Function blmoveGenericCommand

src/t_list.cpp:992–1012

}

void blmoveGenericCommand(client *c, int wherefrom, int whereto, mstime_t timeout) {
    robj *key = lookupKeyWrite(c->db, c->argv[1]);
    if (checkType(c,key,OBJ_LIST)) return;

    if (key == NULL) {
        if (c->flags & CLIENT_DENY_BLOCKING) {
            /* Blocking against an empty list when blocking is not allowed
             * returns immediately. */
            addReplyNull(c);
        } else {
            /* The list is empty and the client blocks. */
            struct listPos pos = {wherefrom, whereto};
            blockForKeys(c,BLOCKED_LIST,c->argv + 1,1,timeout,c->argv[2],&pos,NULL);
        }
    } else {
        /* The list exists and has elements, so
         * the regular lmoveCommand is executed. */
        serverAssertWithInfo(c,key,listTypeLength(key) > 0);
        lmoveGenericCommand(c,wherefrom,whereto);
    }
}

/* BLMOVE <source> <destination> (LEFT|RIGHT) (LEFT|RIGHT) <timeout> */
void blmoveCommand(client *c) {