C++ 11: Mutex & Condition Variable Cannot be Copied

Question

Am new to C++ 11 and using threading. I came across a scenario where it's not possible to copy mutex & condition variable objects. The code is like this....

class producer {

   public: 
      producer(mutex m, condition_variable cv) 
      {
           mut = m;    // ERROR
           cvar = cv;   // ERROR
       }

    private:
         mutex mut;
         condition_variable cvar;
}

When trying to copy the variables in constructor it's giving the error. Seems like copy constructor is set to delete for mutex and cv.

Is there a way to overcome that? I want a producer & consumer class and then pass the mutex & cv from the main function.

so basically the call from main function should look like....

int main ()
{
    mutex m;
    condition_variable cv;
    //Initialize mutex & cv
    producer prod(m, cv);
}

Answer 1

No this is not possible. Features were added in C++ to enable this feature (non copying).

If you think about the implementation are you changing somekind of kernel object? Will that be the same. Probably not. This is by design.