[Boost-users] owns_lock on lock not on mutex

Subject: [Boost-users] owns_lock on lock not on mutex
From: gast128 (gast128_at_[hidden])
Date: 2015-10-12 05:03:12

Hello all,

there is an owns_lock on the lock type but not on the mutex. This is quite 
unhandy. Any reason why?

Use case is in base-derived idiom:

class Foo
{
public:
    void Process()
    {
       boost::unique_lock<boost::mutex> lck(m_mtx);

       Update();
    }

protected:
   void Update()
   {
      ++m_n; 
   }

   boost::mutex  m_mtx;
   int           m_n;
};

class Bla : public Foo
{
public:
    void Process()
    {
       boost::unique_lock<boost::mutex> lck(m_mtx);

       Update();
    }

private:
   void Update()
   {
      assert(m_mtx.owns_lock());

      ++m_n2;

      Foo::Update(); 
   }

   int           m_n2;
};