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Diffstat (limited to 'Core/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.c')
-rw-r--r-- | Core/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.c b/Core/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.c new file mode 100644 index 0000000000..ef407af9a9 --- /dev/null +++ b/Core/MdePkg/Library/BaseSynchronizationLib/X64/InterlockedCompareExchange32.c @@ -0,0 +1,54 @@ +/** @file
+ InterlockedCompareExchange32 function
+
+ Copyright (c) 2006 - 2016, 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.
+
+**/
+
+/**
+ Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
+**/
+
+long _InterlockedCompareExchange(
+ long volatile * Destination,
+ long Exchange,
+ long Comperand
+);
+
+#pragma intrinsic(_InterlockedCompareExchange)
+
+/**
+ Performs an atomic compare exchange operation on a 32-bit unsigned integer.
+
+ Performs an atomic compare exchange operation on the 32-bit unsigned integer
+ specified by Value. If Value is equal to CompareValue, then Value is set to
+ ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue,
+ then Value is returned. The compare exchange operation must be performed using
+ MP safe mechanisms.
+
+ @param Value A pointer to the 32-bit value for the compare exchange
+ operation.
+ @param CompareValue 32-bit value used in compare operation.
+ @param ExchangeValue 32-bit value used in exchange operation.
+
+ @return The original *Value before exchange.
+
+**/
+UINT32
+EFIAPI
+InternalSyncCompareExchange32 (
+ IN volatile UINT32 *Value,
+ IN UINT32 CompareValue,
+ IN UINT32 ExchangeValue
+ )
+{
+ return _InterlockedCompareExchange (Value, ExchangeValue, CompareValue);
+}
+
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