InterlockedDecrement16 function
Decrements (decreases by one) the value of the specified 16-bit variable as an atomic operation.
To operate on 32-bit values, use the InterlockedDecrement function.
To operate on 64-bit values, use the InterlockedDecrement64 function.
Syntax
short __cdecl InterlockedDecrement16( _Inout_ short volatile *Addend );
Parameters
- Addend [in, out]
-
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 16-bit boundary; otherwise, this function will behave unpredictably on multiprocessor x86 systems and any non-x86 systems. See _aligned_malloc.
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 _InterlockedDecrement16.
This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.
Requirements
|
Minimum supported client |
Windows 8 [desktop apps only] |
|---|---|
|
Minimum supported server |
Windows Server 2012 [desktop apps only] |
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Header |
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See also
- Interlocked Variable Access
- InterlockedDecrement
- InterlockedDecrementAcquire
- InterlockedDecrementRelease
- InterlockedDecrementNoFence
- InterlockedDecrement16Acquire
- InterlockedDecrement16Release
- InterlockedDecrement16NoFence
- InterlockedDecrement64
- InterlockedDecrementAcquire64
- InterlockedDecrementRelease64
- InterlockedDecrementNoFence64
- Synchronization Functions