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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.

Note  Windows 8 does not support Itanium-based systems.

Note  This function is supported on Windows RT-based systems.

Note  

Requirements

Minimum supported client

Windows Vista [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2003 [desktop apps | Windows Store apps]

Header

WinBase.h (include Windows.h)

See also

Interlocked Variable Access
InterlockedCompareExchange
InterlockedExchange
InterlockedExchangeAcquire
InterlockedExchangeNoFence
InterlockedExchange8
InterlockedExchange16
InterlockedExchange16Acquire
InterlockedExchange16NoFence
InterlockedExchange64
InterlockedExchangeNoFence64
InterlockedExchangePointer
InterlockedExchangePointerAcquire
InterlockedExchangePointerNoFence
InterlockedExchangeAdd
InterlockedExchangeSubtract
Synchronization Functions

 

 

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