InterlockedIncrement64 function
Increments (increases by one) the value of the specified 64-bit variable as an atomic operation.
To operate on 32-bit values, use the InterlockedIncrement function.
Syntax
LONGLONG __cdecl InterlockedIncrement64(
_Inout_ LONGLONG volatile *Addend
);
Parameters
- Addend [in, out]
-
A pointer to the variable to be incremented.
Return value
The function returns the resulting incremented 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. 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 _InterlockedIncrement64.
This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.
Itanium-based systems: For performance-critical applications, use InterlockedIncrementAcquire64 or InterlockedIncrementRelease64 instead.
Note This function is supported on Windows RT-based systems.
Note
Requirements
|
Minimum supported client | Windows Vista [desktop apps | Windows Store apps] |
|---|---|
|
Minimum supported server | Windows Server 2003 [desktop apps | Windows Store apps] |
|
Header |
|
See also
- Interlocked Variable Access
- InterlockedIncrement
- InterlockedIncrementAcquire
- InterlockedIncrementRelease
- InterlockedIncrementNoFence
- InterlockedIncrement16
- InterlockedIncrement16Acquire
- InterlockedIncrement16Release
- InterlockedIncrement16NoFence
- InterlockedIncrementAcquire64
- InterlockedIncrementRelease64
- InterlockedIncrementNoFence64
- InterlockedDecrement
- Synchronization Functions
Send comments about this topic to Microsoft
Build date: 12/18/2012
