base_singleton.h File Reference

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Macros
#define	DECLARE_SINGLETON(CLASSNAME)
#define	DEFINE_SINGLETON(CLASSNAME)

Detailed Description

Singleton template macro definition. Use this macros to define singleton classes.

Author

Tomáš "Shamot" Burian

Macro Definition Documentation

DECLARE_SINGLETON

#define DECLARE_SINGLETON

(

CLASSNAME

)

Value:

\
public: \
    static CLASSNAME* instance(); \
    static void destroy(); \
\
protected: \
    CLASSNAME(); \
    ~CLASSNAME(); \
\
private: \
    static CLASSNAME* _instance;

Singleton class declaration. Must be in a header file. Example:

class ClassX { DECLARE_SINGLETON(ClassX); };

DEFINE_SINGLETON

#define DEFINE_SINGLETON

(

CLASSNAME

)

Value:

    CLASSNAME* CLASSNAME::_instance = nullptr; \
\
    CLASSNAME* CLASSNAME::instance() \
    { \
        if (!_instance) \
        { \
            _instance = new CLASSNAME; \
        } \
        return _instance; \
    } \
\
    void CLASSNAME::destroy() \
    { \
        delete _instance; \
        _instance = nullptr; \
    }

Singleton class definition. Must be in a cpp file. Example:

DEFINE_SINGLETON(ClassX);

Continue to define class constructor and destructor:

ClassX::ClassX() {};

ClassX::~ClassX() {};