Date: Mon, 12 Sep 2011 10:42:40 +0200 From: Filippo Sironi <filippo.sironi@gmail.com> To: Riccardo Cattaneo <cattaneo.riccardo@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Kernel timers infrastructure Message-ID: <C0EB65E5-323A-4BB9-BCAA-4EF9E071E751@gmail.com> In-Reply-To: <023BD0FF-053C-4DCB-81EA-5D69B2411819@gmail.com> References: <023BD0FF-053C-4DCB-81EA-5D69B2411819@gmail.com>
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This is what I wrote for FreeBSD 7.2 and it does not work:
--------------------------------------------------------------------------------
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/systm.h>
static struct callout timer_callout;
static void
timer_function(void *arg)
{
if (callout_reset(&timer_callout, hz, timer_function, NULL))
uprintf("callout_reset() != 0\n");
uprintf("Hello, World!\n");
}
static int
timer_event_handler(struct module *mod, int cmd, void *arg)
{
switch (cmd) {
case MOD_LOAD:
callout_init(&timer_callout, CALLOUT_MPSAFE);
if (callout_reset(&timer_callout, hz, timer_function, NULL))
uprintf("callout_reset() != 0\n");
break;
case MOD_UNLOAD:
callout_drain(&timer_callout);
break;
case MOD_SHUTDOWN:
break;
default:
return EOPNOTSUPP;
}
return 0;
}
static struct moduledata timer_moduledata = {
"timer",
timer_event_handler,
NULL
};
DECLARE_MODULE(timer, timer_moduledata, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
--------------------------------------------------------------------------------
but I do not know why...
I basically run through many different examples I found within the kernel and they are not different from this module.
Does anyone see any clear issue?
Filippo
On 10/set/2011, at 19:39, Riccardo Cattaneo wrote:
> Hi all,
> Me in the same situation: university project, freebsd os, required to call a certain function X times/second (say, uprintf).
> Got no luck till now :(
> Thanks
> Riccardo_______________________________________________
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> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
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help
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