添加单独注码命令,实现检测时注码

source/soft/mystdlib.c

@@ -351,6 +351,7 @@ void *tappend(void *p,void *del)
 {
   temp_def *t=&g_tempptr;
   void *ret=NULL;
+  if(p==NULL) return p;
   rt_mutex_take(t->mutex,RT_WAITING_FOREVER);
   {
     if(tempptr_find(t,p)==0)