Function async_increment

tests-ios/prelude.rs:9–15

(queue: &Queue, num: &Arc<Mutex<i32>>)

use dispatch::ffi::*;

fn async_increment(queue: &Queue, num: &Arc<Mutex<i32>>) {
    let num = num.clone();
    queue.exec_async(move || {
        let mut num = num.lock().unwrap();
        *num += 1;
    });
}