JCL Help:LockedExchangeAdd@Int64@Int64

 JCL Help: LockedExchangeAdd Function

JCL Functions

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Summary

Thread safe addition.

Pascal

 function LockedExchangeAdd(var Target: Integer; Value: Integer): Integer; overload;
function LockedExchangeAdd(var Target: Int64; Value: Int64): Int64; overload;

Parameters

Parameters	Description
var Target: Integer	The target variable to add Value to.
Value: Integer	The value to add to Target

Return Value

The value of Target before the addition.

Description

LockedExchangeAdd implements threadsafe addition for integers. The function adds Value to Target and returns the previous value of Target. The LockedXxx functions allow for a simple and efficient way for applications to synchronize access to and manipulate integer variables which are shared by multiple threads.

See Also

LockedExchangeSub LockedExchange LockedExchangeInc LockedExchangeDec

About

Unit

JclSynch

Donator

Azret Botash

Notes

The Win32 API provides similar functions. Look up InterlockedXxx in the Platform SDK.

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