Unit 'System' Package
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InterlockedExchange

Exchange 2 integers in a thread-safe way.

Declaration

Source position: systemh.inc line 1596

function InterlockedExchange(

  var Target: LongInt;

  Source: LongInt

):LongInt;

function InterlockedExchange(

  var Target: Pointer;

  Source: Pointer

):Pointer;

function InterlockedExchange(

  var Target: Cardinal;

  Source: Cardinal

):Cardinal;

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.


Documentation generated on: Oct 27 2024