Singleton.h

#pragma once
 
namespace Devel {
    template<typename T>
    class CSingleton {
    protected:
        CSingleton() = default;
 
        CSingleton(const CSingleton &) = delete;
 
        CSingleton &operator=(const CSingleton &) = delete;
 
        virtual ~CSingleton() = default;
 
    public:
        static T *instance() {
            static T s_oInstance;
            return &s_oInstance;
        }
    };
}