Re: Possible 2.6.24-rc7 issue w/respect to pthreads

[Marc Kleine-Budde <mkl@pengutronix.de>]

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tom@kavaga.com wrote:
> To Whom It May Concern,
> 
> After I patched my 2.6.23 kernel to 2.6.24-rc7 this morning, I noticed
> some odd behavior with respect to POSIX threads in a test program I had
> written (originally to test epoll.)
> 
> The behavior is as follows:
> 
> 1.  main() creates a new thread of execution with pthread_create
> 2.  thread_func() immediately calls pthread_detach(), which is supposed to
> ensure that thread resources are cleaned up when the thread terminates.
> 3.  The spawned thread sleeps and then prints a message "got here"
> 4.  The main thread calls pthread_join().  According to the POSIX
> documentation, this should suspend execution until the spawned thread has
> terminated.

Quoting the man page of pthread_detach():

After pthread_detach completes, subsequent attempts to perform
pthread_join on th will fail.

regard - Marc
-- 
 Marc Kleine-Budde              Phone: +49-231-2826-924
 Pengutronix - Linux Solutions for Science and Industry
 Vertretung West/Dortmund     http://www.pengutronix.de


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