InterlockedBitTestAndSetAcquire function
Tests the specified bit of the specified LONG value and sets it to 1. The operation is atomic, and it is performed with acquire memory ordering semantics.
Syntax
UCHAR WINAPI InterlockedbittestandsetAcquire(
_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 is implemented using a compiler intrinsic where possible. For more information, see the WinBase.h header file and _interlockedbittestandset_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
InterlockedBitTestAndResetAcquire
InterlockedBitTestAndResetRelease