shared boost::shared_ptr<> variable is thread safe?

Question

boost::shared_ptr<A> g_a;

void func1(boost::shared_ptr<A> v)
{
    g_a = v;
}

void func2()
{
    boost::shared_ptr<A> a = g_a;
    // a is good?
}

When func1() and func2() is executed from different threads, a of func2() is safe?

http://www.boost.org/doc/libs/1_53_0/libs/smart_ptr/shared_ptr.htm#ThreadSafety — hmjd, Apr 19 '13 at 09:58

score 2 · Accepted Answer · answered Apr 19 '13 at 10:09

2

No. There is data race. One thread writes g_a, another thread reads g_a. Sync needed.

answered Apr 19 '13 at 10:09

Andrey Volk

1 Answers1