164 lines
4.0 KiB
C
164 lines
4.0 KiB
C
/*
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* 程序清单：
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*/
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#include <rtthread.h>
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#include "tc_comm.h"
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/* 指向线程控制块的指针 */
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static rt_thread_t tid1 = RT_NULL;
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static rt_thread_t tid2 = RT_NULL;
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static rt_thread_t tid3 = RT_NULL;
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static rt_mutex_t mutex = RT_NULL;
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/* 线程1入口 */
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static void thread1_entry(void* parameter)
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{
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/* 先让低优先级线程运行 */
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rt_thread_delay(10);
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/* 此时thread3持有mutex，并且thread2等待持有mutex */
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/* 检查thread2与thread3的优先级情况 */
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if (tid2->current_priority != tid3->current_priority)
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{
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/* 优先级不相同，测试失败 */
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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return;
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}
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}
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/* 线程2入口 */
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static void thread2_entry(void* parameter)
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{
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rt_err_t result;
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/* 先让低优先级线程运行 */
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rt_thread_delay(5);
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while (1)
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{
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/*
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* 试图持有互斥锁，此时thread3持有，应把thread3的优先级提升到thread2相同
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* 的优先级
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*/
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result = rt_mutex_take(mutex, RT_WAITING_FOREVER);
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if (result == RT_EOK)
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{
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/* 释放互斥锁 */
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rt_mutex_release(mutex);
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}
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}
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}
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/* 线程3入口 */
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static void thread3_entry(void* parameter)
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{
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rt_tick_t tick;
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rt_err_t result;
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while (1)
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{
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result = rt_mutex_take(mutex, RT_WAITING_FOREVER);
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result = rt_mutex_take(mutex, RT_WAITING_FOREVER);
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if (result != RT_EOK)
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{
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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}
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/* 做一个长时间的循环，总共50个OS Tick */
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tick = rt_tick_get();
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while (rt_tick_get() - tick < 50) ;
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rt_mutex_release(mutex);
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rt_mutex_release(mutex);
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}
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}
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int mutex_simple_init()
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{
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/* 创建互斥锁 */
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mutex = rt_mutex_create("mutex", RT_IPC_FLAG_FIFO);
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if (mutex == RT_NULL)
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{
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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return 0;
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}
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/* 创建线程1 */
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tid1 = rt_thread_create("t1",
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thread1_entry, RT_NULL, /* 线程入口是thread1_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE);
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if (tid1 != RT_NULL)
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rt_thread_startup(tid1);
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else
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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/* 创建线程2 */
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tid2 = rt_thread_create("t2",
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thread2_entry, RT_NULL, /* 线程入口是thread2_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
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if (tid2 != RT_NULL)
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rt_thread_startup(tid2);
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else
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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/* 创建线程3 */
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tid3 = rt_thread_create("t3",
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thread3_entry, RT_NULL, /* 线程入口是thread3_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY + 1, THREAD_TIMESLICE);
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if (tid3 != RT_NULL)
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rt_thread_startup(tid3);
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else
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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return 0;
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}
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#ifdef RT_USING_TC
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static void _tc_cleanup()
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{
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/* 调度器上锁，上锁后，将不再切换到其他线程，仅响应中断 */
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rt_enter_critical();
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/* 删除线程 */
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if (tid1 != RT_NULL && tid1->stat != RT_THREAD_CLOSE)
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rt_thread_delete(tid1);
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if (tid2 != RT_NULL && tid2->stat != RT_THREAD_CLOSE)
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rt_thread_delete(tid2);
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if (tid3 != RT_NULL && tid3->stat != RT_THREAD_CLOSE)
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rt_thread_delete(tid3);
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if (mutex != RT_NULL)
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{
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rt_mutex_delete(mutex);
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}
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/* 调度器解锁 */
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rt_exit_critical();
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/* 设置TestCase状态 */
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tc_done(TC_STAT_PASSED);
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}
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int _tc_mutex_simple()
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{
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/* 设置TestCase清理回调函数 */
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tc_cleanup(_tc_cleanup);
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mutex_simple_init();
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/* 返回TestCase运行的最长时间 */
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return 100;
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}
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/* 输出函数命令到finsh shell中 */
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FINSH_FUNCTION_EXPORT(_tc_mutex_simple, sime mutex example);
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#else
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/* 用户应用入口 */
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int rt_application_init()
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{
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mutex_simple_init();
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return 0;
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}
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#endif
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