diff --git a/components/cplusplus/Thread.cpp b/components/cplusplus/Thread.cpp
index 9b2a2ad5e0..b21fbdce1f 100644
--- a/components/cplusplus/Thread.cpp
+++ b/components/cplusplus/Thread.cpp
@@ -80,23 +80,23 @@ void Thread::func(Thread *pThis)
     }
     else
     {
-        pThis->run();
+        pThis->run(pThis->_param);
     }
 
     rt_event_send(&pThis->_event, 1);
 }
 
-void Thread::run()
+void Thread::run(void *parameter)
 {
     /* please overload this method */
 }
 
-void Thread::wait(int32_t millisec)
+rt_err_t Thread::wait(int32_t millisec)
 {
-    join(millisec);
+    return join(millisec);
 }
 
-void Thread::join(int32_t millisec)
+rt_err_t Thread::join(int32_t millisec)
 {
     if (started)
     {
@@ -107,6 +107,10 @@ void Thread::join(int32_t millisec)
         else
             tick = rt_tick_from_millisecond(millisec);
 
-        rt_event_recv(&_event, 1, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, tick, RT_NULL);
+        return rt_event_recv(&_event, 1, RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR, tick, RT_NULL);
+    }
+    else
+    {
+        return -RT_ENOSYS;
     }
 }
diff --git a/components/cplusplus/Thread.h b/components/cplusplus/Thread.h
index 71ee50e1f9..b578659489 100644
--- a/components/cplusplus/Thread.h
+++ b/components/cplusplus/Thread.h
@@ -45,16 +45,15 @@ public:
 
     static void sleep(int32_t millisec);
 
-    void wait(int32_t millisec);
-    void join(int32_t millisec = -1);
+    rt_err_t wait(int32_t millisec);
+    rt_err_t join(int32_t millisec = -1);
 
 protected:
-    virtual void run();
+    virtual void run(void *parameter);
 
 private:
     static void func(Thread *pThis);
 
-private:
     rt_thread_t _thread;
 
     thread_func_t _entry;
diff --git a/src/components.c b/src/components.c
index 3b9f131eaf..b9fc4c178c 100644
--- a/src/components.c
+++ b/src/components.c
@@ -153,7 +153,6 @@ int __low_level_init(void)
     return 0;
 }
 #elif defined(__GNUC__)
-extern int main(void);
 /* Add -eentry to arm-none-eabi-gcc argument */
 int entry(void)
 {
@@ -204,7 +203,7 @@ void rt_application_init(void)
     result = rt_thread_init(tid, "main", main_thread_entry, RT_NULL,
                             main_stack, sizeof(main_stack), RT_MAIN_THREAD_PRIORITY, 20);
     RT_ASSERT(result == RT_EOK);
-	
+
     /* if not define RT_USING_HEAP, using to eliminate the warning */
     (void)result;
 #endif