Parallel Compression library version 1.2 ...
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From: aminer on 11 Apr 2010 18:00 Hello Parallel Compression library version 1.2 Author: Amine Moulay Ramdane Description: Parallel Gzip , Parallel Zlib and Parallel Bzip algorithms that uses my Thread Pool Engine. And please look at the test examples inside the zipfile: test_pgzip.pas , pzlib.pas , test_pbzip.pas - compile and execute them... - And please see the benchmarks here: http://pages.videotron.com/aminer/ParallelCompression/parallelbzip.htm You can download my Parallel Compression library from: http://pages.videotron.com/aminer/ The Parallel Compression library is VERY easy to use , and here is an example in Object Pascal: - it's a parallel gzip compression - -------------------------- program test; uses ParallelCompression,classes,zlibex,sysutils; var pgzip:TParallelGzip; fstream1,fstream2,fstream3:TFileStream; name:string; begin name:='msvcr100.dll'; // set your your test file ... pgzip:=TParallelGzip.create(4); // number of cores... fstream1:=TFileStream.create(name, fmOpenRead);//+fmShareExclusive); fstream2:=TFileStream.create(name+'.gz',fmCreate);// +fmShareExclusive); // destination of the compression... fstream3:=TFileStream.create(name+'.ok', fmCreate);// +fmShareExclusive); // destination decompression... pgzip.compress(fstream1,fstream2,zclevel9); // select a compressionlevel from // zcNone or zcLevel1 to zcLevel9 writeln; writeln('Parallel compression finished...'); fstream2.position:=0; pgzip.decompress(fstream2,fstream3); writeln; writeln('decompression finished...'); fstream1.free; fstream2.free; fstream3.free; pgzip.free; end. ----------------------------------------------- Language: FPC Pascal v2.2.0+ / Delphi 7+: http://www.freepascal.org/ Operating Systems: Win , Linux and Mac (x86). Required FPC switches: -O3 -Sd -dFPC -dWin32 -dFreePascal -Sd for delphi mode.... Required Delphi switches: -DMSWINDOWS -$H+ For Delphi 5,6,7 use -DDelphi For Delphi 2005,2006,2007,2009,2010+ use the switch -DDELPHI2005+ Sincerely, Amine Moulay Ramdane.
From: aminer on 11 Apr 2010 18:36 Hello, As you have noticed , my Parallel Compression library works on TStreams class.. That means it supports TFileStream(files..) or TMemoryStream(memory...) ... of Object Pascal. Welcome: http://pages.videotron.com/aminer/ Have fun ! :) Take care... Sincerely, Amine Moulay Ramdane.
From: aminer on 11 Apr 2010 19:20
Hello, As you have noticed , i have followed the Divide and Conquer method... First you have to know how to program in procedural and Object Oriented programming and after that you begin parallel programming ... The divide an conquer method works very well in parallel programming also, cause as you have noticed , to be able to engineer the Parallel Compression Library and Parallel Sort etc. i first began to engineer the following fondations: - My lock-free ParallelQueue http://pages.videotron.com/aminer/parallelqueue/parallelqueue.htm - And my Thread Pool Engine that uses my lock-free ParallelQueue http://pages.videotron.com/aminer/threadpool.htm After that, i have developped - in Object Pascal - the Parallel Compression Library that uses my Thread Pool Engine. And as you have noticed. ParallelCompression.pas - look inside the zipfile -, contains a TCallbacks class and both TParallelGzip , TParallelBzip classes inherit from TCallbacks.. And as you have noticed also, my Parallel Compression library works on TStream class.. That means it supports TFileStream(files..) or TMemoryStream(memory...) ... of Object Pascal. Welcome: http://pages.videotron.com/aminer/ And have fun ! :) Sincerely, Amine Moulay Ramdane. |