Clean up MdePkg source to correct some coding style issues, etc.

[mirror_edk2.git] / MdePkg / Library / BaseSynchronizationLib / Arm / Synchronization.c

diff --git a/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.c b/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.c
index e046e1b373c55649a3a882b53bb92df9214be2da..56f4d3c481873d3db0c0a27b570bf97a4c325e13 100644 (file)
--- a/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.c
+++ b/MdePkg/Library/BaseSynchronizationLib/Arm/Synchronization.c
@@ -1,7 +1,7 @@
 /** @file\r
   Implementation of synchronization functions. Still needs to be ported\r
 \r
-  Copyright (c) 2006 - 2009, Intel Corporation<BR>\r
+  Copyright (c) 2006 - 2010, Intel Corporation<BR>\r
   Portions copyright (c) 2008-2009 Apple Inc. All rights reserved.<BR> \r
   All rights reserved. This program and the accompanying materials\r
   are licensed and made available under the terms and conditions of the BSD License\r
@@ -13,6 +13,23 @@
 \r
 **/\r
 \r
+/**\r
+  Performs an atomic compare exchange operation on a 32-bit unsigned integer.\r
+\r
+  Performs an atomic compare exchange operation on the 32-bit unsigned integer\r
+  specified by Value.  If Value is equal to CompareValue, then Value is set to\r
+  ExchangeValue and CompareValue is returned.  If Value is not equal to CompareValue,\r
+  then Value is returned.  The compare exchange operation must be performed using\r
+  MP safe mechanisms.\r
+\r
+  @param  Value         A pointer to the 32-bit value for the compare exchange\r
+                        operation.\r
+  @param  CompareValue  32-bit value used in compare operation.\r
+  @param  ExchangeValue 32-bit value used in exchange operation.\r
+\r
+  @return The original *Value before exchange.\r
+\r
+**/\r
 UINT32\r
 EFIAPI\r
 InternalSyncCompareExchange32 (\r