Compute Fibonacci numbers concurrently

    • wasmedge-sys v0.7.0
    • wasmedge-types v0.1.1

    In this example, we will demonstrate how to use the objects and the APIs defined in to compute Fibonacci numbers concurrently.

    2. #![allow(unused)]
    3. fn main() {
    4. let vm = Arc::new(Mutex::new(vm));
    7. let handle_a = thread::spawn(move || {
    8.   let vm_child_thread = vm_cloned.lock().expect("fail to lock vm");
    9.   let returns = vm_child_thread
    10.     .run_registered_function("extern", "fib", [WasmValue::from_i32(4)])
    11.     .expect("fail to compute fib(4)");
    13.   let fib4 = returns[0].to_i32();
    14.   println!("fib(4) by child thread: {}", fib4);
    16.   fib4
    17. });
    19. let vm_cloned = Arc::clone(&vm);
    21.   let vm_child_thread = vm_cloned.lock().expect("fail to lock vm");
    22.   let returns = vm_child_thread
    23.     .run_registered_function("extern", "fib", [WasmValue::from_i32(5)])
    24.     .expect("fail to compute fib(5)");
    26.   let fib5 = returns[0].to_i32();
    27.   println!("fib(5) by child thread: {}", fib5);
    29.   fib5
    30. });

    let fib4 = handle_a.join().unwrap(); let fib5 = handle_b.join().unwrap(); // compute fib(6) println!("fib(6) = fib(5) + fib(1) = {}", fib5 + fib4);

    fib(4) by child thread: 5 fib(5) by child thread: 8 fib(6) = fib(5) + fib(1) = 13