InterlockedExchange16

InterlockedExchange16 sets a 16-bit variable to the specified value as an atomic operation.

Syntax

Copy

SHORT InterlockedExchange16(
        SHORT volatile *Destination,
        SHORT           ExChange
);

Parameters

Destination

A pointer to the value to be exchanged. The function sets this variable to ExChange and returns its prior value.

Exchange

The value to be exchanged with the value pointed to by Destination.

Return Value

The function returns the initial value of the Destination parameter.

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 _InterlockedExchange16.

This function generates a full memory barrier (or fence) to ensure that memory operations are completed in the proper sequence.

To operate on a pointer variable, use the InterlockedExchangePointer function.

To operate on a 32-bit variable, use the InterlockedExchange function.

To operate on a 64-bit variable, use the InterlockedExchange64 function.

Requirements

Minimum supported version	Header	Library
eRTOS 1.0 SDK	windows.h	rtkrnl.lib