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InterlockedOr8 function

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

Syntax


char __cdecl InterlockedOr8(
  _Inout_  char volatile *Destination,
  _In_     char 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.

For the Intel Itanium-based systems and x64 architectures, this function is implemented using the compiler intrinsic. For the x86 architecture, use the _InterlockedOr8 compiler intrinsic directly.

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 InterlockedOr8Acquire or InterlockedOr8Release instead.

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

Note  

Requirements

Header

WinBase.h (include Windows.h)

See also

Interlocked Variable Access
InterlockedOr
InterlockedOrAcquire
InterlockedOrRelease
InterlockedOrNoFence
InterlockedOr8Acquire
InterlockedOr8Release
InterlockedOr8NoFence
InterlockedOr16
InterlockedOr16Acquire
InterlockedOr16Release
InterlockedOr16NoFence
InterlockedOr64
InterlockedOr64Acquire
InterlockedOr64Release
InterlockedOr64NoFence
Synchronization Functions

 

 

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