Synchronization.c File Reference

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Functions
UINT16 EFIAPI	InternalSyncCompareExchange16 (IN volatile UINT16 *Value, IN UINT16 CompareValue, IN UINT16 ExchangeValue)
UINT32 EFIAPI	InternalSyncCompareExchange32 (IN volatile UINT32 *Value, IN UINT32 CompareValue, IN UINT32 ExchangeValue)
UINT64 EFIAPI	InternalSyncCompareExchange64 (IN volatile UINT64 *Value, IN UINT64 CompareValue, IN UINT64 ExchangeValue)
UINT32 EFIAPI	InternalSyncIncrement (IN volatile UINT32 *Value)
UINT32 EFIAPI	InternalSyncDecrement (IN volatile UINT32 *Value)

Detailed Description

Implementation of synchronization functions on EBC.

Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Synchronization.c.

Function Documentation

InternalSyncCompareExchange16()

UINT16 EFIAPI InternalSyncCompareExchange16	(	IN volatile UINT16 *	Value,
		IN UINT16	CompareValue,
		IN UINT16	ExchangeValue
	)

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.

Parameters

Value	A pointer to the 16-bit value for the compare exchange operation.
CompareValue	16-bit value used in compare operation.
ExchangeValue	16-bit value used in exchange operation.

Returns

The original *Value before exchange.

Definition at line 30 of file Synchronization.c.

InternalSyncCompareExchange32()

UINT32 EFIAPI InternalSyncCompareExchange32	(	IN volatile UINT32 *	Value,
		IN UINT32	CompareValue,
		IN UINT32	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 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.

Parameters

Value	A pointer to the 32-bit value for the compare exchange operation.
CompareValue	32-bit value used in compare operation.
ExchangeValue	32-bit value used in exchange operation.

Returns

The original *Value before exchange.

Definition at line 61 of file Synchronization.c.

InternalSyncCompareExchange64()

UINT64 EFIAPI InternalSyncCompareExchange64	(	IN volatile UINT64 *	Value,
		IN UINT64	CompareValue,
		IN UINT64	ExchangeValue
	)

Performs an atomic compare exchange operation on a 64-bit unsigned integer.

Performs an atomic compare exchange operation on the 64-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.

Parameters

Value	A pointer to the 64-bit value for the compare exchange operation.
CompareValue	64-bit value used in compare operation.
ExchangeValue	64-bit value used in exchange operation.

Returns

The original *Value before exchange.

Definition at line 89 of file Synchronization.c.

InternalSyncDecrement()

UINT32 EFIAPI InternalSyncDecrement

(

IN volatile UINT32 *

Value

)

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.

Parameters

Value

A pointer to the 32-bit value to decrement.

Returns

The decrement value.

Definition at line 136 of file Synchronization.c.

InternalSyncIncrement()

UINT32 EFIAPI InternalSyncIncrement

(

IN volatile UINT32 *

Value

)

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.

Parameters

Value

A pointer to the 32-bit value to increment.

Returns

The incremented value.

Definition at line 114 of file Synchronization.c.