normally, but because of Heroku's ephemeral hard drive, any time I run rake the…
Parker McGowan
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libvips FFI use on Windows PHP cannot find glib functions
I am attempting to use the libvips package on Windows 11.
I have installed the composer package "jcupitt/vips": "2.0.0"
My local PHP setup is laragon, and I have enabled the FFI extension for PHP.
I have installed libvips binary for Windows and…
Keith Bauer
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Can't pass array from rust to Node (FFI)
I'm trying to pass an array of strings from a rust library to a nodejs program via FFI.
I followed an example from Create struct in C/Rust code for Node-FFI but can't quite get it to work. It works fine with a single element in the array, but if I…
Alexey
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