volatile thread-safe object, C++ (gcc)

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//Title of this code

#include <iostream>
#include <mutex>
using namespace std;

class ThreadSafeObject
{
private:
    std::mutex mutex_;
    
public:
    virtual ~ThreadSafeObject()
    {
    }
    
    void Lock()
    {
        std::cout<<"Locking...\n";
        mutex_.lock();
    }
    
    void Unlock()
    {
        std::cout<<"Unlocking...\n";
        mutex_.unlock();
    }
};
    
    
template<typename T>
class LockedPtr
{
private:
    ThreadSafeObject &p_;
        
public:
    LockedPtr(volatile ThreadSafeObject &p) : p_(const_cast<ThreadSafeObject&>(p))
    {
        p_.Lock();
    }
    
    ~LockedPtr()
    {
        p_.Unlock();
    }
public:
    T * operator->()
    {
       return dynamic_cast<T*>(&p_); 
    };
};
        
class SharedObj : public ThreadSafeObject
{
public:
    SharedObj()
    {
    }
    
    void method1() volatile
    {
        std::cout<<"method 1 called (thread-safe)!\n";
    }
    
    void method2()
    {
        std::cout<<"method 2 called (critical section only)!\n";
    }
};

template<typename T>
LockedPtr<T> get_locked(volatile T &_p)
{
    return LockedPtr<T>(_p);
}

int main()
{
    volatile SharedObj obj;
    
    obj.method1();
    
    {
        auto ptr = get_locked(obj);
            
        ptr->method2();
    }
    
    
    obj.method1();
}

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Compilation time: 0.38 sec, absolute running time: 0.14 sec, cpu time: 0 sec, memory peak: 3 Mb, absolute service time: 0.53 sec