Subj : Re: redhat linux standard C library does not have pthread_mutex_trylock ???
To   : comp.programming.threads
From : Joe Seigh
Date : Wed Feb 09 2005 07:15 am

On 08 Feb 2005 19:40:04 -0800, Paul Pluzhnikov <ppluzhnikov-nsp@charter.net> wrote:

> "Joe Seigh" <jseigh_01@xemaps.com> writes:

>
>> What do you think pthread_cond_wait is supposed to
>> do in that case?
>
> Return EINVAL immediately?
>
No, that's not what EINVAL means.  In a single threaded
environment, pthread_cond_wait blocks forever or until
it gets a spurious wakeup.  You could code the libc
stub version to be "{ return 0; }" but code properly
written to handle spurious wakeups would loop on
their condition test forever.

The libc pthread stub routines are only meant to be used
by libc functions that are aware of what part of the
pthread api is supported as stubs.  It's not a supported
api for your use.

-- 
Joe Seigh

Lock-free synchronization primitives
http://atomic-ptr-plus.sourceforge.net/

.