1 files changed, 77 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c b/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c
new file mode 100644
index 000000000000..72b07b2d4e1d
--- /dev/null
+++ b/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c
@@ -0,0 +1,77 @@
+/** @file
+  Implementation of synchronization functions on Itanium.
+
+  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "BaseSynchronizationLibInternals.h"
+
+/**
+  Performs an atomic increment of an 32-bit unsigned integer.
+
+  Performs an atomic increment of the 32-bit unsigned integer specified by
+  Value and returns the incremented value. The increment operation must be
+  performed using MP safe mechanisms. The state of the return value is not
+  guaranteed to be MP safe.
+
+  @param  Value A pointer to the 32-bit value to increment.
+
+  @return The incremented value.
+
+**/
+UINT32
+EFIAPI
+InternalSyncIncrement (
+  IN      volatile UINT32           *Value
+  )
+{
+  UINT32                            OriginalValue;
+
+  do {
+    OriginalValue = *Value;
+  } while (OriginalValue != InternalSyncCompareExchange32 (
+                              Value,
+                              OriginalValue,
+                              OriginalValue + 1
+                              ));
+  return OriginalValue + 1;
+}
+
+/**
+  Performs an atomic decrement of an 32-bit unsigned integer.
+
+  Performs an atomic decrement of the 32-bit unsigned integer specified by
+  Value and returns the decrement value. The decrement operation must be
+  performed using MP safe mechanisms. The state of the return value is not
+  guaranteed to be MP safe.
+
+  @param  Value A pointer to the 32-bit value to decrement.
+
+  @return The decrement value.
+
+**/
+UINT32
+EFIAPI
+InternalSyncDecrement (
+  IN      volatile UINT32           *Value
+  )
+{
+  UINT32                            OriginalValue;
+
+  do {
+    OriginalValue = *Value;
+  } while (OriginalValue != InternalSyncCompareExchange32 (
+                              Value,
+                              OriginalValue,
+                              OriginalValue - 1
+                              ));
+  return OriginalValue - 1;
+}