xref: /recipes/thread/test/Singleton_test.cc

#include "../Singleton.h"
#include "../Thread.h"

#include <boost/noncopyable.hpp>
#include <stdio.h>

class Test : boost::noncopyable
{
 public:
  Test()
  {
    printf("tid=%d, constructing %p\n", muduo::CurrentThread::tid(), this);
  }

  ~Test()
  {
    printf("tid=%d, destructing %p %s\n", muduo::CurrentThread::tid(), this, name_.c_str());
  }

  const std::string& name() const { return name_; }
  void setName(const std::string& n) { name_ = n; }

 private:
  std::string name_;
};

void threadFunc()
{
  printf("tid=%d, %p name=%s\n",
         muduo::CurrentThread::tid(),
         &muduo::Singleton<Test>::instance(),
         muduo::Singleton<Test>::instance().name().c_str());
  muduo::Singleton<Test>::instance().setName("only one, changed");
}

template<unsigned N>
class Destruct
{
 public:
  Destruct()
  {
    printf("construct %d\n", N);
    more();
  }

  ~Destruct()
  {
    printf("destruct %d\n", N);
  }

  void more()
  {
    muduo::Singleton<Destruct<N-1> >::instance();
  }
};

template<>
void Destruct<0>::more()
{
}

int main()
{
  muduo::Singleton<Test>::instance().setName("only one");
  muduo::Thread t1(threadFunc);
  t1.start();
  t1.join();
  printf("tid=%d, %p name=%s\n",
         muduo::CurrentThread::tid(),
         &muduo::Singleton<Test>::instance(),
         muduo::Singleton<Test>::instance().name().c_str());

  muduo::Singleton<Destruct<500> >::instance();
}