dev/vala/threads/async_ex.vala

async void async_method(int idx, int max, int step, MainLoopKeeper mlk) {
	for(var i = 0; i < max; ++i) {
		stdout.puts(@"Async$idx:$i\n");
		for(var j = 0; j < step; ++j) {
			Idle.add(async_method.callback);
			yield;
		}
	}
}

public class MainLoopKeeper {
	MainLoop _loop;
	public MainLoopKeeper(MainLoop loop) { _loop = loop; }
	~MainLoopKeeper() { _loop.quit(); }
}

void start_methods(MainLoop loop) {
	var mlk = new MainLoopKeeper(loop);
	async_method.begin(1, 8, 1, mlk);
	async_method.begin(2, 3, 2, mlk);
}

void main() {
	var loop = new MainLoop();
	stdout.puts("main:1\n");
	start_methods(loop);
	stdout.puts("main:2\n");
	loop.run();
	stdout.puts("main:3\n");
}