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?
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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