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InterlockedOr64 function

Performs an atomic OR operation on the specified LONGLONG values. The function prevents more than one thread from using the same variable simultaneously.

Syntax

LONGLONG __cdecl InterlockedOr64(
  _Inout_ LONGLONG volatile *Destination,
  _In_    LONGLONG          Value
);

Parameters

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

  • Value [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 _InterlockedOr64.

This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.

Itanium-based systems: For performance-critical applications, use InterlockedOr64Acquire or InterlockedOr64Release instead.

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

 

Requirements

Header

WinBase.h (include Windows.h)

See also

Interlocked Variable Access

InterlockedOr

InterlockedOrAcquire

InterlockedOrRelease

InterlockedOrNoFence

InterlockedOr8

InterlockedOr8Acquire

InterlockedOr8Release

InterlockedOr8NoFence

InterlockedOr16

InterlockedOr16Acquire

InterlockedOr16Release

InterlockedOr16NoFence

InterlockedOr64Acquire

InterlockedOr64Release

InterlockedOr64NoFence

Synchronization Functions