_InterlockedCompareExchange (Windows CE 5.0)
This function atomically compares a variable value to a comparison value and exchanges the value of Destination with Exchange if they are the same.
The function prevents more than one thread from using the same variable simultaneously.
InterlockedCompareExchange( PVOID* Destination, PVOID ExChange, PVOID Comperand);
Parameters
- Destination
[out] Pointer to the value that the function compares to Comperand. - ExChange
[in] Value used to replace contents of Destination, if necessary. - Comperand
[in] Standard value used for comparison to the value in Destination.
Return Values
Initial value of the variable pointed to by Destination.
Remarks
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.
Requirements
Header: winbase.h.
See Also
Intrinsic Functions for MIPS Microprocessors
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