Function _dictRehashStep

src/dict.cpp:599–603

This function performs just a step of rehashing, and only if hashing has * not been paused for our hash table. When we have iterators in the * middle of a rehashing we can't mess with the two hash tables otherwise * some element can be missed or duplicated. * * This function is called by common lookup or update operations in the * dictionary so that the hash table automatically migrates from

 * dictionary so that the hash table automatically migrates from H1 to H2
 * while it is actively used. */
static void _dictRehashStep(dict *d) {
    int16_t pauserehash;
    __atomic_load(&d->pauserehash, &pauserehash, __ATOMIC_RELAXED);
    if (pauserehash == 0) dictRehash(d,1);
}

/* Add an element to the target hash table */
int dictAdd(dict *d, void *key, void *val, dictEntry **existing)