InterlockedExchangePointer
InterlockedExchangePointer atomically exchanges a pair of addresses.
Syntax
PVOID InterlockedExchangePointer( PVOID volatile *Target, PVOID Value );
Parameters
Target
A pointer to the value to be exchanged. The function sets this variable to Value, and returns its prior value.
Value
The value to be exchanged with the value pointed to by Target.
Return Value
The function returns the initial value of the Target parameter.
Remarks
This function copies the address passed as the second parameter to the first and returns the original address of the first.
On a 64-bit system, the parameters are 64 bits and the Target parameter must be aligned on 64-bit boundaries; otherwise, the function will behave unpredictably.
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 _InterlockedExchangePointer.
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: