Windows apps
Collapse the table of content
Expand the table of content
Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

InterlockedIncrementAcquire function

Increments (increases by one) the value of the specified 32-bit variable as an atomic operation. The operation is performed using acquire memory ordering semantics.

Syntax


LONG __cdecl InterlockedIncrementAcquire(
  _Inout_ LONG 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 32-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 _InterlockedIncrement_acq.

For processors that do not support acquire memory ordering semantics, this function is defined as a call to the InterlockedIncrement function. For more information, see WinBase.h.

Note  This function is supported on Windows RT-based systems.
 

Requirements

Minimum supported client

Windows Vista [desktop apps | Windows Store apps]

Minimum supported server

Windows Server 2003 [desktop apps | Windows Store apps]

Header

WinBase.h (include Windows.h)

See also

Interlocked Variable Access
InterlockedIncrement
InterlockedIncrementRelease
InterlockedIncrementNoFence
InterlockedIncrement16
InterlockedIncrement16Acquire
InterlockedIncrement16Release
InterlockedIncrement16NoFence
InterlockedIncrement64
InterlockedIncrementAcquire64
InterlockedIncrementRelease64
InterlockedIncrementNoFence64
InterlockedDecrement
Synchronization Functions

 

 

Show:
© 2016 Microsoft