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Tests the specified bit of the specified LONG64 value and sets it to 0. The operation is atomic.
Syntax
BOOLEAN _interlockedbittestandreset64(
[in] LONG64 volatile *Base,
[in] LONG64 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 _interlockedbittestandreset64.
This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Windows |
| Header | winnt.h (include Windows.h) |
See also
InterlockedBitTestAndResetAcquire
InterlockedBitTestAndResetRelease
InterlockedBitTestAndSetAcquire