| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | #include <Library/DebugLib.h>
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| 2 | #include "InterlockedCompareExchange16.h"
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| 3 |
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| 4 | /**
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| 5 | Performs an atomic compare exchange operation on a 16-bit unsigned integer.
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| 6 |
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| 7 | Performs an atomic compare exchange operation on the 16-bit unsigned integer
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| 8 | specified by Value. If Value is equal to CompareValue, then Value is set to
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| 9 | ExchangeValue and CompareValue is returned. If Value is not equal to CompareValue,
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| 10 | then Value is returned. The compare exchange operation must be performed using
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| 11 | MP safe mechanisms.
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| 12 |
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| 13 | If Value is NULL, then ASSERT().
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| 14 |
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| 15 | @param Value A pointer to the 16-bit value for the compare exchange
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| 16 | operation.
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| 17 | @param CompareValue 16-bit value used in compare operation.
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| 18 | @param ExchangeValue 16-bit value used in exchange operation.
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| 19 |
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| 20 | @return The original *Value before exchange.
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| 21 |
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| 22 | **/
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| 23 | UINT16
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| 24 | EFIAPI
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| 25 | InterlockedCompareExchange16 (
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| 26 | IN OUT UINT16 *Value,
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| 27 | IN UINT16 CompareValue,
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| 28 | IN UINT16 ExchangeValue
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| 29 | )
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| 30 | {
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| 31 | ASSERT (Value != NULL);
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| 32 | return InternalSyncCompareExchange16 (Value, CompareValue, ExchangeValue);
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| 33 | }
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