From 911d17912560a274f1faef33a09882406ab5190a Mon Sep 17 00:00:00 2001
From: "bernard.xiong" <bernard.xiong@gmail.com>
Date: Sat, 20 Mar 2010 15:15:54 +0000
Subject: add more thread example and Chinese comments.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@519 bbd45198-f89e-11dd-88c7-29a3b14d5316
---
 examples/kernel/thread_yield.c | 101 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 examples/kernel/thread_yield.c

(limited to 'examples/kernel/thread_yield.c')

diff --git a/examples/kernel/thread_yield.c b/examples/kernel/thread_yield.c
new file mode 100644
index 0000000000..e9fb7f57f9
--- /dev/null
+++ b/examples/kernel/thread_yield.c
@@ -0,0 +1,101 @@
+/*
+ * 程序清单：
+ */
+#include <rtthread.h>
+#include "tc_comm.h"
+
+/* 指向线程控制块的指针 */
+static rt_thread_t tid1 = RT_NULL;
+static rt_thread_t tid2 = RT_NULL;
+/* 线程1入口 */
+static void thread1_entry(void* parameter)
+{
+	rt_uint32_t count = 0;
+
+	while (1)
+	{
+		/* 打印线程1的输出 */
+		rt_kprintf("thread1: count = %d\n", count ++);
+
+		/* 执行yield后应该切换到thread2执行 */
+		rt_thread_yield();
+	}
+}
+
+/* 线程2入口 */
+static void thread2_entry(void* parameter)
+{
+	rt_uint32_t count = 0;
+
+	while (1)
+	{
+		/* 打印线程2的输出 */
+		rt_kprintf("thread2: count = %d\n", count ++);
+
+		/* 执行yield后应该切换到thread1执行 */
+		rt_thread_yield();
+	}
+}
+
+int thread_yield_init()
+{
+	/* 创建线程1 */
+	tid1 = rt_thread_create("thread",
+		thread1_entry, RT_NULL, /* 线程入口是thread1_entry, 入口参数是RT_NULL */
+		THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
+	if (tid1 != RT_NULL)
+		rt_thread_startup(tid1);
+	else
+		tc_stat(TC_STAT_END | TC_STAT_FAILED);
+
+	/* 创建线程2 */
+	tid2 = rt_thread_create("thread",
+		thread2_entry, RT_NULL, /* 线程入口是thread2_entry, 入口参数是RT_NULL */
+		THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
+	if (tid2 != RT_NULL)
+		rt_thread_startup(tid2);
+	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 (tid1 != RT_NULL && tid1->stat != RT_THREAD_CLOSE)
+		rt_thread_delete(tid1);
+	if (tid2 != RT_NULL && tid2->stat != RT_THREAD_CLOSE)
+		rt_thread_delete(tid2);
+
+	/* 调度器解锁 */
+	rt_exit_critical();
+
+	/* 设置TestCase状态 */
+	tc_done(TC_STAT_PASSED);
+}
+
+int _tc_thread_yield()
+{
+	/* 设置TestCase清理回调函数 */
+	tc_cleanup(_tc_cleanup);
+	thread_yield_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_thread_yield, a thread yield example);
+#else
+/* 用户应用入口 */
+int rt_application_init()
+{
+	thread_yield_init();
+
+	return 0;
+}
+#endif
-- 
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