Tests the specified bit of the specified LONG value and sets it to 0. The operation is atomic, and it is performed with acquire memory ordering semantics.
Syntax
unsigned char __cdecl InterlockedbittestandresetAcquire(
_Inout_ LONG volatile ,
_In_ LONG
);
Parameters
** [in, out]
A pointer to a variable.LONG [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 is implemented using a compiler intrinsic where possible. For more information, see the WinBase.h header file and _interlockedbittestandreset_acq.
Note This function is supported on Windows RT-based systems.
Requirements
Minimum supported client |
Windows 8 [desktop apps only] |
Minimum supported server |
Windows Server 2012 [desktop apps only] |
Header |
Winnt.h (include Windows.h) |
See also
InterlockedBitTestAndResetRelease
InterlockedBitTestAndSetAcquire