c++ 单例存值

#include <stdio.h>
#include <bio.h>
#include "string.h"
#include "common/json.h"

#ifndef _SINGLETON_H_
#define _SINGLETON_H_

#include <iostream>

class singleton   //实现单例模式的类
  {
  private:
      singleton() {}  //私有的构造函数
        
  public:
      BIO *bioData;
      string m_cn;
      EVP_PKEY *signEvpPkey;

      void setsignData(BIO *bioKey){
          bioData = bioKey;
      }
      BIO* getsignData(){
          return bioData;
      }
      static singleton* GetInstance()
      {
          static singleton Instance;
          return &Instance;
      }
  };

#endif

场景需要使用单例存储数据从OC传值到C++,C++读取使用.将数据加载到内存,而不是从文件中读取(安全性)

赋值

singleton *model = singleton::GetInstance();
model->bioData=bioPKey;

使用

singleton * model = singleton::GetInstance();
bioPKey = model->bioData;
evpPkey = model->signEvpPkey;