pthread_mutex_timedlock with time in past

[Joel Sherrill]

Hi,

I was reviewing this code and wanted to
make sure that ...

+ lock is busy (e.g. unavailable)
+ absolute time is in the past

We should return ETIMEDOUT not EBUSY.

The OpenGroup page is this but I am missing
the exact phrase which tells us what to do.

http://www.opengroup.org/onlinepubs/009695399/functions/pthread_mutex_timedlock.html

Insight appreciated.

--joel