Function RM_SetExpire

app/redis-6.2.6/src/module.c:2378–2388

Set a new expire for the key. If the special expire * REDISMODULE_NO_EXPIRE is set, the expire is cancelled if there was * one (the same as the PERSIST command). * * Note that the expire must be provided as a positive integer representing * the number of milliseconds of TTL the key should have. * * The function returns REDISMODULE_OK on success or REDISMODULE_ERR if * the key was not open

 * The function returns REDISMODULE_OK on success or REDISMODULE_ERR if
 * the key was not open for writing or is an empty key. */
int RM_SetExpire(RedisModuleKey *key, mstime_t expire) {
    if (!(key->mode & REDISMODULE_WRITE) || key->value == NULL || (expire < 0 && expire != REDISMODULE_NO_EXPIRE))
        return REDISMODULE_ERR;
    if (expire != REDISMODULE_NO_EXPIRE) {
        expire += mstime();
        setExpire(key->ctx->client,key->db,key->key,expire);
    } else {
        removeExpire(key->db,key->key);
    }
    return REDISMODULE_OK;
}

/* Return the key expire value, as absolute Unix timestamp.
 * If no TTL is associated with the key or if the key is empty,