RT-Thread API参考手册  3.1.1
嵌入式实时操作系统
调度器钩子函数

在调度器钩子中打印线程切换信息 更多...

在调度器钩子中打印线程切换信息

源码

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-08-24 yangjie the first version
*/
/*
* 程序清单:调度器钩子
* 在调度器钩子中打印线程切换信息
*/
#include <rtthread.h>
#define THREAD_STACK_SIZE 1024
#define THREAD_PRIORITY 20
#define THREAD_TIMESLICE 10
/* 针对每个线程的计数器 */
volatile rt_uint32_t count[2];
/* 线程1、2共用一个入口,但入口参数不同 */
static void thread_entry(void *parameter)
{
rt_uint32_t value;
value = (rt_uint32_t)parameter;
while (1)
{
rt_kprintf("thread %d is running\n", value);
rt_thread_mdelay(1000); //延时一段时间
}
}
static rt_thread_t tid1 = RT_NULL;
static rt_thread_t tid2 = RT_NULL;
static void hook_of_scheduler(struct rt_thread *from, struct rt_thread *to)
{
rt_kprintf("from: %s --> to: %s \n", from->name, to->name);
}
int scheduler_hook(void)
{
/* 设置调度器钩子 */
rt_scheduler_sethook(hook_of_scheduler);
/* 创建线程1 */
tid1 = rt_thread_create("thread1",
thread_entry, (void *)1,
THREAD_STACK_SIZE,
THREAD_PRIORITY, THREAD_TIMESLICE);
if (tid1 != RT_NULL)
/* 创建线程2 */
tid2 = rt_thread_create("thread2",
thread_entry, (void *)2,
THREAD_STACK_SIZE,
THREAD_PRIORITY, THREAD_TIMESLICE - 5);
if (tid2 != RT_NULL)
return 0;
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(scheduler_hook, scheduler_hook sample);