Date: Wed, 21 Jul 1999 16:20:48 -0700 From: "Jeff Hagendaz" <jeffhdz@my-Deja.com> To: freebsd-questions@freebsd.org Subject: polling in device driver Message-ID: <BALPOCGFGEOOBAAA@my-deja.com>
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Hi, I asked this in -hackers, but didn't get an answer. Guess it is too simple to quanlify into -hackers, I am moving it here. Your help is highly appreciated. -- Jeff 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-questions" in the body of the message
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