Date: Wed, 21 Jul 1999 08:30:38 -0700 From: "Jeff Hagendaz" <jeffhdz@my-Deja.com> To: freebsd-hackers@freebsd.org Subject: polling in device driver Message-ID: <IKCDDIIDOJENBAAA@my-deja.com>
next in thread | raw e-mail | index | archive | help
Hi,
I am reading a Linux device driver. At some point it
polls a device to check if it is ready. The timeout
is set to 5 second. It uses the system jiffies to
count the time:
u32 time_out = jiffies + 5 * HZ;
for (;;) {
/* code to check if dev is ready */
........
if (ready) break;
if (intr_count == 0) schedule();
if (jiffies > time_out) return ERROR;
}
How do I implement such polling in FreeBSD? Thanks.
--Jeff
--== Sent via Deja.com http://www.deja.com/ ==--
Share what you know. Learn what you don't.
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?IKCDDIIDOJENBAAA>