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InterlockedBitTestAndComplement function

Tests the specified bit of the specified LONG value and complements it. The operation is atomic.

Syntax


FORCEINLINE BOOLEAN FORCEINLINE InterlockedBitTestAndComplement(
  _Inout_ LONG volatile *Base,
  _In_    LONG          Bit
);

Parameters

Base [in, out]

A pointer to a variable.

Bit [in]

The bit position to be tested.

Return value

The value of the specified bit.

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

Requirements

Minimum supported client

Windows Vista [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2003 [desktop apps | Windows Store apps]

Header

Winnt.h (include Windows.h)

See also

Interlocked Variable Access
InterlockedBitTestAndComplement64
Synchronization Functions

 

 

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