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On Wed, 13 Dec 2000, Pavel Petrovic wrote:
> I am looking for a way how to obtain an identifier of a calling
> thread/process... I have to distinguish between different threads
> in the code and thus missing some equivalent to UNIX-like
>
> thr_self() / pthread_self() / getpid()
>
> any ideas/tricks how to easily implement this in legOS?
AFAIK there aren't any built-in mechanisms. However, when a thread is
launched, the launching process does get its PID as a return value from
execi(). I'm thinking you could pass in a pointer to some storage in the
argv, and then update that storage in the calling thread once execi()
returns. Something like: (Not tested or even compiled, not guaranteed to
work AT ALL!)
int *pidptr = malloc(sizeof(int));
int pid = execi(MyFunction, 0, (char **)pidptr, PRIO_NORMAL,
DEFAULT_STACK_SIZE);
*pidptr = pid;
You would probably want to include some kind of way to indicate to
MyFunction just when the pointer becomes valid. Implementing that is left
as an exercise to the reader. :) Anyway, I hope this helps. Just out of
curiosity, why do you need this?
--
"Say not, 'I have found the truth,' but rather, 'I have found a truth.'
"Say not, 'I have found the path of the soul.' Say rather, 'I have met the
soul walking upon my path.'" -- Khalil Gibran
Mike Ash - <http://www.mikeash.com/>, <mailto:mail@mikeash.com>
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Message has 1 Reply:
 | | Re: getpid?
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| (...) this is not exactly what I meant. What I am looking for is how can a piece of code determine which process is currently executing it. something like: main(...) ... create 2 processes with pid1, pid2 ... these processes occasionally call (...) (24 years ago, 14-Dec-00, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | getpid?
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| Hello, I am looking for a way how to obtain an identifier of a calling thread/process... I have to distinguish between different threads in the code and thus missing some equivalent to UNIX-like thr_self() / pthread_self() / getpid() any (...) (24 years ago, 13-Dec-00, to lugnet.robotics.rcx.legos)
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