InterlockedOr function (wdm.h)

The InterlockedOr routine atomically computes a bitwise OR operation.

Syntax

C++

LONG InterlockedOr(
  [in, out] LONG volatile *Destination,
  [in]      LONG          Value
);

[in, out] Destination

A pointer to the variable to be ORed with Value. The result of the operation is stored in the variable.

[in] Value

Specifies the value to be ORed with the variable that is pointed to by Destination.

InterlockedOr returns the original value stored in the variable pointed to by Destination.

InterlockedOr atomically computes *Destination|=Value.

Interlocked operations cannot be used on non-cached memory.

Requirement	Value
Target Platform	Desktop
Header	wdm.h (include Wdm.h, Ntddk.h, Ntifs.h, Miniport.h)
IRQL	Any level