Threadpool version 1.1 is here...

aminer10 — Wed, 24 Mar 2010 03:17:53 GMT

Hello all,

Description:

Lock-free threadpool.

The following have been added:

-- Lockfree ParallelQueue for less contention and more efficiency or
it can use lockfree_mpmc - flqueue that i have modified, enhanced and
improved... -

- Work-stealing - for more efficiency -

- Enters in a wait state when there no job in the queue, hence, it's
very efficient

Look into define.inc there is many options:

CPU32: for 32 bits architecture
MUTIPLE_PRODUCER: mutiple producer (threads)
ParallelQueue: does use ParallelQueue - very efficient -
Lockfree_MPMC: does use Lockfree_SPMC
ParallelQueueh: does use ParallelQueueh - ParallelQueueh is for
educational purpose -
SINGLE_PRODUCER: for a single producer (thread)

Required switches: -Sd (Delphi mode) for FPC

Please look at the examples test.pas and testpool.pas inside the
zip...

Note: testpool.pas does require Delphi 5+, test.pas works with both
FreePascal and Delphi

You can download Threadpool 1.1 from:

http://pages.videotron.com/aminer/

Language: FPC Pascal v2.2.0+ / Delphi 5+: http://www.freepascal.org/

Operating Systems: Win , Linux and Mac (x86).

Threadpool is *VERY* easy to use, here is an example:

-----------------------------------------------------------------------------------

program test;

uses
{$IFDEF Delphi}
cmem,
{$ENDIF}
ThreadPool,sysutils,syncobjs;

{$I defines.inc}

type
TMyThread = class (TThreadPoolThread)
//procedure ProcessRequest(obj: Pointer); override;

procedure MyProc1(obj: Pointer);
procedure MyProc2(obj: Pointer);

end;

var
myobj:TMyThread;
TP: TThreadPool;
obj:pointer;
cs:TCriticalSection;

procedure TMyThread.MyProc1(obj: Pointer);
begin

cs.enter;
writeln('This is MyProc1 with parameter: ',integer(obj));
cs.leave;

end;

procedure TMyThread.MyProc2(obj: Pointer);
begin

cs.enter;
writeln('This is MyProc2 with parameter: ',integer(obj));
cs.leave;

end;

begin

myobj:=TMyThread.create;

cs:=TCriticalSection.create;

TP := TThreadPool.Create(4, 20, TMyThread); // 4 workers threads and
2^20 items for each queue.

obj:=pointer(1);
TP.execute(myobj.myproc1,pointer(obj));

obj:=pointer(2);
TP.execute(myobj.myproc2,pointer(obj));

readln;

TP.Terminate;
TP.Free;

end.

----------------------------------------------------------------------------

Sincerely,
Amine Moulay Ramdane.

topic Threadpool version 1.1 is here... in Intel® Moderncode for Parallel Architectures

Threadpool version 1.1 is here...