在一次采访中，有人问我
假设您有 25 MB 的内存，并且您有 3 个每个 10 MB 的进程。如何确保您的进程不会耗尽内存？
我回答说，如果我使用placement new它就会存活下来。他们问我和你placement new有什么关系realloc？
我想知道placement new真的有关系realloc吗？
问问题
112 次
1 回答
1
realloc isn't really valid with placement new. Since the memory might end up in a new location, any pointers referring to the object will become invalidated, especially the pointers contained within the objects themselves. Think of a linked list for example.
The interviewer was probably looking for a mention of virtual memory.
于 2013-10-07T04:47:22.743 回答