Wednesday, July 29, 2015

Double Bill: OmniThreadLibrary 3.04b & a Book Update

I have just updated OmniThreadLibrary to version 3.04b. This is kinda important update as I somehow messed the 3.04a release which did not include support for more than 60 concurrent tasks that was added in version 3.04. This important feature is now back and I’ve added few other small improvements.

Changelog for this release:

  • Reimplemented support for TWaitFor in the TOmniTaskControl which was removed from the code in release 3.04a by mistake.
  • Implemented TOmniSingleThreadUseChecker, a record which checks that the owner is only used from one thread.
  • TOmniCommunicationEndpoint.ReceiveWait and .SendWait are now fully thread-safe and support multiple consumers (former) and multiple producers (latter).

Version 3.04b can be downloaded here. Alternatively, you can check out this release or update to the trunk.

I have also released a new version of “the book” which is now 239 pages long! Following sections were added/updated:

  • Documented TOmniValue.
  • Documented TWaitFor.
  • Documented TOmniLockManager.
  • Documented TOmniSingleThreadUseChecker.
  • Adapted Communication Subsystem documentation.

Sunday, July 12, 2015

OmniThreadLibrary Book Update

After a (much too) long time, I have (finally) found some time to work on my book “Parallel Programming with OmniThreadLibrary”. For starters, I have updated existing content so that the current version (3.04) is properly documented. The following topics were added/updated:

  • Documented Parallel.For.
  • Documented Parallel.Map.
  • Documented TOmniBlockCollection.ToArray<T>.
  • Added longer example for Parallel.For.
  • Documented IOmniTaskConfig.SetPriority and .ThreadPool.
  • Documented Parallel.Pipeline.PipelineStage[] property.
  • Documented new demos.
  • Documented other changes and additions.
  • Updated hyperlinks.

Update is free (as it always was and as it will always be) for all owners of the book. You probably already received an email with details. If not, you should just go to LeanPub and download the new version.

You can buy the book (and with that support the OmniThreadLibrary development) here.

GpSQLBuilder Improvements

Thanks to [leledumbo], GpSQLBuilder now works with the FPC pascal and supports the INSERT statement.

You can now write statements such as:

  query := CreateGpSQLBuilder
.&Set(COL_1, [42])
.&Set(COL_2, 'abc')

Which will give you:

INSERT INTO Test (Column1, Column2) VALUES (42, 'abc')

Saturday, July 04, 2015

Using OmniThreadLibrary’s Message Queue with a TThread Worker

A reader recently asked about using OmniThreadLibrary’s communication channels with a TThread-based worker thread so I prepared a simple example, now part of the OTL repository (stored in the folder examples\TThread communication).
Two separate topics are covered in this example:
  • Sending data from any thread (main or background) to a TThread-based worker.
  • Sending data from a TThread-based worker to a form.