diff options
Diffstat (limited to 'MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c')
-rw-r--r-- | MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c index 9b20236acf..ca21f5dcce 100644 --- a/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c +++ b/MdePkg/Library/BaseSynchronizationLib/SynchronizationMsc.c @@ -295,6 +295,37 @@ InterlockedDecrement ( }
/**
+ Performs an atomic compare exchange operation on a 16-bit unsigned integer.
+
+ Performs an atomic compare exchange operation on the 16-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.
+
+ If Value is NULL, then ASSERT().
+
+ @param Value A pointer to the 16-bit value for the compare exchange
+ operation.
+ @param CompareValue A 16-bit value used in a compare operation.
+ @param ExchangeValue A 16-bit value used in an exchange operation.
+
+ @return The original *Value before exchange.
+
+**/
+UINT16
+EFIAPI
+InterlockedCompareExchange16 (
+ IN OUT UINT16 *Value,
+ IN UINT16 CompareValue,
+ IN UINT16 ExchangeValue
+ )
+{
+ ASSERT (Value != NULL);
+ return InternalSyncCompareExchange16 (Value, CompareValue, ExchangeValue);
+}
+
+/**
Performs an atomic compare exchange operation on a 32-bit unsigned integer.
Performs an atomic compare exchange operation on the 32-bit unsigned integer
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