InterlockedExchangeAcquire64 function
Sets a 64-bit variable to the specified value as an atomic operation. The operation is performed using acquire memory ordering semantics.
Syntax
LONGLONG __cdecl InterlockedExchangeAcquire64(
_Inout_ LONGLONG volatile Target,
_In_ LONGLONG Value
);
Parameters
- Target [in, out]
-
A pointer to the value to exchange. The function sets the value of this parameter to the value of the Value parameter, and returns the prior value of this parameter.
- Value [in]
-
The value to be compared to the value of the Target parameter.
Return value
The function returns the initial value of the Target parameter.
Remarks
The interlocked functions provide a simple mechanism for synchronizing access to a variable that is shared by multiple threads. This function is atomic with respect to calls to other interlocked functions.
This function is implemented using a compiler intrinsic where possible. For more information, see the WinBase.h header file and _InterlockedExchange64_acq.
This function is supported only on Itanium-based systems.
Requirements
|
Minimum supported client |
Windows Vista [desktop apps | Windows Store apps] |
|---|---|
|
Minimum supported server |
Windows Server 2003 [desktop apps | Windows Store apps] |
|
Header |
|
See also
- Interlocked Variable Access
- InterlockedCompareExchange
- InterlockedExchange
- InterlockedExchangeAcquire
- InterlockedExchangeNoFence
- InterlockedExchange8
- InterlockedExchange16
- InterlockedExchange16Acquire
- InterlockedExchange16NoFence
- InterlockedExchange64
- InterlockedExchangeNoFence64
- InterlockedExchangePointer
- InterlockedExchangePointerAcquire
- InterlockedExchangePointerNoFence
- InterlockedExchangeAdd
- InterlockedExchangeSubtract
- Synchronization Functions