Re: [Boost-users] Thread safety and weak_ptr questions

Dizzy wrote:

Hello

struct A {}

// executes before spawning any boost threads shared_ptr<A> sp(new A()); weak_ptr<A> wp(sp);

// then in thread1 sp.reset();

// in thread thread2 shared_ptr<A> sp2(wp.lock());

Is the above code thread safe ?

Yes, it is. You are manipulating different variables in the two threads. The rules for weak_ptr are essentially the same as those for shared_ptr.