I can't believe that I'm the only one facing this problem. Could we agree
on the name of a future library routine or preprocessor macro that will be
provided for validity checking which I could use in the near-term with my
own code?
Norm
> -----Original Message-----
> From: Victor Yodaiken [SMTP:[EMAIL PROTECTED]]
> Sent: Thursday, October 25, 2001 9:12 PM
> Cc: rtlinux
> Subject: Re: [rtl] Follow-up: checking a pthread-ID
>
> On Thu, Oct 25, 2001 at 08:56:14PM -0400, Norm Dresner wrote:
> > While browsing the code in v3.0's rtl_sched.c &
> > rtl_sched.h, I found that, within the RTL context, a
> > pthread_t points to a structure of type rtl_thread_struct
> > which contains an int-item magic and that a "valid"
> > rtl_thread_struct will have this value equal to the
> > constant RTL_THREAD_MAGIC.
> >
> > How safe is it to assume that this will always be the case
> > and that I can implement a thread validity check with
> > #define rtlTHREAD_VALID( th )
> > ( (th)->magic ) == RTL_THREAD_MAGIC )
> > and be safe if I -- or another programmer who takes over
> > program maintenance from me in the unspecified future
> > upgrades to a newer version of rtl?
>
> Not safe at all! If you hide the implementation well, that's ok
> since there should always be a way to check or at least semi-check
> validity, but I hope to move pthread_t to something else in the next
> year or two - it is an opaque type for a reason.
>
>
>
> >
> >
> > Thanks
> > Norm
> >
> >
> > ----- Original Message -----
> > From: Norm Dresner <[EMAIL PROTECTED]>
> > To: rtlinux <[EMAIL PROTECTED]>
> > Sent: Thursday, October 25, 2001 8:42 PM
> > Subject: checking a pthread-ID
> >
> >
> > > According to the map-page, pthread_wakeup_np always
> > returns
> > > a zero value and consequently can't be used to determine
> > if
> > > the target thread in fact no longer exists. I have two
> > > questions:
> > > 1. What -- if anything -- will happen if the thread
> > has
> > > been destroyed, i.e. either it has executed
> > pthread_exit()
> > > or some other process/thread has already killed it with
> > > pthread_delete_np()?
> > > 2. Is there any safe function to call to verify that
> > > the target of a pthread_t still is a valid thread?
> > >
> > > TIA
> > > Norm
> > >
> > >
> >
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