{ $Id: header,v 1.1 2000/07/13 06:33:45 michael Exp $ This file is part of the Free Component Library (FCL) Copyright (c) 1999-2000 by the Free Pascal development team See the file COPYING.FPC, included in this distribution, for details about the copyright. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. **********************************************************************} program Poolmm1; {$mode objfpc}{$H+} uses Classes, SysUtils, pooledmm; type PMyRecord = ^TMyRecord; TMyRecord = record Next: PMyRecord; Value1, Value2, Value3: integer; end; type TMyRecordMemManager = class(TPooledMemManager) protected procedure FreeFirstItem; override; public procedure DisposeMyRecord(aMyRecord: PMyRecord); function NewMyRecord: PMyRecord; end; procedure TMyRecordMemManager.FreeFirstItem; var AMyRecord: PMyRecord; begin AMyRecord:=PMyRecord(FFirstFree); PMyRecord(FFirstFree):=AMyRecord^.Next; Dispose(AMyRecord); {$push}{$R-} inc(FFreedCount); {$pop} end; procedure TMyRecordMemManager.DisposeMyRecord(AMyRecord: PMyRecord); begin if (FFreeCount<FMinFree) or (FFreeCount<((FCount shr 3)*FMaxFreeRatio)) then begin // add AMyRecord to Free list AMyRecord^.Next:=PMyRecord(FFirstFree); PMyRecord(FFirstFree):=AMyRecord; inc(FFreeCount); end else begin // free list full -> free the item Dispose(AMyRecord); {$push}{$R-} inc(FFreedCount); {$pop} end; dec(FCount); end; function TMyRecordMemManager.NewMyRecord: PMyRecord; begin if FFirstFree<>nil then begin // take from free list Result:=PMyRecord(FFirstFree); PMyRecord(FFirstFree):=Result^.Next; dec(FFreeCount); end else begin // free list empty -> create new item New(Result); {$push}{$R-} inc(FAllocatedCount); {$pop} end; FillChar(Result^, SizeOf(TMyRecord), 0); inc(FCount); end; const MyRecordMemManager: TMyRecordMemManager = nil; var MyRecord: PMyRecord; begin // init the manager for PMyRecord MyRecordMemManager:=TMyRecordMemManager.Create; MyRecordMemManager.MinimumFreeCount:=1000; // allocate one record MyRecord:=MyRecordMemManager.NewMyRecord; // free the record MyRecordMemManager.DisposeMyRecord(MyRecord); // free the manager MyRecordMemManager.Free; end.