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InterlockedOrNoFence function

Performs an atomic OR operation on the specified LONG values. The operation is performed atomically, but without using memory barriers.The function prevents more than one thread from using the same variable simultaneously.

Syntax

LONG __cdecl InterlockedOrNoFence(
  _Inout_ LONG volatile *Value,
  _In_    LONG          Mask
);

Parameters

  • Value [in, out]
    A pointer to the first operand. This value will be replaced with the result of the operation.

  • Mask [in]
    The second operand.

Return value

The function returns the original value of the Destination 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 _InterlockedOr_rel.

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

InterlockedOr

InterlockedOrAcquire

InterlockedOrRelease

InterlockedOr8

InterlockedOr8Acquire

InterlockedOr8Release

InterlockedOr8NoFence

InterlockedOr16

InterlockedOr16Acquire

InterlockedOr16Release

InterlockedOr16NoFence

InterlockedOr64

InterlockedOr64Acquire

InterlockedOr64Release

InterlockedOr64NoFence

Synchronization Functions