#[derive(Debug)]
struct PluginFfi;

static mut THIS_PLUGIN: Option<Box<PluginFfi>> = None;

#[no_mangle]
fn plugin_init() {
    unsafe {
        THIS_PLUGIN = Some(Box::new(PluginFfi));
    }
}

#[no_mangle]
fn plugin_end() {
    unsafe {
        THIS_PLUGIN = None;
    }
}

impl Drop for PluginFfi {
    fn drop(&mut self) {
        println!("{:?} dropped", self);
    }
}

fn main() {
    plugin_init();
    plugin_end();
}