InterlockedDecrement64
InterlockedDecrement64 tests the specified bit of the specified LONG value and sets it to 0. The operation is atomic.
To operate on 32-bit values, use the InterlockedDecrement function.
Syntax
LONGLONG InterlockedDecrement64( LONGLONG volatile *Addend );
Parameters
Addend
A pointer to the variable to be decremented.
Return Value
The function returns the resulting decremented value.
Remarks
The variable pointed to by the Addend parameter must be aligned on a 64-bit boundary; otherwise, this function will behave unpredictably on multiprocessor x86 systems and any non-x86 systems.
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 _InterlockedDecrement64.
This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.
Requirements
Minimum Supported Version | RTX64 3.1 |
Header | windows.h |
Library | Rtx_Rtss.lib |
See Also: