Expand Minimize

InterlockedIncrementAcquire64 function

Increments (increases by one) the value of the specified 64-bit variable as an atomic operation. The operation is performed using acquire memory ordering semantics.

Syntax


LONGLONG __cdecl InterlockedIncrementAcquire64(
  _Inout_  LONGLONG volatile *Addend
);

Parameters

Addend [in, out]

A pointer to the variable to be incremented.

Return value

The function returns the resulting incremented value.

Remarks

The variable pointed to by the Addend parameter must be aligned on a 64-bit boundary; otherwise, this function will behave unpredictably on multiprocessor x86 systems and any non-x86 systems. See _aligned_malloc.

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 _InterlockedIncrement64_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

Header

Winnt.h (include Windows.h)

See also

Interlocked Variable Access
InterlockedIncrement
InterlockedIncrementAcquire
InterlockedIncrementRelease
InterlockedIncrementNoFence
InterlockedIncrement16
InterlockedIncrement16Acquire
InterlockedIncrement16Release
InterlockedIncrement16NoFence
InterlockedIncrement64
InterlockedIncrementRelease64
InterlockedIncrementNoFence64
InterlockedDecrement
Synchronization Functions

 

 

Community Additions

ADD
Show:
© 2014 Microsoft. All rights reserved.