From 7e4938ca42472510631c10b53502d84f81262d1a Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Mon, 6 Oct 1997 21:28:40 +0000
Subject: Make Post an atomic operation.

---
 c/src/exec/rtems/macros/rtems/rtems/eventset.inl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'c/src/exec/rtems/macros/rtems/rtems')

diff --git a/c/src/exec/rtems/macros/rtems/rtems/eventset.inl b/c/src/exec/rtems/macros/rtems/rtems/eventset.inl
index d5e95e4db6..a924935196 100644
--- a/c/src/exec/rtems/macros/rtems/rtems/eventset.inl
+++ b/c/src/exec/rtems/macros/rtems/rtems/eventset.inl
@@ -31,7 +31,13 @@
  */
 
 #define _Event_sets_Post( _the_new_events, _the_event_set ) \
-   *(_the_event_set) |= (_the_new_events)
+   do { \
+     ISR_Level level; \
+     \
+     _ISR_Disable( level ); \
+       *(_the_event_set) |= (_the_new_events); \
+     _ISR_Enable( level ); \
+   } while (0);
 
 /*PAGE
  *
-- 
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