#include <iostream>
#include <mutex>
#include <thread>

using namespace std ;

recursive_mutex myRecursiveMutex;

void function2( int thread_id  )
{
  unique_lock<recursive_mutex> lock(myRecursiveMutex);
  cout << "function2: with thread id of:" << thread_id << endl ;
}


void function1( int thread_id  )
{
  cout << "function1: with thread id of:" << thread_id << endl ;
  myRecursiveMutex.lock();
  for( int i1=1; i1<=5 ; i1++ )
    {
       function2( thread_id ) ;
	}
}


int main()
{
    thread t1( function1, 1 );
    //this_thread::sleep_for(chrono::milliseconds(10));
    thread t2( function2, 2 );
    t1.join();
    t2.join();

    return 0;
}