The Boehm Collector for C and C++

Listing 5: Class template Boehmable

// $Id$

#include <gc_cpp.h>
#include <list>
#include <iostream>
#include <string>
using std::cout;
using std::endl;
using std::list;
using std::string;

long constructors = 0;
long destructors = 0;

template<class Super>
class Boehmable : public Super, public virtual gc_cleanup {
public:
  // Don't need any member functions.  We inherit the
  // interfaces from Super and gc_cleanup.
  Boehmable () : Super (), gc_cleanup () { ++constructors; }
  virtual ~Boehmable () { ++destructors; }
};

int
main ()
{
  for (long i = 0; i < 10000; ++i) {
    list<int> *lst = new Boehmable< list<int> >;
    for (int j = 0; j < 1000; ++j) {
      lst->push_front (j);
    }
    list<string *> *strlst = new Boehmable< list<string *> >;
    for (int k = 0; k < 1000; ++k) {
      strlst->push_front (new Boehmable<string>);
    }
  }
  cout << "constructors " << constructors << ", destructors "
       << destructors << endl;
  return 0;
}