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[Overview][Constants][Types][Classes][Procedures and functions][Variables] Reference for unit 'System' (#rtl)

InterLockedExchange

Exchange 2 integers in a thread-safe way

Declaration

Source position: line 0

function InterLockedExchange(

  var Target: LongInt;

  Source: LongInt

):LongInt;

function InterLockedExchange(

  var Target: Pointer;

  Source: Pointer

):Pointer;

Description

InterLockedExchange stores Source in Target and returns the old value of Target. This is done in a thread-safe way, i.e., only one processor is accessing the Target variable at a time.

Errors

None.

See also

InterLockedDecrement

  

Thread-safe decrement

InterLockedIncrement

  

Thread-safe increment

InterLockedExchangeAdd

  

Thread-safe add and exchange of 2 values

InterlockedCompareExchange

  

Conditional exchange

Notes

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