struct St {
mut:
	x int
	// data to be shared
}

fn (shared b St) g(shared c St) {
	lock b {
		b.x = 100
	}
}

fn foo(shared b St) {
	lock b {
		b.x = 101
	}
}

fn main() {
	shared a := St{
		x: 10
	}
	spawn a.g(a)
	spawn foo(a)

	rlock a {
		println(a.x)
	}
}