From 709f38a97287ff1aa8e8c0668c2d066e711db87c Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Wed, 13 Apr 2016 06:48:58 +0200
Subject: score: Use chain iterator for user extensions

Add a lock and use a chain iterator for safe iteration during concurrent
user extension addition and removal.

Ensure that dynamically added thread delete and fatal extensions are
called in reverse order.

Update #2555.
Update #2692.
---
 cpukit/score/src/userextaddset.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

(limited to 'cpukit/score/src/userextaddset.c')

diff --git a/cpukit/score/src/userextaddset.c b/cpukit/score/src/userextaddset.c
index f34ad0072f..19bbd361e9 100644
--- a/cpukit/score/src/userextaddset.c
+++ b/cpukit/score/src/userextaddset.c
@@ -20,20 +20,20 @@
 #endif
 
 #include <rtems/score/userextimpl.h>
-#include <rtems/score/objectimpl.h>
 #include <rtems/score/percpu.h>
-#include <rtems/score/sysstate.h>
 
 void _User_extensions_Add_set(
   User_extensions_Control *the_extension
 )
 {
-  _Assert(
-    _Objects_Allocator_is_owner()
-      || _System_state_Is_before_multitasking( _System_state_Get() )
-  );
+  ISR_lock_Context lock_context;
 
-  _Chain_Append_unprotected( &_User_extensions_List, &the_extension->Node );
+  _User_extensions_Acquire( &lock_context );
+  _Chain_Append_unprotected(
+    &_User_extensions_List.Active,
+    &the_extension->Node
+  );
+  _User_extensions_Release( &lock_context );
 
   /*
    * If a switch handler is present, append it to the switch chain.
-- 
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