C ++中带有boost :: ptr_vector的内存泄漏 [英] Leaking Memory In C++ With boost::ptr_vector

问题描述

我一直在从事一个项目，但是最近我检查程序是否泄漏，结果是泄漏很多.

I been working in a project, but recently I check if my program has some leaking and the results is that it's leaking and a lot.

我使用_CrtDumpMemoryLeaks();接收所有泄漏消息，并且检查它们中的大多数与boost有关，我知道这一定是我的问题，但我不明白为什么泄漏消息.

I use _CrtDumpMemoryLeaks(); to receive all the messages of leaking and I check that most of them are related with boost, I know that it must be my problem, but I can't understand why it's leaking.

在调试输出中，向我显示了以下几行:

In the debug output shows me these lines:

Dumping objects ->
{673} normal block at 0x00E075E0, 8 bytes long.
 Data: <H   @e  > 48 92 E0 00 40 65 E0 00 
{671} normal block at 0x00E065C0, 8 bytes long.
 Data: <@e      > 40 65 E0 00 00 00 00 00 
{669} normal block at 0x00E06540, 68 bytes long.
 Data: < e  mountains.pn> C0 65 E0 00 6D 6F 75 6E 74 61 69 6E 73 2E 70 6E 
{665} normal block at 0x00E063B0, 8 bytes long.
 Data: <H       > 48 92 E0 00 00 00 00 00 
{663} normal block at 0x00E09248, 68 bytes long.
 Data: < c  nubes.png   > B0 63 E0 00 6E 75 62 65 73 2E 70 6E 67 00 CD CD 

这使我相信问题出在我使用这些字符串的地方，而这些字符串的第一个调用是在这些行中:

Which leads me to believe that the problem is where I use those strings, and the first call with those are in these lines:

tutorialLevel->addLayerToList("nubes.png", 1600.f, 720.f, 1.0f, 0.0f, 0.1f, true);
tutorialLevel->addLayerToList("mountains.png", 1600.f, 720.f, speedXVectorPanda.at(0), 0.0f, 0.5f, false);

然后是实际功能addLayerToList:

void Level::addLayerToList(std::string name, GLfloat widthLayer, GLfloat heightLayer, GLfloat velX, GLfloat velY, 
                GLfloat constantX, bool hasRepetition)
{
    layersList.push_back( new Layer(name, widthLayer, heightLayer, velX, velY, constantX, hasRepetition) );
}

layersList的定义如下:

And layersList is define like this:

boost::ptr_vector< Layer > layersList;

也许，我误解了Boost中指针的所有权是如何工作的，但是在我最近检查的示例中，这是将对象所有权传递给ptr_vector的正确方法，对吗?

Maybe, I misunderstood how the ownership of pointers work in Boost, but in the examples I recently check, this is a correct way to pass ownership of the object to the ptr_vector, am I wrong?

我的另一个问题是，是否有必要释放向量的指针，还是最好让auto_ptr做他的工作?

And my other question is, if it's necessary release the pointers for the vector, or it's better leave the auto_ptr do his work?

感谢您的帮助.

推荐答案

取决于放置位置，但在几乎所有情况下，_CrtDumpMemoryLeaks不会不向您显示使用STL/BOOST时的真相智能指针.它将STL中new的用法视为内存泄漏.

Depending on where you placed it but in almost all cases, _CrtDumpMemoryLeaks will not show you the truth when using STL/BOOST smart pointers. It will see the usage of new within the STL as a memory leak.

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