How to allocate and free aligned memory in C

Question

How do you allocate memory that\'s aligned to a specific boundary in C (e.g., cache line boundary)? I\'m looking for malloc/free like implementation that ideally would be as po

Answer 1

Use posix_memalign/free.

int posix_memalign(void **memptr, size_t alignment, size_t size); 

void* ptr;
int rc = posix_memalign(&ptr, alignment, size);
...
free(ptr)

posix_memalign is a standard replacement for memalign which, as you mention is obsolete.