Function context_and_sync_function

src/lib.rs:104–118

(closure: &mut Option<F>)

}

fn context_and_sync_function<F>(closure: &mut Option<F>) ->
        (*mut c_void, dispatch_function_t)
        where F: FnOnce() {
    extern fn work_read_closure<F>(context: &mut Option<F>) where F: FnOnce() {
        // This is always passed Some, so it's safe to unwrap
        let closure = context.take().unwrap();
        closure();
    }

    let context: *mut Option<F> = closure;
    let func: extern fn(&mut Option<F>) = work_read_closure::<F>;
    unsafe {
        (context as *mut c_void, mem::transmute(func))
    }
}

fn context_and_apply_function<F>(closure: &F) ->
        (*mut c_void, extern fn(*mut c_void, usize))