When minus value is given as a parameter, the API returns whether the caller has already subscribed or not.
This commit adds a comment about this so as better documentation.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- src/control/control.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/control/control.c b/src/control/control.c index dd428a1..4a28cf6 100644 --- a/src/control/control.c +++ b/src/control/control.c @@ -213,7 +213,7 @@ int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsign /** * \brief Ask to be informed about events (poll, #snd_async_add_ctl_handler, #snd_ctl_read) * \param ctl CTL handle - * \param subscribe 0 = unsubscribe, 1 = subscribe + * \param subscribe 0 = unsubscribe, 1 = subscribe, -1 = check subscribe or not * \return 0 on success otherwise a negative error code */ int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)