Subj : Re: Predicate for pthread_cond_timedwait() ??
To   : comp.programming.threads
From : David Schwartz
Date : Thu Mar 17 2005 03:22 pm


<recvfrom@gmail.com> wrote in message 
news:1111096787.348777.186010@g14g2000cwa.googlegroups.com...

> Thanks so much for your response!!!  All good pointers.  I may
> try nanosleep too -- a bit more code to cover the interrupt case,
> but the intent is more obvious.  Thanks again!

    I almost forgot to tell you about 'select'. If you use 'select' with 
NULL pointers for all the fd sets, it can act as a sleep function too. In 
order of preference, here's what I suggest:

    1) If you're using GNU PTH or something other than pthreads, use its 
sleep function.

    2) If you have 'nanosleep', use it

    3) If you're on OSF1 or another OS that has a non-portable sleep 
function (like 'pthread_delay_np'), use it.

    4) If you have 'usleep', use it. (Caution: Likely will not work for 
times greater than one second, use 'sleep' for that.) In fact, you probably 
don't want to use 'usleep' or 'sleep'.

    5) Use 'select'.

    DS

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