unsigned long long byte_size = sizeof(union alloc_header) + data_bytes;
Dynamic AMOLED 2X, 120Hz adaptive refresh (1–120Hz), Up to 2,600 nits peak brightness
。业内人士推荐同城约会作为进阶阅读
unsigned long long length(void*data) {
of size 4. The old backing store of size 2 is now garbage.