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# Conflicts: # cad_source/zengine/styles/uzestyleslayers.pas # environment/typeexporter/zcad.files
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cad_source/components/zcontainers/gzctnrbufferallocator.pas
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| { | ||
| ***************************************************************************** | ||
| * * | ||
| * This file is part of the ZCAD * | ||
| * * | ||
| * See the file COPYING.txt, 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. * | ||
| * * | ||
| ***************************************************************************** | ||
| } | ||
| { | ||
| @author(Andrey Zubarev <[email protected]>) | ||
| } | ||
| unit gzctnrBufferAllocator; | ||
| {$Mode delphi} | ||
|
|
||
| interface | ||
| uses | ||
| gvector,//gzctnrVector, | ||
| garrayutils, | ||
| sysutils; | ||
| type | ||
| GBufferAllocator<GOffset,GSize,GData>=object | ||
| public | ||
| type | ||
| TOffset=GOffset; | ||
| TSize=GSize; | ||
| TData=GData; | ||
| TBufferRange=record | ||
| public | ||
| var | ||
| Offset:TOffset; | ||
| Size:TSize; | ||
| Data:TData; | ||
| public | ||
| Constructor CreateFreeRange(const AOffset:TOffset;const ASize:TSize;const AData:TData); | ||
| end; | ||
| PBufferRange=^TBufferRange; | ||
| TRanges=TVector<TBufferRange>; | ||
| TIndexInRanges=SizeInt; | ||
| TFreeRangesIndexs=TVector<TIndexInRanges>; | ||
| TMoveAllocadetRange=procedure(const oldI,newI:TIndexInRanges;const AData:TData); | ||
| var | ||
| AllocatedRanges:TRanges; | ||
| FreeRanges:TRanges; | ||
| onMoveAllocadetRange:TMoveAllocadetRange; | ||
| const | ||
| CWrongIndexInRanges=-1; | ||
| private | ||
| function FindFreeRange(const ASize:TSize):TIndexInRanges; | ||
| public | ||
| constructor Init(ABufSize:TSize); | ||
| destructor done;virtual; | ||
| function Allocate(ASize:TSize;Adata:GData):TIndexInRanges; | ||
| procedure Release(Index:TIndexInRanges); | ||
| function CalcFragmentation:Double; | ||
| end; | ||
| implementation | ||
| Constructor GBufferAllocator<GOffset,GSize,GData>.TBufferRange.CreateFreeRange(const AOffset:TOffset;const ASize:TSize;const AData:TData); | ||
| begin | ||
| Offset:=AOffset; | ||
| Size:=ASize; | ||
| Data:=Adata; | ||
| end; | ||
|
|
||
| constructor GBufferAllocator<GOffset,GSize,GData>.Init(ABufSize:TSize); | ||
| begin | ||
| AllocatedRanges:=TRanges.Create; | ||
| AllocatedRanges.Reserve(4*1024*1024); | ||
| FreeRanges:=TRanges.Create; | ||
| FreeRanges.Reserve(4*1024); | ||
| FreeRanges.PushBack(TBufferRange.CreateFreeRange(0,ABufSize,-1)); | ||
| onMoveAllocadetRange:=nil; | ||
| end; | ||
| destructor GBufferAllocator<GOffset,GSize,GData>.done; | ||
| begin | ||
| AllocatedRanges.destroy; | ||
| FreeRanges.destroy; | ||
| end; | ||
|
|
||
| function GBufferAllocator<GOffset,GSize,GData>.FindFreeRange(const ASize:TSize):TIndexInRanges; | ||
| var | ||
| i:TIndexInRanges; | ||
| pbr:PBufferRange; | ||
| tds,ds:SizeInt; | ||
| begin | ||
| result:=CWrongIndexInRanges; | ||
| ds:=high(ds); | ||
| for i:=0 to FreeRanges.size-1 do begin | ||
| pbr:=FreeRanges.Mutable[i]; | ||
| tds:=pbr^.Size-ASize; | ||
| if tds=0 then begin | ||
| exit(i); | ||
| end else if pbr^.Size>ASize then begin | ||
| if (tds<ds)or(result=CWrongIndexInRanges) then begin | ||
| ds:=tds; | ||
| result:=i; | ||
| end; | ||
| end; | ||
| end; | ||
| end; | ||
|
|
||
| function GBufferAllocator<GOffset,GSize,GData>.CalcFragmentation:Double; | ||
| var | ||
| i:SizeUInt; | ||
| pbr:PBufferRange; | ||
| total,largest:TSize; | ||
| begin | ||
| pbr:=FreeRanges.Mutable[0]; | ||
| total:=pbr^.Size; | ||
| largest:=pbr^.Size; | ||
| for i:=1 to FreeRanges.size-1 do begin | ||
| pbr:=FreeRanges.Mutable[i]; | ||
| if largest<pbr^.Size then | ||
| largest:=pbr^.Size; | ||
| total:=total+pbr^.Size; | ||
| end; | ||
| result:=(Total-Largest)/total; | ||
| end; | ||
|
|
||
| function GBufferAllocator<GOffset,GSize,GData>.Allocate(ASize:TSize;Adata:GData):TIndexInRanges; | ||
| var | ||
| SuitableFreeRangeIndex:TIndexInRanges; | ||
| FreeRangesIndex:SizeUInt; | ||
| pbr:PBufferRange; | ||
| nbr:TBufferRange; | ||
| begin | ||
| SuitableFreeRangeIndex:=FindFreeRange(ASize); | ||
| if SuitableFreeRangeIndex=CWrongIndexInRanges then | ||
| raise Exception.Create('Cannot allocate'); | ||
| pbr:=FreeRanges.Mutable[SuitableFreeRangeIndex]; | ||
| if pbr^.Size<>ASize then begin | ||
| nbr.CreateFreeRange(pbr^.Offset,Asize,Adata); | ||
| pbr^.Offset:=pbr^.Offset+Asize; | ||
| pbr^.Size:=pbr^.Size-Asize; | ||
| Result:=AllocatedRanges.size; | ||
| AllocatedRanges.PushBack(nbr); | ||
| end else begin | ||
| Result:=AllocatedRanges.size; | ||
| AllocatedRanges.PushBack(FreeRanges.mutable[SuitableFreeRangeIndex]^); | ||
| FreeRanges.mutable[SuitableFreeRangeIndex]^:=FreeRanges.back; | ||
| FreeRanges.popback; | ||
| end; | ||
| end; | ||
| procedure GBufferAllocator<GOffset,GSize,GData>.Release(Index:TIndexInRanges); | ||
| var | ||
| SuitableRangeIndex:TIndexInRanges; | ||
| pbr:PBufferRange; | ||
| nbr:TBufferRange; | ||
| begin | ||
| FreeRanges.PushBack(AllocatedRanges.Mutable[Index]^); | ||
| if @onMoveAllocadetRange<>nil then | ||
| onMoveAllocadetRange(AllocatedRanges.size-1,Index,AllocatedRanges.back.data); | ||
| AllocatedRanges.mutable[Index]^:=AllocatedRanges.back; | ||
| AllocatedRanges.popback; | ||
| end; | ||
| begin | ||
| end. |
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