什么是C&中的原始内存? C ++? [英] What is raw memory in C & C++?

问题描述

很抱歉提出这个问题，但实际上我对此一无所知. 我已阅读以下常见问题解答条目: 我可以释放分配有new的指针吗?我可以删除通过malloc()分配的指针吗?

Sorry for asking this question, but actually I don't know about this. I have read in the following FAQ entry: Can I free() pointers allocated with new? Can I delete pointers allocated with malloc()?

此外，不能保证new和delete用于获取和释放原始内存的机制与malloc()和free()兼容.

我只想知道什么是原始内存"?

I just want to know that what is this "raw memory"?

推荐答案

原始内存"指的是内存块，被视为字节的非结构化数组.更高级别的语言将它们用作对象的存储.该程序通常与这些对象进行交互，而不是与低级字节值进行交互.

"Raw memory" refers to blocks of memory, treated as unstructured arrays of bytes. Higher-level languages use these as the storage for objects; the program usually interacts with these objects, not the low-level byte values.

在C ++中，可以使用两个不同的分配函数动态分配原始内存:

In C++, raw memory can be allocated dynamically using two different allocation functions:

• operator new，用于在使用new
创建对象时从免费商店进行分配 C库中的
• malloc

• operator new, used to allocate from the free store when you create an object using new
• malloc from the C library

由new分配的内存必须与delete一起释放；并且用malloc分配的内存必须用free释放.

Memory allocated by new must be released with delete; and memory allocated with malloc must be released with free.

您引用的行说明了这些可能使用不同的机制来管理分配.因此使用错误的函数来释放内存是错误的(例如，使用new分配内存并尝试使用free释放内存).

The line you quote explains that these might use different mechanisms to manage allocation; so that it's an error to use the wrong function to release memory (e.g. to allocate memory with new and try to release it with free).

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