Subj : Re: pthread_cond_timedwait problems
To   : comp.programming.threads
From : David Schwartz
Date : Sat Aug 13 2005 07:50 pm


<markh@compro.net> wrote in message 
news:1123961265.707957.37810@g47g2000cwa.googlegroups.com...

> Whats going on here???? I don't see anything wrong with the program.
> Is there something wrong here with this code or is a BUG??

    There are two obvious bugs:

    1) You just add the number of nanoseconds you want to wait to the 
current time. This can cause serious problems. For example, if it's 8:53 and 
you want to wait for 10 minutes, you don't want to wait until 8:63, do you?

    2) You call pthread_cond_timedwait without holding the associated mutex. 
So what's supposed to happen when pthread_cond_timedwait tries to release 
the mutex before it waits?

    DS

.