Interlocked Functions (Windows Embedded CE 6.0)

1/6/2010

Interlocked functions synchronize access to a variable that is shared by multiple threads.

Their purpose is to prevent a thread from being preempted while it is incrementing or checking a variable.

The threads of different processes can use these functions as long as their variables share memory.

The following table describes the interlocked functions that Windows Embedded CE supports.

Function	Description
InterlockedIncrement	Increments a shared variable, and checks the resulting value.
InterlockedDecrement	Decrements a shared variable, and checks the resulting value.
InterlockedExchange	Exchanges the values of specified variables.
InterlockedTestExchange	Exchanges the values of specified variables if one variable is set to a specified value.
InterlockedCompareExchange	Compares the values of specified values and exchange the values based on the outcome.
InterlockedCompareExchangePointer	Performs an atomic addition of an increment value to an addend value.
InterlockedExchangePointer	Performs an atomic comparison of specified values, and exchanges the values, based on the outcome of the comparison.
InterlockedExchangeAdd	Atomically exchanges a pair of values.

See Also