91b301ae80
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@694 8e941d3f-bd1b-0410-a28a-d453659cc2b4
50 lines
1.1 KiB
ObjectPascal
50 lines
1.1 KiB
ObjectPascal
program RecursiveMTP1;
|
|
|
|
{$mode objfpc}{$H+}
|
|
|
|
uses
|
|
{$IFDEF UNIX}
|
|
cthreads, cmem,
|
|
{$ENDIF}
|
|
MTProcs;
|
|
|
|
type
|
|
TArrayOfInteger = array of integer;
|
|
var
|
|
Items: TArrayOfInteger;
|
|
|
|
type
|
|
TFindMaximumParallelData = record
|
|
Items: TArrayOfInteger;
|
|
Left, Middle, Right: integer;
|
|
LeftMaxIndex, RightMaxIndex: integer;
|
|
end;
|
|
PFindMaximumParallelData = ^TFindMaximumParallelData;
|
|
|
|
procedure FindMaximumParallel(Index: PtrInt; Data: Pointer; Item: TMultiThreadProcItem);
|
|
var
|
|
Params: PFindMaximumParallelData absolute Data;
|
|
LeftParams, RightParams: TFindMaximumParallelData;
|
|
begin
|
|
if Params^.Left+1000>Params^.Right then begin
|
|
// compute the maximum of the few remaining items
|
|
Params^.LeftMaxIndex:=Params^.Items[Params^.Left];
|
|
for i:=Params^.Left+1 to Params^.Right do
|
|
if Params^.Items[i]>Params^.LeftMaxIndex then
|
|
end else begin
|
|
|
|
end;
|
|
end;
|
|
|
|
function FindMaximumIndex(Items: TArrayOfInteger): integer;
|
|
begin
|
|
|
|
end;
|
|
|
|
begin
|
|
SetLength(Items,10000000);
|
|
for i:=0 to length(Items)-1 do Items[i]:=Random(1000);
|
|
ProcThreadPool.DoParallel(@DoSomethingParallel,1,5,nil); // address, startindex, endindex, optional data
|
|
end.
|
|
|