Does realloc of memory allocated by C11 aligned_alloc keep the alignment?

Question

Consider the following (C11) code:

void *ptr = aligned_alloc(4096, 4096);
... // do something with \'ptr\'
ptr = realloc(ptr, 6000);

Since the

Answer 1

The alignment is not kept with the pointer. When you call realloc you can only rely on the alignment that realloc guarantees. You'll need to use aligned_alloc to perform any reallocations.