From c15a7858c9a7bc1f978faa5f0ea3f618fbd3bc03 Mon Sep 17 00:00:00 2001
From: chenchaoqun <chenchaoqun@rt-thread.com>
Date: Fri, 14 Aug 2020 15:52:35 +0800
Subject: [PATCH] [fix] thread control bug about RT_THREAD_CTRL_CLOSE command

---
 src/thread.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/thread.c b/src/thread.c
index 715596b132..9f80482b20 100644
--- a/src/thread.c
+++ b/src/thread.c
@@ -679,9 +679,17 @@ rt_err_t rt_thread_control(rt_thread_t thread, int cmd, void *arg)
     case RT_THREAD_CTRL_STARTUP:
         return rt_thread_startup(thread);
 
-#ifdef RT_USING_HEAP
     case RT_THREAD_CTRL_CLOSE:
-        return rt_thread_delete(thread);
+
+        if (rt_object_is_systemobject((rt_object_t)thread) == RT_TRUE)
+        {
+            return rt_thread_detach(thread);
+        }
+#ifdef RT_USING_HEAP
+        else
+        {
+            return rt_thread_delete(thread);
+        }
 #endif
 
 #ifdef RT_USING_SMP