[email protected] wrote:
>
>
>
>
> -------- Original Message --------
> Subject: Re: :: rt_printf with daemonized task (20-Okt-2009 11:33)
> From: Jan Kiszka <[email protected]>
> To: [email protected]
>
>> See http://thread.gmane.org/gmane.linux.real-time.xenomai.devel/6571 for
>> an example of a patch that may (but need not) be generated via git. What
>> counts is the format: proper title, a few lines of description, signed-off.
>>
>> HTH,
>> Jan
>>
>
> ok, here is my next trial for a proper patch
>
That format looks good.
Thanks,
Jan
>
> Oliver
>
>
> ----------------------------------------------------------------------------------------------
>
> Subject : Fork-save use of rt_print
>
> Fork save initialisation of rt_print library, necessary child initialisation
> are
> done via pthread_atfork() when child process is started.
>
> Signed-off-by: Oliver Schlenker <oliver.schlenker <at> sm motion control.de>
> ---
>
> --- rt_print.c.original 2008-09-10 10:36:27.000000000 +0200
> +++ rt_print.c.forkonly 2009-10-16 16:19:25.949289800 +0200
>
> }
> }
>
> -void __rt_print_init(void)
> +static void spawn_printer_thread(void)
> {
> pthread_attr_t thattr;
> +
> + pthread_attr_init(&thattr);
> + pthread_attr_setstacksize(&thattr, PTHREAD_STACK_MIN);
> + pthread_create(&__printer_thread, &thattr, printer_loop, NULL);
> +}
> +
> +static void forked_child_init(void)
> +{
> + struct print_buffer *my_buffer = pthread_getspecific(__buffer_key);
> + struct print_buffer **pbuffer = &__first_buffer;
> +
> + /* re-init to avoid finding it locked by some parent thread */
> + pthread_mutex_init(&__buffer_lock, NULL);
> +
> + while (*pbuffer) {
> + if (*pbuffer == my_buffer)
> + pbuffer = &(*pbuffer)->next;
> + else
> + cleanup_buffer(*pbuffer);
> + }
> +
> + spawn_printer_thread();
> +}
> +
> +void __rt_print_init(void)
> +{
> const char *value_str;
> unsigned long long period;
>
>
> pthread_mutex_init(&__buffer_lock, NULL);
> pthread_key_create(&__buffer_key, (void (*)(void*))cleanup_buffer);
>
> - pthread_attr_init(&thattr);
> - pthread_attr_setstacksize(&thattr, PTHREAD_STACK_MIN);
> - pthread_create(&__printer_thread, &thattr, printer_loop, NULL);
> + spawn_printer_thread();
> + pthread_atfork(NULL, NULL, forked_child_init);
> }
>
>
>
>
> To: [email protected]
> Cc: [email protected]
> [email protected]
--
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux
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