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authorGuo Mang <mang.guo@intel.com>2016-12-22 15:57:14 +0800
committerGuo Mang <mang.guo@intel.com>2016-12-26 19:14:41 +0800
commit1760cf81e4b1847c6823ea3514a78dd120e19b6e (patch)
tree64a874b14050fe24d3bbc1bc13cd293abf8ae018 /Core/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c
parent7f05fa00f73038b425002566d3afe6c3ade2ccdb (diff)
downloadedk2-platforms-1760cf81e4b1847c6823ea3514a78dd120e19b6e.tar.xz
MdePkg: Move to new location
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Guo Mang <mang.guo@intel.com>
Diffstat (limited to 'Core/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c')
-rw-r--r--Core/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c b/Core/MdePkg/Library/BaseSynchronizationLib/Ipf/Synchronization.c
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index 0000000000..3e316e7140
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+++ b/Core/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;
+}