The right solution when using atomics is to use a binary semaphore instead of condition variables, and implement the wait as if (!cond) { sem.try_acq

The right solution when using atomics is to use a binary semaphore instead of condition variables, and implement the wait as if (!cond) { sem.try_acquire(); if (!cond) { sem.acquire(); } } Though this only works if there is a single waiter.