### Storage capacity tracking

times // in a row. if retries++; retries > 100 { panic("fips140/drbg: failed to obtain initial entropy") } seed, err = entropy.Seed(&memory) } return &seed } // getEntropy is very slow (~500µs), so we don't want it on the hot path. // We keep both a persistent DRBG instance and a pool of additional instances. // Occasional uses will use drbgInstance, even if the pool was emptied since the // last use. Frequent concurrent uses will fill the pool and use it. var drbgInstance atomic.Pointer[Counter] var...