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WorkQueue : delay work queue

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zeroway
2018-11-15 09:41:26 +08:00
parent 0ac33dab88
commit 4a0501784e
2 changed files with 54 additions and 0 deletions
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1
debug/workqueue/Makefile
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@ -16,6 +16,7 @@ endif
obj-m := workq_test.o
obj-m += workq_test2.o
obj-m += workq_test3.o
KERNEL_DIR ?= /lib/modules/$(shell uname -r)/build
KERNEL_BUID_OUTPUT ?=$(KERNEL_DIR)
CC = $(CROSS_COMPILE)gcc

53
debug/workqueue/workq_test3.c Normal file
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@ -0,0 +1,53 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
struct self_define_struct *g_sds; /* just for free sds memory */
struct self_define_struct {
struct delayed_work mywork;
};
static int g_cnt = 0;
static void mywork_handler(struct delayed_work *dwork)
{
struct self_define_struct *sds = container_of(dwork, struct self_define_struct, mywork);
printk("%s, %d[%d]\n", __FUNCTION__, __LINE__, g_cnt++);
/* do work again */
schedule_delayed_work(&sds->mywork, msecs_to_jiffies(500 + g_cnt * 100));
}
static int workq_test_init(void)
{
struct self_define_struct *sds;
sds = kzalloc(sizeof(struct self_define_struct), GFP_KERNEL);
if (sds == NULL)
return -ENOMEM;
/* for free the memory */
g_sds = sds;
printk("%s, %d\n", __FUNCTION__, __LINE__);
/* init mywork */
INIT_DELAYED_WORK(&sds->mywork, mywork_handler);
/* do my work */
schedule_delayed_work(&sds->mywork, msecs_to_jiffies(500));
return 0;
}
static void workq_test_exit(void)
{
printk("%s, %d\n", __FUNCTION__, __LINE__);
cancel_delayed_work_sync(&g_sds->mywork);
kfree(g_sds);
}
module_init(workq_test_init)
module_exit(workq_test_exit)
MODULE_LICENSE("GPL");