Code scrub:

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ebc / Synchronization.c

diff --git a/MdePkg/Library/BaseLib/Ebc/Synchronization.c b/MdePkg/Library/BaseLib/Ebc/Synchronization.c
index ef3fa62d898757185de0432eed39c92fa4569bf4..cb5d1f3450bba86b751d596a5dc01e431ff97ebc 100644 (file)
--- a/MdePkg/Library/BaseLib/Ebc/Synchronization.c
+++ b/MdePkg/Library/BaseLib/Ebc/Synchronization.c
@@ -12,6 +12,25 @@
 \r
 **/\r
 \r
+/**\r
+  Performs an atomic compare exchange operation on a 32-bit\r
+  unsigned integer.\r
+\r
+  Performs an atomic compare exchange operation on the 32-bit\r
+  unsigned integer specified by Value.  If Value is equal to\r
+  CompareValue, then Value is set to ExchangeValue and\r
+  CompareValue is returned.  If Value is not equal to\r
+  CompareValue, then Value is returned. The compare exchange\r
+  operation must be performed using MP safe mechanisms.\r
+\r
+  @param  Value         A pointer to the 32-bit value for the\r
+                        compare exchange 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