博客
关于我
C++ 模版实现自定义释放类对象成员的堆内存空间
阅读量:584 次
发布时间:2019-03-11

本文共 941 字,大约阅读时间需要 3 分钟。

#include 
using namespace std;template
class AutoRelease{ typedef void (Type::* pFunc)(void);public: AutoRelease(Type* p, pFunc pfunc) :m_class(p), m_pFunc(pfunc) {} ~AutoRelease() { cout<< "release memory"<
*m_pFunc)(); }private: Type* m_class; pFunc m_pFunc;};class TestClass{public: TestClass(){cout<<"TestClass()"<
autoR(this, &TestClass::release); cout<<"excute()"<
testMem(); } void testMem(void) { if(NULL == ptr) { cout<< "ptr is NULL" <
tempVal<
excute(); p->testMem(); cout << (NULL==p)<< endl; p->excute(); p->testMem(); delete p; TestClass* p1 =new TestClass; p1->tempVal = 100; delete p1; delete p1; /* 把p1=NULL 的注释打开和关闭,运行对比下。 可以参考 深入探究C++对象模型 中“成员函数调用” 解释 */ //p1 = NULL; p1->testMem(); p1->testInt(); //思考:为什么delete之后还可以执行? NULL 还可以调用成员函数? p1->testInt(); p1->testInt(); return 0;}

转载地址:http://oiavz.baihongyu.com/

你可能感兴趣的文章
NN&DL4.7 Parameters vs Hyperparameters
查看>>
NN&DL4.8 What does this have to do with the brain?
查看>>
nnU-Net 终极指南
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
No 'Access-Control-Allow-Origin' header is present on the requested resource.
查看>>
NO 157 去掉禅道访问地址中的zentao
查看>>
no available service ‘default‘ found, please make sure registry config corre seata
查看>>
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
查看>>
no connection could be made because the target machine actively refused it.问题解决
查看>>
No Datastore Session bound to thread, and configuration does not allow creation of non-transactional
查看>>
No fallbackFactory instance of type class com.ruoyi---SpringCloud Alibaba_若依微服务框架改造---工作笔记005
查看>>
No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalanc
查看>>
No mapping found for HTTP request with URI [/...] in DispatcherServlet with name ...的解决方法
查看>>
No mapping found for HTTP request with URI [/logout.do] in DispatcherServlet with name 'springmvc'
查看>>
No module named 'crispy_forms'等使用pycharm开发
查看>>
No module named 'pandads'
查看>>
No module named cv2
查看>>
No module named tensorboard.main在安装tensorboardX的时候遇到的问题
查看>>
No module named ‘MySQLdb‘错误解决No module named ‘MySQLdb‘错误解决
查看>>
No new migrations found. Your system is up-to-date.
查看>>