aligned malloc free

void* aligned_malloc(size_t required_bytes, size_t alignment)

{

int offset = alignment - 1 + sizeof(void*);

void* p1 = (void*)malloc(required_bytes + offset);

if (p1 == NULL)

return NULL;

void** p2 = (void**)( ( (size_t)p1 + offset ) & ~(alignment - 1) );

p2[-1] = p1;

return p2;

}

void aligned_free(void *p2)

{

void* p1 = ((void**)p2)[-1];

free(p1);

}