rt-thread/examples/kernel/thread_yield.c

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2013-01-08 21:05:02 +08:00
/*
*
*/
#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)
{
/* 打印线程1的输出 */
rt_kprintf("thread1: count = %d\n", count ++);
/* 执行yield后应该切换到thread2执行 */
rt_thread_yield();
}
}
/* 线程2入口 */
static void thread2_entry(void* parameter)
{
rt_uint32_t count = 0;
while (1)
{
/* 打印线程2的输出 */
rt_kprintf("thread2: count = %d\n", count ++);
/* 执行yield后应该切换到thread1执行 */
rt_thread_yield();
}
}
int thread_yield_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, 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_yield()
{
/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
thread_yield_init();
/* 返回TestCase运行的最长时间 */
return 30;
}
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_thread_yield, a thread yield example);
#else
/* 用户应用入口 */
int rt_application_init()
{
thread_yield_init();
return 0;
}
#endif