Function unblockClientWaitingData

app/redis-6.2.6/src/blocked.c:678–712

Unblock a client that's waiting in a blocking operation such as BLPOP. * You should never call this function directly, but unblockClient() instead. */

/* Unblock a client that's waiting in a blocking operation such as BLPOP.
 * You should never call this function directly, but unblockClient() instead. */
void unblockClientWaitingData(client *c) {
    dictEntry *de;
    dictIterator *di;
    list *l;

    serverAssertWithInfo(c,NULL,dictSize(c->bpop.keys) != 0);
    di = dictGetIterator(c->bpop.keys);
    /* The client may wait for multiple keys, so unblock it for every key. */
    while((de = dictNext(di)) != NULL) {
        robj *key = dictGetKey(de);
        bkinfo *bki = dictGetVal(de);

        /* Remove this client from the list of clients waiting for this key. */
        l = dictFetchValue(c->db->blocking_keys,key);
        serverAssertWithInfo(c,key,l != NULL);
        listDelNode(l,bki->listnode);
        /* If the list is empty we need to remove it to avoid wasting memory */
        if (listLength(l) == 0)
            dictDelete(c->db->blocking_keys,key);
    }
    dictReleaseIterator(di);

    /* Cleanup the client structure */
    dictEmpty(c->bpop.keys,NULL);
    if (c->bpop.target) {
        decrRefCount(c->bpop.target);
        c->bpop.target = NULL;
    }
    if (c->bpop.xread_group) {
        decrRefCount(c->bpop.xread_group);
        decrRefCount(c->bpop.xread_consumer);
        c->bpop.xread_group = NULL;
        c->bpop.xread_consumer = NULL;
    }
}

static int getBlockedTypeByType(int type) {
    switch (type) {