c++ - 如果 "delete this"不需要访问 "somethings"，那么在 "this"之后做某事是否安全？

Question

例如，我有一个具有保留计数的类和一个释放方法，如果保留计数为 0，该方法可以删除自身:

class MyClass{
public:
    void retain(){
        this->retainCount++;
    }

    void release(){
        this->retainCount--;
        if(this->retainCount==0){
            delete this;
        }

        printf("release called");
        MyClass::deleteCount++;
        FileOutputStream* fio=new FileOutputStream();
        fio->generateLog();
        delete fio;
        EmailUtils::sendEmailAboutMemoryUsage();
    }
protected:
    int retainCount;
    static int deleteCount;
}

删除对象后我可能需要做一些代码:

printf("release called");
MyClass::deleteCount++;
FileOutputStream* fio=new FileOutputStream();
fio->generateLog();
delete fio;
EmailUtils::sendEmailAboutMemoryUsage();

我的问题是，如果删除后的代码块不需要任何访问权限，那么删除对象后继续执行代码是否安全？

Answer 1

Here's an entry of the isocpp FAQ about this issue.

As long as you’re careful, it’s okay (not evil) for an object to commit suicide (delete this).

基本上，如果您在delete this 之后没有调用任何成员函数或访问任何成员变量，它可能没问题。

查看链接了解详情。