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

LONG64 InterlockedOr64(
  LONG64 volatile *Destination,
  LONG64          Value
);

Parameters

Destination

A pointer to the first operand. This value will be replaced with the result of the operation.

Value

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

   
Target Platform Windows
Header winnt.h (include Windows.h)

See Also

Interlocked Variable Access

InterlockedOr

InterlockedOr16

InterlockedOr16Acquire

InterlockedOr16NoFence

InterlockedOr16Release

InterlockedOr64Acquire

InterlockedOr64NoFence

InterlockedOr64Release

InterlockedOr8

InterlockedOr8Acquire

InterlockedOr8NoFence

InterlockedOr8Release

InterlockedOrAcquire

InterlockedOrNoFence

InterlockedOrRelease

Synchronization Functions