Erik Slagter wrote:
> So I guess it's up to you to ignore signals in threads that do not have
> a signal handler installed by alsa. I guess you need to make a piece of
> code that queries the current signal handler for SIGIO and if it's
> non-null, leave it, otherwise have SIGIO ignored and do this in every
> thread, after alsa initialization.
A better method may be:
- Block SIGIO (using sigprocmask SIG_BLOCK) early in main(), before
creating any threads or calling libraries which will.
- When ALSA initializes, presumably it will install a SIGIO handler
and unblock SIGIO in its thread.
That ensures the SIGIO is always delivered to ALSA's thread(s), and
never to any other threads.
-- Jamie
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