Using a vector of thread in another thread : error attempting to reference a deleted function

Question

I'm trying to send a vector to parameter of another thread's function :

void foo(){}
const int n = 24;
void Thread_Joiner(std::vector<thread>& t,int threadNumber)
{
    //some code
}
int main()
{
    std::vector<thread> threads(n, thread(foo));
    thread Control_thread1(Thread_Joiner, threads, 0);//error
    thread Control_thread2(Thread_Joiner, threads, 1);//error
    //...
}

The above code give this error :

: attempting to reference a deleted function

I checked the header file of std::thread It seems that copy constructor is deleted : thread(const thread&) = delete;

std::thread have a move constructor but I don't think in this case using move is helpfull because Control_thread1 and Control_thread2 use same vector !

If I use thread **threads;... instead of that vector It works fine but I don't want to use pointers .

What should I do ?!

Answer 1

std::thread copies the arguments used for the bind. Use std::ref to contain it as a reference:

std::thread Control_thread1(Thread_Joiner, std::ref(threads), 0);
std::thread Control_thread2(Thread_Joiner, std::ref(threads), 1);