diff --git a/examples/kernel/semaphore_dynamic.c b/examples/kernel/semaphore_dynamic.c index be49459a4d..6bce4b91a2 100644 --- a/examples/kernel/semaphore_dynamic.c +++ b/examples/kernel/semaphore_dynamic.c @@ -1,55 +1,70 @@ +/* + * 程序清单:动态信号量 + * + * 这个例子中将创建一个动态信号量(初始值为0 )及一个动态线程,在这个动态线程中 + * 将试图采用超时方式去持有信号量,应该超时返回。然后这个线程释放一次信号量,并 + * 在后面继续采用永久等待方式去持有信号量, 成功获得信号量后返回。 + */ #include #include "tc_comm.h" -static rt_sem_t sem; +/* 指向线程控制块的指针 */ +static rt_thread_t tid = RT_NULL; +/* 指向信号量的指针 */ +static rt_sem_t sem = RT_NULL; +/* 线程入口 */ static void thread_entry(void* parameter) { rt_err_t result; rt_tick_t tick; - /* get current tick */ + /* 获得当前的OS Tick */ tick = rt_tick_get(); - /* take a semaphore for 10 OS Tick */ + /* 视图持有一个信号量,如果10个OS Tick依然没拿到,则超时返回 */ result = rt_sem_take(sem, 10); if (result == -RT_ETIMEOUT) { + /* 判断是否刚好过去10个OS Tick */ if (rt_tick_get() - tick != 10) { + /* 如果失败,则测试失败 */ tc_done(TC_STAT_FAILED); rt_sem_delete(sem); return; } - rt_kprintf("take semaphore timeout"); + rt_kprintf("take semaphore timeout\n"); } else { + /* 因为并没释放信号量,应该是超时返回,否则测试失败 */ tc_done(TC_STAT_FAILED); rt_sem_delete(sem); return; } - /* release semaphore one time */ + /* 释放一次信号量 */ rt_sem_release(sem); + /* 继续持有信号量,并永远等待直到持有到信号量 */ result = rt_sem_take(sem, RT_WAITING_FOREVER); if (result != RT_EOK) { + /* 返回不正确,测试失败 */ tc_done(TC_STAT_FAILED); rt_sem_delete(sem); return; } - /* testcase passed */ + /* 测试成功 */ tc_done(TC_STAT_PASSED); - /* delete semaphore */ + /* 删除信号量 */ rt_sem_delete(sem); } int semaphore_dynamic_init() { - rt_thread_t tid; - + /* 创建一个信号量,初始值是0 */ sem = rt_sem_create("sem", 0, RT_IPC_FLAG_FIFO); if (sem == RT_NULL) { @@ -57,8 +72,9 @@ int semaphore_dynamic_init() return 0; } - tid = rt_thread_create("test", - thread_entry, RT_NULL, + /* 创建线程 */ + tid = rt_thread_create("thread", + thread_entry, RT_NULL, /* 线程入口是thread_entry, 入口参数是RT_NULL */ THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE); if (tid != RT_NULL) rt_thread_startup(tid); @@ -69,14 +85,40 @@ int semaphore_dynamic_init() } #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 (tid != RT_NULL && tid->stat != RT_THREAD_CLOSE) + { + rt_thread_delete(tid); + + /* 删除信号量 */ + rt_sem_delete(sem); + } + + /* 调度器解锁 */ + rt_exit_critical(); + + /* 设置TestCase状态 */ + tc_done(TC_STAT_PASSED); +} + int _tc_semaphore_dynamic() { + /* 设置TestCase清理回调函数 */ + tc_cleanup(_tc_cleanup); semaphore_dynamic_init(); - return 30; + /* 返回TestCase运行的最长时间 */ + return 100; } -FINSH_FUNCTION_EXPORT(_tc_semaphore_dynamic, a dynamic semaphore test); +/* 输出函数命令到finsh shell中 */ +FINSH_FUNCTION_EXPORT(_tc_semaphore_dynamic, a dynamic semaphore example); #else +/* 用户应用入口 */ int rt_application_init() { semaphore_dynamic_init(); diff --git a/examples/kernel/semaphore_static.c b/examples/kernel/semaphore_static.c index 3b5cda3038..717ff25c57 100644 --- a/examples/kernel/semaphore_static.c +++ b/examples/kernel/semaphore_static.c @@ -1,50 +1,65 @@ +/* + * 程序清单:静态信号量 + * + * 这个例子中将创建一个静态信号量(初始值为0 )及一个静态线程,在这个静态线程中 + * 将试图采用超时方式去持有信号量,应该超时返回。然后这个线程释放一次信号量,并 + * 在后面继续采用永久等待方式去持有信号量, 成功获得信号量后返回。 + */ #include #include "tc_comm.h" +/* 线程控制块及栈 */ +static struct rt_thread thread; +static rt_uint8_t thread_stack[THREAD_STACK_SIZE]; +/* 信号量控制块 */ static struct rt_semaphore sem; -struct rt_thread thread; -static char thread_stack[THREAD_STACK_SIZE]; + +/* 线程入口 */ static void thread_entry(void* parameter) { rt_err_t result; rt_tick_t tick; - /* get current tick */ + /* 获得当前的OS Tick */ tick = rt_tick_get(); - /* take a semaphore for 10 OS Tick */ + /* 试图持有信号量,最大等待10个OS Tick后返回 */ result = rt_sem_take(&sem, 10); if (result == -RT_ETIMEOUT) { + /* 超时后判断是否刚好是10个OS Tick */ if (rt_tick_get() - tick != 10) { tc_done(TC_STAT_FAILED); rt_sem_detach(&sem); return; } - rt_kprintf("take semaphore timeout"); + rt_kprintf("take semaphore timeout\n"); } else { + /* 因为没有其他地方是否信号量,所以不应该成功持有信号量,否则测试失败 */ tc_done(TC_STAT_FAILED); rt_sem_detach(&sem); return; } - /* release semaphore one time */ + /* 释放一次信号量 */ rt_sem_release(&sem); + /* 永久等待方式持有信号量 */ result = rt_sem_take(&sem, RT_WAITING_FOREVER); if (result != RT_EOK) { + /* 不成功则测试失败 */ tc_done(TC_STAT_FAILED); rt_sem_detach(&sem); return; } - /* testcase passed */ + /* 测试通过 */ tc_done(TC_STAT_PASSED); - /* detach semaphore */ + /* 脱离信号量对象 */ rt_sem_detach(&sem); } @@ -52,6 +67,7 @@ int semaphore_static_init() { rt_err_t result; + /* 初始化信号量,初始值是0 */ result = rt_sem_init(&sem, "sem", 0, RT_IPC_FLAG_FIFO); if (result != RT_EOK) { @@ -59,10 +75,12 @@ int semaphore_static_init() return 0; } - result = rt_thread_init(&thread, "test", - thread_entry, RT_NULL, - thread_stack, THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE); - if (result == RT_EOK) + /* 初始化线程1 */ + result = rt_thread_init(&thread, "thread", /* 线程名:thread */ + thread_entry, RT_NULL, /* 线程的入口是thread_entry,入口参数是RT_NULL*/ + &thread_stack[0], sizeof(thread_stack), /* 线程栈是thread_stack */ + THREAD_PRIORITY, 10); + if (result == RT_EOK) /* 如果返回正确,启动线程1 */ rt_thread_startup(&thread); else tc_stat(TC_STAT_END | TC_STAT_FAILED); @@ -73,29 +91,41 @@ int semaphore_static_init() #ifdef RT_USING_TC static void _tc_cleanup() { - /* lock scheduler */ + /* 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(); + /* 执行线程脱离 */ if (thread.stat != RT_THREAD_CLOSE) + { rt_thread_detach(&thread); - /* unlock scheduler */ + /* 执行信号量对象脱离 */ + rt_sem_detach(&sem); + } + + /* 调度器解锁 */ rt_exit_critical(); + + /* 设置TestCase状态 */ + tc_done(TC_STAT_PASSED); } int _tc_semaphore_static() { - /* set tc cleanup */ + /* 设置TestCase清理回调函数 */ tc_cleanup(_tc_cleanup); semaphore_static_init(); - return 30; + /* 返回TestCase运行的最长时间 */ + return 100; } -FINSH_FUNCTION_EXPORT(_tc_semaphore_static, a static semaphore test); +/* 输出函数命令到finsh shell中 */ +FINSH_FUNCTION_EXPORT(_tc_semaphore_static, a static semaphore example); #else +/* 用户应用入口 */ int rt_application_init() { - semaphore_static_init(); + thread_static_init(); return 0; }