/* * 程序清单:删除线程 * * 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。 */ #include #include "tc_comm.h" /* * 线程删除(rt_thread_delete)函数仅适合于动态线程,为了在一个线程 * 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 * 局访问 */ static rt_thread_t tid1 = RT_NULL, tid2 = RT_NULL; /* 线程1的入口函数 */ 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 ++); count ++; } } static void thread1_cleanup(struct rt_thread *tid) { if (tid != tid1) { tc_stat(TC_STAT_END | TC_STAT_FAILED); return ; } rt_kprintf("thread1 end\n"); tid1 = RT_NULL; } /* 线程2的入口函数 */ static void thread2_entry(void* parameter) { /* 线程2拥有较高的优先级,以抢占线程1而获得执行 */ /* 线程2启动后先睡眠10个OS Tick */ rt_thread_delay(10); /* * 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 * 队列 */ rt_thread_delete(tid1); /* * 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 * idle线程将执行真正的线程1控制块和线程栈的删除 */ rt_thread_delay(10); } static void thread2_cleanup(struct rt_thread *tid) { /* * 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 * 程中释放) */ if (tid != tid2) { tc_stat(TC_STAT_END | TC_STAT_FAILED); return ; } rt_kprintf("thread2 end\n"); tid2 = RT_NULL; tc_done(TC_STAT_PASSED); } /* 线程删除示例的初始化 */ int thread_delete_init() { /* 创建线程1 */ tid1 = rt_thread_create("t1", /* 线程1的名称是t1 */ thread1_entry, RT_NULL, /* 入口是thread1_entry,参数是RT_NULL */ THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE); if (tid1 != RT_NULL) /* 如果获得线程控制块,启动这个线程 */ { tid1->cleanup = thread1_cleanup; rt_thread_startup(tid1); } else tc_stat(TC_STAT_END | TC_STAT_FAILED); /* 创建线程1 */ tid2 = rt_thread_create("t2", /* 线程1的名称是t2 */ thread2_entry, RT_NULL, /* 入口是thread2_entry,参数是RT_NULL */ THREAD_STACK_SIZE, THREAD_PRIORITY - 1, THREAD_TIMESLICE); if (tid2 != RT_NULL) /* 如果获得线程控制块,启动这个线程 */ { tid2->cleanup = thread2_cleanup; rt_thread_startup(tid2); } else tc_stat(TC_STAT_END | TC_STAT_FAILED); return 0; } #ifdef RT_USING_TC static void _tc_cleanup() { /* lock scheduler */ rt_enter_critical(); /* delete thread */ if (tid1 != RT_NULL) { rt_kprintf("tid1 is bad\n"); tc_stat(TC_STAT_FAILED); } if (tid2 != RT_NULL) { rt_kprintf("tid2 is bad\n"); tc_stat(TC_STAT_FAILED); } /* unlock scheduler */ rt_exit_critical(); } int _tc_thread_delete() { /* set tc cleanup */ tc_cleanup(_tc_cleanup); thread_delete_init(); return 25; } FINSH_FUNCTION_EXPORT(_tc_thread_delete, a thread delete example); #else int rt_application_init() { thread_delete_init(); return 0; } #endif