in src/ds/aba.h [156:168]
Cmp read()
{
while (lock.test_and_set(std::memory_order_acquire))
Aal::pause();
# if !defined(NDEBUG) && !defined(SNMALLOC_DISABLE_ABA_VERIFY)
if (operation_in_flight)
error("Only one inflight ABA operation at a time is allowed.");
operation_in_flight = true;
# endif
return Cmp{this};
}