Ah, that life were that simple, I'd probably be out of a job in favor of one
or two less experienced programmers.
Of course, that's the goal, but it's not always possible to do perfect error
recovery, nor do I write bug-free code the first time. Maybe if you do, I
could convince my employer to offer you a position when I retire.
Norm
> -----Original Message-----
> From: Calin A. Culianu [SMTP:[EMAIL PROTECTED]]
> Sent: Monday, October 29, 2001 9:28 AM
> To: '[EMAIL PROTECTED]'
> Cc: '[EMAIL PROTECTED]'
> Subject: RE: [rtl] Follow-up: checking a pthread-ID
>
>
> Why do you need to check thread validity anyway? Write your program in
> such a way so that you don't constantly have to second-guess your
> pointers, is what I always say...
>
> On Fri, 26 Oct 2001, Dresner, Norman A. wrote:
>
> >
> > 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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