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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: What's the correct way to pass struct in FFI?

Usually, I pass the FFI struct in extern "system" fn directly.

#[repr(C)]
pub struct Buffer {
    data:*mut u8,
    len: i32,
}

extern "system" fn some_function(a:Buffer) -> Buffer {
   todo!()
}

But since the C ABI Changes for wasm32-unknown-unknown | Rust Blog, now I use it like this.

extern "system" fn some_function(a:&Buffer) ->Buffer {
  todo!()
}

It is fine when using it in Windows, but I got a crash when it runs on Android.

So what's the proper way to be compatible on all platforms?

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