zad5 lab6

#include <linux/module.h>


#define SECONDS_DELAY 2


static int counter = 1;


static void delayed_work_handler(struct work_struct *work);


static struct workqueue_struct *queue;


static DECLARE_DELAYED_WORK(delayed_work, delayed_work_handler);

static void delayed_work_handler(struct work_struct *work)
{
	pr_info("Work number: %d\n", counter++);


	if (!queue_delayed_work(queue, &delayed_work, SECONDS_DELAY * HZ))
		pr_info("The delayed work was already queued!\n");
}


static int __init program_init(void)
{

	queue = create_singlethread_workqueue("work");

	if (IS_ERR(queue)) {
		pr_alert("Error creating a workqueue: %ld\n", PTR_ERR(queue));
		return -ENOMEM;
	}

	if (!queue_delayed_work(queue, &delayed_work, SECONDS_DELAY * HZ))
		pr_info("The delayed work was already queued!\n");

	return 0;
}


static void __exit program_exit(void)
{

	if (!IS_ERR(queue)) {

		if (cancel_delayed_work(&delayed_work))
			pr_info("Deleting delayed work!\n");

		destroy_workqueue(queue);
	}
}

module_init(program_init);
module_exit(program_exit);

MODULE_AUTHOR("Mateusz Nachyla Mateusz Orlowski");
MODULE_DESCRIPTION("Zad 5");
MODULE_LICENSE("GPL");