usage of snd_rawmidi_status_get_avail()

[GitHub issues - edited]

alsa-project/alsa-lib issue #26 was edited from MusicMaker:

In non blocked raw MIDI, is snd_rawmidi_status_get_avail supposed to return the number of available bytes that can be read using a snd_rawmidi_read. (port is opened for input only)  It seems get_avail always returns 0 even there is MIDI data when using a read.  Else is there a(nother) way to find the number of unread received bytes in the buffer?
snd_rawmidi_status_alloca (&status);  	
snd_rawmidi_status(client, status); 
snd_rawmidi_status_get_avail(status);

Issue URL     : https://github.com/alsa-project/alsa-lib/issues/26
Repository URL: https://github.com/alsa-project/alsa-lib