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InterlockedIncrementNoFence function

Increments (increases by one) the value of the specified 32-bit variable as an atomic operation. The operation is performed atomically, but without using memory barriers.

To operate on 16-bit values, use the InterlockedIncrement16NoFence function.

To operate on 64-bit values, use the InterlockedIncrementNoFence64 function.

Syntax


LONG __cdecl InterlockedIncrementNoFence(
  _Inout_  LONG 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 32-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 _InterlockedIncrement_nf.

This function generates no memory barriers (or fences) and does not guarantee that independent memory operations before or after it are completed in order.

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

Requirements

Minimum supported client

Windows 8 [desktop apps only]

Minimum supported server

Windows Server 2012 [desktop apps only]

Header

Winnt.h (include Windows.h)

See also

Interlocked Variable Access
InterlockedIncrement
InterlockedIncrementAcquire
InterlockedIncrementRelease
InterlockedIncrement16
InterlockedIncrement16Acquire
InterlockedIncrement16Release
InterlockedIncrement16NoFence
InterlockedIncrement64
InterlockedIncrementAcquire64
InterlockedIncrementRelease64
InterlockedIncrementNoFence64
InterlockedDecrement
Synchronization Functions

 

 

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