如何释放C ++ WinRT值结构的内存 [英] How to free memory of c++ WinRT value structs

问题描述

我是否必须以及如何从Windows运行时组件中创建的值结构中释放内存，该值结构已返回到托管C#项目中?

Do I have to, and how do I, free memory from a value struct created in a Windows Runtime Component that has been returned to a managed C# project?

我声明了结构

// Custom struct
public value struct PlayerData
{
    Platform::String^ Name;
    int Number;
    double ScoringAverage;
};

喜欢

auto playerdata = PlayerData();
playerdata.Name = ref new String("Bla");
return playerdata;

我是新来的释放内存的人，却不知道如何以及何时释放它. 任何人?

I'm new with freeing memory and haven't got a clue how and when to free this. Anyone?

推荐答案

将值结构分配给另一个变量时，将其成员进行复制，以便两个变量都被复制拥有自己的数据副本(请参见值类和结构(C ++/CX)).从函数返回值结构时，同样的规则适用.

When a value struct is assigned to another variable, its members are copied, so that both variables have their own copy of the data (see Value classes and structs (C++/CX)). The same rule applies, when returning a value struct from a function.

在代码中，您具有playerdata，这是类型为PlayerData的对象，具有自动存储持续时间. return语句复制playerdata(包括Platform::String^成员)，并将此副本返回给调用方.之后，playerdata超出范围，并被自动销毁.

In your code you have playerdata, an object of type PlayerData with automatic storage duration. The return statement makes a copy of playerdata (including the Platform::String^ member), and returns this copy to the caller. After that, playerdata goes out of scope, and is automatically destroyed.

换句话说:您发布的代码可以正常工作.您不必显式释放任何内存.

In other words: The code you posted works as expected. You do not have to explicitly free any memory.

这篇关于如何释放C ++ WinRT值结构的内存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！