C ++静态类& shared_ptr内存泄漏 [英] C++ static classes & shared_ptr memory leaks
本文介绍了C ++静态类& shared_ptr内存泄漏的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我不明白为什么下面的代码产生内存泄漏(我使用 boost :: shared_ptr
与静态类实例)。有人可以帮助我吗?
I can't understand why does the following code produce memory leaks (I am using boost::shared_ptr
with static class instance). Could someone help me?
#include <crtdbg.h>
#include <boost/shared_ptr.hpp>
using boost::shared_ptr;
#define _CRTDBG_MAP_ALLOC
#define NEW new(_NORMAL_BLOCK, __FILE__, __LINE__)
static struct myclass {
static shared_ptr<int> ptr;
myclass() {
ptr = shared_ptr<int>(NEW int);
}
} myclass_instance;
shared_ptr<int> myclass::ptr;
int main() {
_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF |
_CRTDBG_CHECK_ALWAYS_DF | _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG));
return 0;
}
推荐答案
报告一个假阳性 - 下面的代码说明了共享指针正常工作,至少用g ++
At a guess the CRT is reporting a false positive - the following code illustrates that the shared pointer is working correctly, at least with g++
#include <iostream>
#include "boost/shared_ptr.hpp"
using namespace std;
using namespace boost;
struct R {
R() {
cerr << "ctor" << endl;
}
~R() {
cerr << "dtor" << endl;
}
};
struct A {
static shared_ptr<R> ptr;
A() {
ptr = shared_ptr<R>(new R);
}
};
shared_ptr<R> A::ptr;
static A a;
int main() {
}
ctor
dtor
这篇关于C ++静态类& shared_ptr内存泄漏的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文