InterlockedExchangeAdd routine
The InterlockedExchangeAdd routine adds a value to a given integer as an atomic operation and returns the original value of the given integer.
Syntax
LONG InterlockedExchangeAdd(
_Inout_ LONG volatile *Addend,
_In_ LONG Value
);
Parameters
- Addend [in, out]
-
A pointer to an integer variable.
- Value [in]
-
Specifies the value to be added to Addend.
Return value
InterlockedExchangeAdd returns the original value of the Addend variable when the call occurred.
Remarks
InterlockedExchangeAdd should be used instead of ExInterlockedAddUlong because it is both faster and more efficient.
InterlockedExchangeAdd is implemented inline by the compiler when appropriate and possible. It does not require a spin lock and can therefore be safely used on pageable data.
InterlockedExchangeAdd is atomic only with respect to other InterlockedXxx calls.
Interlocked operations cannot be used on non-cached memory.
Requirements
|
Version | Available starting with Windows 2000. |
|---|---|
|
Header |
|
|
IRQL | Any level |
See also
Send comments about this topic to Microsoft
Build date: 5/22/2013
