mirror of https://github.com/acidanthera/audk.git
34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
#include <Library/DebugLib.h>
|
|
#include "InterlockedCompareExchange16.h"
|
|
|
|
/**
|
|
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 16-bit value used in compare operation.
|
|
@param ExchangeValue 16-bit value used in 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);
|
|
}
|