JCL Help:LockedDec@Int64

 JCL Help: LockedDec Function

JCL Functions

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Summary

Thread safe decrement.

Pascal

 function LockedDec(var Target: Integer): Integer; overload;
function LockedDec(var Target: Int64): Int64; overload;
function LockedDec(var Target: NativeInt): NativeInt; overload;

Parameters

Parameters	Description
var Target: Integer	The variable to decrement.

Return Value

The value of Target after being decremented. Note that the actual value of the variable may have already changed!

Description

LockedDec decrements the specified Integer in an atomic, thread-safe manner. 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

LockedAdd LockedSub LockedExchange LockedInc

About

Unit

JclSynch

Donator

Azret Botash

Notes

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

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