对C ++中动态分配的内存进行碎片整理 [英] Defragmentation of dynamically allocated memory in C++

问题描述

如何在C ++中对动态分配的内存(使用new和malloc运算符分配)进行碎片整理?

How does the defragmentation of dynamically allocated memory (allocated using the new and malloc operator ) work in C++?

推荐答案

C ++堆中没有碎片整理，因为应用程序可以自由保留指向已分配内存的指针.因此，堆管理器无法移动已分配的内存.唯一可能的碎片整理"是如果您释放两个相邻的块.然后，堆管理器会将这两个块合并为一个更大的空闲块，可再次用于分配.

There is no defragmentation in the C++ heap because the application is free to keep pointers to allocated memory. Thus the heap manager cannot move memory around that is already allocated. The only "defragmentation" possible is if you free two adjacent blocks. Then the heap manager will combine the two blocks to a single larger free block that can be used for allocation again.

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