malloc() 与 HeapAlloc()

问题描述

malloc() 和 HeapAlloc() 有什么区别?据我了解 malloc 从堆中分配内存，就像 HeapAlloc 一样，对吗?

What is the difference between malloc() and HeapAlloc()? As far as I understand malloc allocates memory from the heap, just as HeapAlloc, right?

那有什么区别?

谢谢！

推荐答案

他们都从堆分配内存是对的.但也有区别:

You are right that they both allocate memory from a heap. But there are differences:

• malloc() 是可移植的，是标准的一部分.
• HeapAlloc() 不可移植，它是一个 Windows API 函数.

• malloc() is portable, part of the standard.
• HeapAlloc() is not portable, it's a Windows API function.

很可能，在 Windows 上，malloc 将在 HeapAlloc 之上实现.我希望 malloc 比 HeapAlloc 快.

It's quite possible that, on Windows, malloc would be implemented on top of HeapAlloc. I would expect malloc to be faster than HeapAlloc.

HeapAlloc 比 malloc 具有更大的灵活性.特别是它允许您指定要从哪个堆分配.这迎合了每个进程的多个堆.

HeapAlloc has more flexibility than malloc. In particular it allows you to specify which heap you wish to allocate from. This caters for multiple heaps per process.

对于几乎所有的编码场景，您将使用 malloc 而不是 HeapAlloc.虽然因为你标记了你的问题 C++，我希望你使用 new!

For almost all coding scenarios you would use malloc rather than HeapAlloc. Although since you tagged your question C++, I would expect you to be using new!

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