Function RM_ListPush

src/module.cpp:2652–2659

Push an element into a list, on head or tail depending on 'where' argument. * If the key pointer is about an empty key opened for writing, the key * is created. On error (key opened for read-only operations or of the wrong * type) REDISMODULE_ERR is returned, otherwise REDISMODULE_OK is returned. */

 * is created. On error (key opened for read-only operations or of the wrong
 * type) REDISMODULE_ERR is returned, otherwise REDISMODULE_OK is returned. */
int RM_ListPush(RedisModuleKey *key, int where, RedisModuleString *ele) {
    if (!(key->mode & REDISMODULE_WRITE)) return REDISMODULE_ERR;
    if (key->value && key->value->type != OBJ_LIST) return REDISMODULE_ERR;
    if (key->value == NULL) moduleCreateEmptyKey(key,REDISMODULE_KEYTYPE_LIST);
    listTypePush(key->value, ele,
        (where == REDISMODULE_LIST_HEAD) ? QUICKLIST_HEAD : QUICKLIST_TAIL);
    return REDISMODULE_OK;
}

/* Pop an element from the list, and returns it as a module string object
 * that the user should be free with RM_FreeString() or by enabling