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d1be154 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #ifndef OT_UTILITY_SINGLETON_HPP_
#define OT_UTILITY_SINGLETON_HPP_
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <memory>
namespace ot {
// Class: EnableSingletonFromThis
// Guarantees that only a single instance of an object will exist throughout the
// lifetime of the program.
template <typename Derived>
class EnableSingletonFromThis {
public:
static Derived& get();
protected:
EnableSingletonFromThis() = default;
~EnableSingletonFromThis() = default;
private:
//EnableSingletonFromthis(const EnableSingletonFromThis&) = delete;
//EnableSingletonFromthis(EnableSingletonFromThis&&) = delete;
EnableSingletonFromThis & operator = (const EnableSingletonFromThis&) = delete;
EnableSingletonFromThis & operator = (EnableSingletonFromThis&&) = delete;
};
// Function: get
template <typename Derived>
Derived& EnableSingletonFromThis<Derived>::get() {
static Derived object;
return object;
}
}; // End of ot namespace. --------------------------------------------------------------
#endif
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