(C++)스레드에서 인스턴스의 멤버 변수를 이용하는 경우의 메모리 관리

#include <iostream>
#include <memory>
#include <thread>
 
volatile int count;
 
struct object {
  explicit object(int __v) : v(__v) { std::cout << __PRETTY_FUNCTION__ << std::endl; }
  ~object() { std::cout << __PRETTY_FUNCTION__ << std::endl; }
 
  int v;
};
 
class runner : public std::enable_shared_from_this<runner>
{
  public:
    typedef std::shared_ptr<runner> pointer;
 
  public:
    static pointer create(int __v) { return pointer(new runner(__v)); }
    ~runner() { std::cout << __PRETTY_FUNCTION__ << std::endl; }
 
    void run() {
      std::thread th(&runner::work, shared_from_this());
      th.detach();
    }
 
    void work() {
      std::cout << __PRETTY_FUNCTION__ << " has been started" << std::endl;
      for(count=0; count<100000000; ++count); // no std::this_thread::sleep* in GCC 4.6.2
      std::cout << __PRETTY_FUNCTION__ << " : obj.v = " << m_obj.v << std::endl;
      std::cout << __PRETTY_FUNCTION__ << " is quitting" << std::endl;
    }
 
  private:
    runner(int __v) : m_obj(__v) { std::cout << __PRETTY_FUNCTION__ << std::endl; }
 
  private:
    object m_obj;
};
 
int main() {
  {
    auto ptr = runner::create(5);
    ptr->run();
  }
  std::cout << __PRETTY_FUNCTION__ << " : end of the block" << std::endl;
  for(count=0; count<200000000; ++count); // no std::this_thread::sleep* in GCC 4.6.2
  std::cout << __PRETTY_FUNCTION__ << " : quitting" << std::endl;
}