16 void *al_malloc(size_t alignment, size_t size)
18 assert((alignment & (alignment-1)) == 0);
19 alignment = std::max(alignment, alignof(std::max_align_t));
21 #if defined(HAVE_POSIX_MEMALIGN)
23 if(posix_memalign(&ret, alignment, size) == 0)
26 #elif defined(HAVE__ALIGNED_MALLOC)
27 return _aligned_malloc(size, alignment);
29 size_t total_size{size + alignment-1 + sizeof(void*)};
30 void *base{std::malloc(total_size)};
33 void *aligned_ptr{static_cast<char*>(base) + sizeof(void*)};
34 total_size -= sizeof(void*);
36 std::align(alignment, size, aligned_ptr, total_size);
37 *(static_cast<void**>(aligned_ptr)-1) = base;
44 void *al_calloc(size_t alignment, size_t size)
46 void *ret{al_malloc(alignment, size)};
47 if(ret) std::memset(ret, 0, size);
51 void al_free(void *ptr) noexcept
53 #if defined(HAVE_POSIX_MEMALIGN)
55 #elif defined(HAVE__ALIGNED_MALLOC)
59 std::free(*(static_cast<void**>(ptr) - 1));