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Diffstat (limited to 'NOTES')
| -rw-r--r-- | NOTES | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -32,3 +32,22 @@ assert() to catch with a debugger, in addition to parameter debugging. This feature is disabled when --with-debug=no is passed to configure, i.e. no strict checking is done in alsa-lib. + + +Blocking Open Mode +================== + +The default behavior of blocking at snd_pcm_open is changed to +non-blocking since version 1.0.11. That is, snd_pcm_open() returns +-EAGAIN immediately when the device is in use and cannot be opened, +while the function was blocked in the former version. This influences +only on the opening behavior. The behavior of the further access, +read/write, poll or commit, are not changed. They follow the extra +flag argument of snd_pcm_open() as well as the former version. + +For taking back the compatible behavior of open blocking mode, set + + defaults.pcm.nonblock 0 + +in /etc/asound.conf or ~/.asoundrc file. + |