Question

I have a strange error.

class INST
{
public:
boost::mutex m_mutex;
};

std::vector<INST> m_inst;

error C2248: ‘boost::mutex::mutex’ : cannot access private member declared in class ‘boost::mutex’
see declaration of ‘boost::mutex::mutex’

However, my other class is fine,

class VIEW
{
public:
boost::mutex m_mutex;
};

VIEW m_view;

Am I missing something here? I have tried to declare m_mutex to private, but still have the same problem.

Thanks.

Answer 1

mutexes can’t be copied, so you can’t place them in a container which would copy the mutex. The error is likely referring to the private copy constructor of the mutex.