143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* 程序清单：删除线程
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*
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* 这个例子会创建两个线程，在一个线程中删除另外一个线程。
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*/
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#include <rtthread.h>
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#include "tc_comm.h"
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/*
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* 线程删除(rt_thread_delete)函数仅适合于动态线程，为了在一个线程
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* 中访问另一个线程的控制块，所以把线程块指针声明成全局类型以供全
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* 局访问
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*/
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static rt_thread_t tid1 = RT_NULL, tid2 = RT_NULL;
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/* 线程1的入口函数 */
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static void thread1_entry(void* parameter)
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{
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rt_uint32_t count = 0;
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while (1)
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{
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/* 线程1采用低优先级运行，一直打印计数值 */
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// rt_kprintf("thread count: %d\n", count ++);
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count ++;
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}
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}
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static void thread1_cleanup(struct rt_thread *tid)
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{
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if (tid != tid1)
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{
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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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rt_kprintf("thread1 end\n");
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tid1 = RT_NULL;
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}
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/* 线程2的入口函数 */
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static void thread2_entry(void* parameter)
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{
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/* 线程2拥有较高的优先级，以抢占线程1而获得执行 */
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/* 线程2启动后先睡眠10个OS Tick */
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rt_thread_delay(RT_TICK_PER_SECOND);
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/*
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* 线程2唤醒后直接删除线程1，删除线程1后，线程1自动脱离就绪线程
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* 队列
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*/
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rt_thread_delete(tid1);
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/*
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* 线程2继续休眠10个OS Tick然后退出，线程2休眠后应切换到idle线程
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* idle线程将执行真正的线程1控制块和线程栈的删除
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*/
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rt_thread_delay(RT_TICK_PER_SECOND);
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}
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static void thread2_cleanup(struct rt_thread *tid)
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{
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/*
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* 线程2运行结束后也将自动被删除(线程控制块和线程栈在idle线
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* 程中释放)
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*/
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if (tid != tid2)
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{
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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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rt_kprintf("thread2 end\n");
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tid2 = RT_NULL;
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tc_done(TC_STAT_PASSED);
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}
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/* 线程删除示例的初始化 */
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int thread_delete_init()
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{
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/* 创建线程1 */
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tid1 = rt_thread_create("t1", /* 线程1的名称是t1 */
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thread1_entry, RT_NULL, /* 入口是thread1_entry，参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
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if (tid1 != RT_NULL) /* 如果获得线程控制块，启动这个线程 */
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{
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tid1->cleanup = thread1_cleanup;
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rt_thread_startup(tid1);
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}
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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1 */
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tid2 = rt_thread_create("t2", /* 线程1的名称是t2 */
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thread2_entry, RT_NULL, /* 入口是thread2_entry，参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE);
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if (tid2 != RT_NULL) /* 如果获得线程控制块，启动这个线程 */
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{
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tid2->cleanup = thread2_cleanup;
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rt_thread_startup(tid2);
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}
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else
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tc_stat(TC_STAT_END | TC_STAT_FAILED);
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return 10 * RT_TICK_PER_SECOND;
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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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/* lock scheduler */
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rt_enter_critical();
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/* delete thread */
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if (tid1 != RT_NULL)
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{
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rt_kprintf("tid1 is %p, should be NULL\n", tid1);
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tc_stat(TC_STAT_FAILED);
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}
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if (tid2 != RT_NULL)
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{
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rt_kprintf("tid2 is %p, should be NULL\n", tid2);
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tc_stat(TC_STAT_FAILED);
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}
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/* unlock scheduler */
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rt_exit_critical();
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}
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int _tc_thread_delete()
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{
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/* set tc cleanup */
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tc_cleanup(_tc_cleanup);
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return thread_delete_init();
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}
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FINSH_FUNCTION_EXPORT(_tc_thread_delete, a thread delete example);
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#else
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int rt_application_init()
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{
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thread_delete_init();
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return 0;
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}
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#endif
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