From c253f349d9d1fa75842477fca1f13d613bb958a0 Mon Sep 17 00:00:00 2001 From: "bernard.xiong" Date: Tue, 29 Jun 2010 09:34:12 +0000 Subject: [PATCH] add timer timeout example. git-svn-id: https://rt-thread.googlecode.com/svn/trunk@783 bbd45198-f89e-11dd-88c7-29a3b14d5316 --- examples/kernel/SConscript | 1 + examples/kernel/timer_timeout.c | 122 ++++++++++++++++++++++++++++++++ 2 files changed, 123 insertions(+) create mode 100644 examples/kernel/timer_timeout.c diff --git a/examples/kernel/SConscript b/examples/kernel/SConscript index e0b795443c..7ecb22c991 100644 --- a/examples/kernel/SConscript +++ b/examples/kernel/SConscript @@ -26,6 +26,7 @@ timer_static.c timer_dynamic.c timer_stop_self.c timer_control.c +timer_timeout.c heap_malloc.c heap_realloc.c memp_simple.c diff --git a/examples/kernel/timer_timeout.c b/examples/kernel/timer_timeout.c new file mode 100644 index 0000000000..d82754e557 --- /dev/null +++ b/examples/kernel/timer_timeout.c @@ -0,0 +1,122 @@ +/* + * 程序清单:消息队列例程 + * + * 这个程序会创建3个动态线程,一个线程会从消息队列中收取消息;一个线程会定时给消 + * 息队列发送消息;一个线程会定时给消息队列发送紧急消息。 + */ +#include +#include "tc_comm.h" + +/* 指向线程控制块的指针 */ +static rt_thread_t tid = RT_NULL; + +/* 消息队列控制块 */ +static struct rt_messagequeue mq; +/* 消息队列中用到的放置消息的内存池 */ +static char msg_pool[2048]; + +/* 定时器的控制块 */ +static struct rt_timer timer; +static rt_uint16_t no = 0; +static void timer_timeout(void* parameter) +{ + char buf[32]; + rt_uint32_t length; + + length = rt_snprintf(buf, sizeof(buf), "message %d", no++); + rt_mq_send(&mq, &buf[0], length); +} + +/* 线程入口函数 */ +static void thread_entry(void* parameter) +{ + char buf[64]; + rt_err_t result; + + /* 初始化定时器 */ + rt_timer_init(&timer, "timer", /* 定时器名字是 timer1 */ + timer_timeout, /* 超时时回调的处理函数 */ + RT_NULL, /* 超时函数的入口参数 */ + 1, /* 定时长度,以OS Tick为单位,即1个OS Tick */ + RT_TIMER_FLAG_PERIODIC); /* 周期性定时器 */ + + while (1) + { + rt_memset(&buf[0], 0, sizeof(buf)); + + /* 从消息队列中接收消息 */ + result = rt_mq_recv(&mq, &buf[0], sizeof(buf), 1); + if (result == RT_EOK) + { + rt_kprintf("recv msg: %s\n", buf); + } + else if (result == -RT_ETIMEOUT) + { + rt_kprintf("recv msg timeout\n"); + } + } +} + +int timer_timeout_init() +{ + /* 初始化消息队列 */ + rt_mq_init(&mq, "mqt", + &msg_pool[0], /* 内存池指向msg_pool */ + 128 - sizeof(void*), /* 每个消息的大小是 128 - void* */ + sizeof(msg_pool), /* 内存池的大小是msg_pool的大小 */ + RT_IPC_FLAG_FIFO); /* 如果有多个线程等待,按照先来先得到的方法分配消息 */ + + /* 创建线程 */ + tid = rt_thread_create("t", + 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; +} + +#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); + + /* 执行消息队列对象脱离 */ + rt_mq_detach(&mq); + /* 执行定时器脱离 */ + rt_timer_detach(&timer); + + /* 调度器解锁 */ + rt_exit_critical(); + + /* 设置TestCase状态 */ + tc_done(TC_STAT_PASSED); +} + +int _tc_timer_timeout() +{ + /* 设置TestCase清理回调函数 */ + tc_cleanup(_tc_cleanup); + timer_timeout_init(); + + /* 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_timer_timeout, a thread timer testcase); +#else +/* 用户应用入口 */ +int rt_application_init() +{ + timer_timeout_init(); + + return 0; +} +#endif