plugin.rs

// plugin.rs
// This code should be compiled into a shared library
#![crate_type="dylib"]

#![allow(dead_code, unused_variables)]
use std::os::raw;

// function provided by the glue code
extern "C" {
    fn hook_event(
        external: *mut External,
        event: u32,
        callback: unsafe extern "C" fn(data: *mut raw::c_void),
        callback_data: *mut raw::c_void,
    );
}

// type provided by the glue code
#[repr(C)]
#[derive(Copy, Clone)]
pub struct External {
    _unused: [u8; 24], // just for example
}

#[repr(i32)]
#[derive(Copy, Clone)]
pub enum Result {
    Ok = 0,
    OkEat = 1,
    Error = -1,
}

#[no_mangle]
pub extern "C" fn plugin_init(external: *mut External) -> Result {
    // plugin author (you) need to write this
    Result::Ok
}

#[no_mangle]
pub extern "C" fn plugin_end(external: *mut External) -> Result {
    // plugin author (you) need to write this
    Result::Ok
}