Interlocked Functions
A version of this page is also available for
4/8/2010
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 Mobile supports.
| Function | Description |
|---|---|
Increments a shared variable, and checks the resulting value. |
|
Decrements a shared variable, and checks the resulting value. |
|
Exchanges the values of specified variables. |
|
Exchanges the values of specified variables if one variable is set to a specified value. |
|
Compares the values of specified values and exchange the values based on the outcome. |
|
Performs an atomic addition of an increment value to an addend value. |
|
Performs an atomic comparison of specified values, and exchanges the values, based on the outcome of the comparison. |
|
Atomically exchanges a pair of values. |