Windows apps
Collapse the table of content
Expand the table of content
Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

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

 

 

Show:
© 2016 Microsoft