单例模式声明和使用

1.

#ifndef __INFRAY_SINGLETON_H__
#define __INFRAY_SINGLETON_H__

#include <unistd.h>


#define PATTERN_SINGLETON_DECLAREY(classname)    \
private:                                        \
    classname();                                \
public:                                            \
    static classname * Instance();                \
    virtual ~classname();    

#define PATTERN_SINGLETON_IMPLEMENTY(classname)    \
classname * classname::Instance()        \
{                                                \
    static classname * _instance = NULL;        \
    if(NULL == _instance)                        \
    {                                            \
        _instance = new classname;                \
        usleep(10000);                            \
    }                                            \
    return _instance;                            \
}                                                

#endif

使用：

在头文件的类中声明

 

 并在C文件中实现