passing const pointer parameter to function with boost::thread

Question

I have a function as follows

 void test(const int * x, int d){
     for(int i=0; i<d ; i++)
         cout<< x[i] << endl;
 }

When I try to run it with a boost::thread

int n=10;
int * x1=new int[n];
boost::thread *new_thread = new boost::thread(& test,x1,n);

I get the following compilation error

error: no matching function for call to ‘boost::thread::thread(<unresolved overloaded function type>, int*&, uint16_t&)’
/usr/include/boost/thread/detail/thread.hpp:216: note: candidates are: boost::thread::thread(boost::detail::thread_move_t<boost::thread>)
/usr/include/boost/thread/detail/thread.hpp:155: note:                 boost::thread::thread()
/usr/include/boost/thread/detail/thread.hpp:123: note:                 boost::thread::thread(boost::detail::thread_data_ptr)
/usr/include/boost/thread/detail/thread.hpp:114: note:                 boost::thread::thread(boost::thread&)
main.cpp:397: warning: unused variable ‘new_thread’

Indeed, I'm newbie to boost. Thank you.

Answer 1

Looks like your test function overloaded:

//here
void test(const int * x, int d){
     for(int i=0; i<d ; i++)
         cout<< x[i] << endl;
 }

//somewhere
void test()
{
     std::cout <<"hahahahaha\n";
}

Now, when you specify test name

boost::thread *new_thread = new boost::thread(& test,x1,n);

Compiler cannot know, if you want to use one test function, or another.

• you should specify what overload you want to use:

   boost::thread *new_thread = new boost::thread((void(*)(const int*, int)) test,x1,n); 

• or rename your test function