Tuesday, August 01, 2017

OmniThreadLibrary 3.07.3

TL;DR: Update OmniThreadLibrary now!

A nasty bug was found in the DSiWin32 library. It causes the DSiTimeGetTime64 function to work incorrectly when called from multiple threads at the same time. As this function is central to time measurement in the OmniThreadLibrary, it was essential to release new, fixed version.

This version also contains two small enhancements.

  • SetTimer method now accepts TProc and TProc timer methods.
  • IOmniTask implements method InvokeOnSelf which can be used to schedule anonymous function execution from a task back to self.  

As usual, you can get OmniThreadLibrary from GitHub (3.07.3HEAD), download the zip, install it with GetIt (soon, I hope) or with Delphinus (already).

Damn, multithreading is hard!

Thursday, July 06, 2017

OmniThreadLibrary 3.07.2

This is just a small update which adds few helpful methods. Although the change log mentions a potentially breaking change I don't think this will affect anybody. (And if you are not sure, you can enabled backward-compatible behaviour by adding one line to the code.)

I have also (finally) found some time to work on The book. It is now fully up to date (all OmniThreadLibrary features are documented on its whooping 293 pages) and is only missing one or two introductory chapters.

As usual, you can get OmniThreadLibrary from GitHub (3.07.2, HEAD), download the zip, install it with GetIt (soon, I hope) or with Delphinus (already).

Change log follows after the break.

Wednesday, May 24, 2017

RAD Studio 10.2 links

This post contains just a bunch of links to online resources that I mentioned on the today’s presentation.

Monday, May 22, 2017

10.2 Tokyo comes to Slovenia

In two days I’ll present RAD Studio 10.2 Tokyo in Ljubljana.

Click here for more information and to register.

Thursday, May 18, 2017

OmniThreadLibrary 3.07.1

This update brings only few small changes. The biggest of them is support for the Delphi 10.2 Tokyo.

You can get it as a zipped download, git checkout, via Delphinus, and via GetIt.

For more information on OmniThreadLibrary, go to www.omnithreadlibrary.com.

Monday, March 20, 2017

Forward record declaration

Forward declaration is not really a new concept. It was already present in the original Wirth Pascal where it allowed the programmer to do one thing and one thing only – call procedure A from procedure B and procedure B from procedure A. Remember – in ye olde times of good old Pascal we had no interfaces, no classes, no units … just procedures and functions.

Because the code tells more than thousand words, here’s an example (still perfectly valid in modern Object Pascal).

procedure ProcA; forward;

procedure ProcB;

procedure ProcA;

Friday, February 17, 2017

Tuesday, February 07, 2017

OmniThreadLibrary 3.07 beta + plans for OmniThreadLibrary 4.0

It is almost time for a new release! If you’d like to see what 3.07 will contain – or if you just want to test it before it is out – click here.

[If you are a serious OTL user - and especially if you are using pre-Seattle Delphi - please test your program(s) with the beta release. Thanks!]

I have started work on OTL 4.0 which will (fingers crossed) fully support cross-platorm work. Yup, it will work on all platforms that Delphi can compile for! Multiplatform support was implemented by Sean B. Durkin so if OTL/Mobile is something you were waiting for a long time, go to OmniThreadLibrary-For-Mobile Google+ community and express your gratitude.

Thursday, December 08, 2016

RAD Studio and Version Control + Git – links

This post contains just a bunch of links that I refered to in my two-part (live) presentation on version control management with RAD Studio and Git.

Slides for the presentation: pps, pdf

Wednesday, November 30, 2016

Embarcadero Akademija: RAD Studio and Version Control

This is an announcement for the next Slovenian “Embarcadero Academy” session. As it is intended for Slovenian Delphi programmers, the rest of this post is in the Slovenian language.

Monday, November 21, 2016

Debug Faster. Debug Smarter.

My CodeRage XI session on debugging in RAD Studio is now available on YouTube.

If you have missed the presentation or want to see it again, now is a good time :)

Additional materials (slides, code) are available on the Presentations page.

Monday, November 14, 2016

Hear me speak at CodeRage XI

This year I’ll be presenting two sessions at CodeRage XI.

On Wednesday, I’ll be exploring the topic of debugging in RAD Studio. I’ll show how advanced options in breakpoint properties work and drop some debugging tips & tricks here and there. Join me in room 1 at 7 am PST / 10 am EST / 16.00 CET.

On Thursday I’ll be demoing new enhancements in FastMM. If you are writing multithreaded code, then this session will be targeted to you! Join me in room 1 at 10 am PST / 1 pm EST / 19.00 CET.

Saturday, November 05, 2016

Recording Webinars (repost)

As I’m pretty sure many Delphi programmers will be working on their CodeRage XI videos this weekend ;) , I decided to repost a link to my year old post Recording Webinars – My Workflow. Maybe it will be of some use to you.

Monday, October 24, 2016

OmniThreadLibrary 3.06.2

Another week, another critical update …

There was a logical error – also known as “my own stupidity” – built into OTL 3.06 which prevented programs that used OtlCommon to be started on Windows XP. This is now fixed.

There’s also a tiny addition to OtlSync included in this release.

download / git

Wednesday, October 19, 2016

OmniThreadLibrary 3.06.1

There was a nasty bug in DSiWin32 unit included with the 3.06 release so I had no other option than to quickly issue a fix. If you have downloaded version 3.06 then please update to 3.06.1 as with 3.06 you could experience weird crashes during program startup. I’m really sorry for that :(

There’s also a tiny addition to TOmniValue included in this release.

download / git

Monday, October 17, 2016

OmniThreadLibrary 3.06

Hi, guys! After a looong time, a new version of OmniThreadLibrary was released! It is available as a zipped download, git checkout, via Delphinus and (really soon) via GetIt.

Following stuff was added/changed/fixed since the 3.05 release:

Monday, October 10, 2016

ITDevCon 2016

ITDevCon was - as always before - a blast! Great topics, great presenters, great organization and great food!

My presentations (slides and code) are now online at the usual place.

Friday, July 15, 2016

OmniThreadLibrary Everywhere

For the last year and some, Sean B. Durkin has been working on the mobile port of the OmniThreadLibrary. There was lots to be done, as OTL was never designed to be a portable library – after all, it was created in Delphi 2007 times.

Recently I merged his latest commits into the mobile OmniThreadLibrary branch. This version is (by his words) functionally complete (although it may be missing some very recent OTL features) but is very much untested. So Sean is asking everybody that is interested in multithreading on OS/X, iOS, and Android to help him find bugs and to make OTL even more awesome!

Please report any findings to his OmniThreadLibrary-For-Mobile-DevelopmentProject on Google+. I am currently working on other aspects of the OTL and didn’t I put much energy into checking his work.

Wednesday, June 22, 2016

Friday, June 10, 2016

OmniXML Official Repository

In case you are wondering which of the many github (and even bitbucket) omnixml repos is the official one (as www.omnixml.com is still pointing to the old googlecode storage), this is it: https://github.com/mremec/omnixml.

www.omnixml.com should be pointing to the correct repository “real soon now” ;)

Wednesday, May 25, 2016

RAD Studio Berlin 10.1 Notes and Links

In case you are already using RAD Studio Berlin 10.1 or are merely looking into it, these links and notes may help you.

YouTube videos

Thursday, May 19, 2016

RAD Studio 10.1 Berlin presentation in Ljubljana

Next week (Wednesday 25th) I’ll be presenting the new and shiny 10.1 release in Ljubljana.

For more info click here.

Tuesday, March 01, 2016

Defensive Programming and Advanced Debugging

Next Wednesday (9th) I’ll be holding a presentation in Ljubljana. Topic: defensive programming, maintaining a clean code, and debugging tips and tricks. Presentation will be applicable to both Delphi and C++Builder programmers.

As usual, I’ll be presenting in Slovenian language.

For more information and registration click here!

Sunday, February 21, 2016

Finding Memory Allocation Bottlenecks with FastMM4

Recently, I had to find bottlenecks in one of our applications that does all sorts of things related to DVB and is handling real-time reading and sending of data streams over IP with bitrates up to 80 Mb/s (in our lab; in real life maybe even more). Our customer created a configuration which essentially brought the app to the crawl and I had to fix it.

It quickly turned out that although the program was not able to handle the load, the CPU was not very busy. The busiest core was only using about 30% CPU. So I suspected the thread contention problems in FastMM, switched it for SapMM and indeed - the problem went away. CPU load went up and application could again handle the load.

Crisis averted, I took time to find the real problem - excessive get/freemem calls in this program. As far as I could tell, there existed no tool to find that so in a true DIY manner I created my own ;)

Wednesday, November 18, 2015

Connect Your Applications with REST – Links

The materials for my “Connect your applications with REST” workshop are now available online (in Slovenian language).

Below you can find all the interesting DELPHI- and REST-related links I have collected during the preparation of this workshop.

Thursday, November 12, 2015

Connect Your Applications with REST

Next Wednesday (18th) I’ll be holding a presentation about all things RESTish in Delphi. We’ll start with basics and then move to DataSnap, REST Client Library, REST Debugger, BaaS and more!
As usual, I’ll be presenting in Slovenian language.
Register here!

Sunday, October 18, 2015

Friday, October 16, 2015

Recording Webinars – My Workflow

Each time I have to record a webinar, I have trouble remembering how exactly did I do it last time, so I decided to document my workflow. Maybe this will help somebody else besides me …

If you have any ideas on how to improve my workflow or if you have a different way of solving same problems, then please post it in the comment section. Thanks!

[v 1.01: Added screenshots of CamStudio and Filmora settings and few words on Audacity settings.]
[v 1.02: Added appendix A with some time&space information.]

Updating a Progress Bar From a Parallel For Loop (Plus Two Bonuses)

During the Q&A part of my Simplify Parallel Programming with Patterns presentation on CodeRage X, I’ve promised the listeners to publish a demo for updating a progress bar from a parallel for loop.

In this article I’ll try to explain few different approaches that all solve this problem. I’ve also put together a demo project which demonstrates all techniques.

Thursday, September 24, 2015

Links for 10 Seattle Presentation in Ljubljana

Firstly, thanks to everybody who visited my RAD Studio 10 Seattle presentation! I’m sorry I had to improvise because of bad video drivers, but on the other hand RAD Studio performed great!

2015-09-24 09.16.20

Secondly, here is a bunch of links I’ve promised.

OmniThreadLibrary Spotlight now On-line

My short spotlight presentation about high-level OmniThreadLibrary patterns is now available on YouTube.

Wednesday, September 23, 2015

Conditional Compilation with Features

EDIT: Make sure you read this post to the very end!

Are you developing a code that must work in different Delphi versions? Are you sick of writing code like

{$IF CompilerVersion >= 22}
class function Mapper<T1,T2>:

as you a) never know when some feature was introduced into Delphi and b) constantly wonder which version of Delphi has CompilerVersion equal to 22?

Then maybe you could use this simple include file.

Wednesday, September 16, 2015

Learn All About RAD Studio 10 “Seattle” in Ljubljana

Next Thursday (24th) I’ll be presenting new RAD Studio 10 Seattle in Ljubljana. This is announcement for Slovenian readers.

Naslednji četrtek (24.) se mi pridružite v kristalni palači na predstavitvi novega RAD Studia 10 Seattle, ki je po mnenju mnogih (in tudi mojem), ena boljših različic tega programskega orodja v zadnjih letih.

Predstavil vam bom izboljšano podporo za Windows 10 (v VCL in FMX), nove vizualne gradnike, izboljšave v IDE, novo podporo za mobilna okolja (razhroščevanje iOS 64-bit programov, pisanje sistemskih storitev za Android), novosti in izboljšave v sistemskih knjižnicah RTL, pa tudi novosti v prevajalnikih za C++ in še marsikaj.

Več podatkov o dogodku najdete tu.