Halil Demirezen wrote:
Hello,
First of all, I am not sure if this is the correct mail list with posting this
mail. I apologize for that.. Second, I may seem to have little
C knowledge, though I am using C for about 5 years and plus.
Let's start with the question. I am digging the FreeBSD-5.3 kernel codes.
Watson's Cross Reference is really helpful. In the schedcpu(void) function
there is an assignment like "ke = td->td_kse;" on line 438 (see:
http://fxr.watson.org/fxr/source/kern/sched_4bsd.c?v=RELENG53#L438";).
When I look at the thread structure at sys/proc.h, I could not see such an
entry td_kse in the "thread" structure. How has this structure been extended
or this entry added to the thread structure?
Although the kernel codes seem to be simply understandable, there still lies
some difficulties to understand for an average C programmer: magic stuff done
by professionals. :)
Anyway, any help really will be appreciated...
Thanks.
Look near the top of the file for:
#define td_kse td_sched
That makes td->td_kse resolve to td->td_sched. Now, there is
other magic associated with td_sched in each scheduler source
file, but that's different matter =-)
Scitt
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