i'm writing a number of short examples to demonstrate various
features of the kernel and modules, and i threw together the following
to represent using a workqueue to schedule something to run every
second. is this the accepted and sane way of doing this? it works,
but i'm wondering if there's a better way.
#include <linux/module.h> // for all modules
#include <linux/init.h> // for entry/exit macros
#include <linux/kernel.h> // for printk macros
#include <linux/workqueue.h>
static void work_func(struct work_struct *unused);
static DECLARE_DELAYED_WORK(work, work_func);
static int count ;
static void
work_func(struct work_struct *unused)
{
printk(KERN_INFO "yee ha timer, %d.\n", ++count);
schedule_delayed_work(&work, HZ); // one second from now
}
static int hi(void)
{
printk(KERN_INFO "Hello from timer.\n");
schedule_delayed_work(&work, HZ);
count = 0 ;
return 0;
}
static void bye(void)
{
printk(KERN_INFO "Goodbye from timer.\n");
cancel_delayed_work(&work);
flush_scheduled_work();
}
module_init(hi);
module_exit(bye);
MODULE_LICENSE("Dual BSD/GPL");
--
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://fsdev.net/wiki/index.php?title=Main_Page
========================================================================
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