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This function atomically exchanges a pair of values. The function prevents more than one thread from using the same variable simultaneously.

If you are exchanging pointer values, this function supersedes InterlockedExchange.

PVOID InterlockedExchangePointer(
  PVOID* Target,
  PVOID Value


[in, out] Pointer to the pointer to the value to exchange. The function sets the value to Value.


[in] New value for Target.

Initial value pointed to by Target.

The interlocked functions provide a simple mechanism for synchronizing access to a variable that is shared by multiple threads. The threads of different processes can use this mechanism, if the variable is in shared memory.

Windows Embedded CEWindows CE .NET 4.0 and later
Windows MobileWindows Mobile Version 5.0 and later

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