rt-thread/examples/kernel/thread_suspend.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
*
*/
/*
* 程序清单:挂起线程
*
* 这个例子中将创建两个动态线程,高优先级线程将在一定时刻后挂起低优先级线程。
*/
#include <rtthread.h>
#include "tc_comm.h"
/* 指向线程控制块的指针 */
static rt_thread_t tid1 = RT_NULL;
static rt_thread_t tid2 = RT_NULL;
/* 线程1入口 */
static void thread1_entry(void* parameter)
{
rt_uint32_t count = 0;
while (1)
{
/* 线程1采用低优先级运行一直打印计数值 */
rt_kprintf("thread count: %d\n", count ++);
}
}
/* 线程2入口 */
static void thread2_entry(void* parameter)
{
/* 延时10个OS Tick */
rt_thread_delay(10);
/* 挂起线程1 */
rt_thread_suspend(tid1);
/* 延时10个OS Tick */
rt_thread_delay(10);
/* 线程2自动退出 */
tid2 = RT_NULL;
}
int thread_suspend_init()
{
/* 创建线程1 */
tid1 = rt_thread_create("thread",
thread1_entry, RT_NULL, /* 线程入口是thread1_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
if (tid1 != RT_NULL)
rt_thread_startup(tid1);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
/* 创建线程2 */
tid2 = rt_thread_create("thread",
thread2_entry, RT_NULL, /* 线程入口是thread2_entry, 入口参数是RT_NULL */
THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE);
if (tid2 != RT_NULL)
rt_thread_startup(tid2);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
return 0;
}
#ifdef RT_USING_TC
static void _tc_cleanup()
{
/* 调度器上锁,上锁后,将不再切换到其他线程,仅响应中断 */
rt_enter_critical();
/* 删除线程 */
if (tid1 != RT_NULL && tid1->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid1);
if (tid2 != RT_NULL && tid2->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid2);
/* 调度器解锁 */
rt_exit_critical();
/* 设置TestCase状态 */
tc_done(TC_STAT_PASSED);
}
int _tc_thread_suspend()
{
/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
thread_suspend_init();
/* 返回TestCase运行的最长时间 */
return 100;
}
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_thread_suspend, a thread suspend example);
#else
/* 用户应用入口 */
int rt_application_init()
{
thread_suspend_init();
return 0;
}
#endif