diff options
Diffstat (limited to 'examples/kernel/semaphore_dynamic.c')
| -rw-r--r-- | examples/kernel/semaphore_dynamic.c | 162 |
1 files changed, 83 insertions, 79 deletions
diff --git a/examples/kernel/semaphore_dynamic.c b/examples/kernel/semaphore_dynamic.c index 579d9daa9a..dc088e6e44 100644 --- a/examples/kernel/semaphore_dynamic.c +++ b/examples/kernel/semaphore_dynamic.c @@ -15,108 +15,112 @@ 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; + rt_err_t result; + rt_tick_t tick; - /* 获得当前的OS Tick */ - tick = rt_tick_get(); + /* 获得当前的OS Tick */ + tick = rt_tick_get(); - /* 试图持有一个信号量，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\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; - } + /* 试图持有一个信号量，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) + { + rt_tick_t new_tick = rt_tick_get(); + /* 可以有两个 tick 的误差 */ + if (new_tick - tick >= 12) + { + rt_kprintf("tick error to large: expect: 10, get %d\n", + new_tick - tick); - /* 释放一次信号量 */ - rt_sem_release(sem); + /* 如果失败，则测试失败 */ + tc_done(TC_STAT_FAILED); + rt_sem_delete(sem); + return; + } + 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; + } - /* 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; - } + /* 释放一次信号量 */ + rt_sem_release(sem); - /* 测试成功 */ - tc_done(TC_STAT_PASSED); - /* 删除信号量 */ - rt_sem_delete(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; + } + + /* 测试成功 */ + tc_done(TC_STAT_PASSED); + /* 删除信号量 */ + rt_sem_delete(sem); } int semaphore_dynamic_init() { - /* 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) - { - tc_stat(TC_STAT_END | TC_STAT_FAILED); - return 0; - } + /* 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) + { + tc_stat(TC_STAT_END | TC_STAT_FAILED); + return 0; + } - /* 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); - else - tc_stat(TC_STAT_END | TC_STAT_FAILED); + /* 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); + else + tc_stat(TC_STAT_END | TC_STAT_FAILED); - return 0; + 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(); + /* 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(); - if (sem) - { - rt_sem_delete(sem); - sem = RT_NULL; - } + if (sem) + { + rt_sem_delete(sem); + sem = RT_NULL; + } - /* 删除线程 */ - if (tid != RT_NULL && tid->stat != RT_THREAD_CLOSE) - { - rt_thread_delete(tid); - } + /* 删除线程 */ + if (tid != RT_NULL && tid->stat != RT_THREAD_CLOSE) + { + rt_thread_delete(tid); + } - /* 调度器解锁 */ - rt_exit_critical(); + /* 调度器解锁 */ + rt_exit_critical(); - /* 设置TestCase状态 */ - tc_done(TC_STAT_PASSED); + /* 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(); + /* 设置TestCase清理回调函数 */ + tc_cleanup(_tc_cleanup); + semaphore_dynamic_init(); - /* 返回TestCase运行的最长时间 */ - return 100; + /* 返回TestCase运行的最长时间 */ + return 100; } /* 输出函数命令到finsh shell中 */ FINSH_FUNCTION_EXPORT(_tc_semaphore_dynamic, a dynamic semaphore example); @@ -124,8 +128,8 @@ FINSH_FUNCTION_EXPORT(_tc_semaphore_dynamic, a dynamic semaphore example); /* 用户应用入口 */ int rt_application_init() { - semaphore_dynamic_init(); + semaphore_dynamic_init(); - return 0; + return 0; } #endif |