Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Tests the specified bit of the specified LONG value and sets it to 0. The operation is atomic.
Syntax
BOOLEAN _interlockedbittestandreset(
[in] LONG volatile *Base,
[in] LONG Offset
);
Parameters
[in] Base
A pointer to a variable.
[in] Offset
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 is implemented using a compiler intrinsic where possible. For more information, see the WinBase.h header file and _interlockedbittestandreset.
This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.
Note This function is supported on Windows RT-based systems.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | winnt.h (include Windows.h) |
See also
InterlockedBitTestAndResetAcquire
InterlockedBitTestAndResetRelease
InterlockedBitTestAndSetAcquire