if ((__builtin_constant_p(__cnt) && __builtin_constant_p(__size)) || \
!_dispatch_is_multithreaded()) { \
ptr = _os_calloc_known(_cnt, _size); \
if ((__builtin_constant_p(__cnt) && __builtin_constant_p(__size)) || \
!_dispatch_is_multithreaded()) { \
ptr = _os_calloc_known(_cnt, _size); \