Featuring "parallel loops", "future variables", etc, implemented via a thread pool that is transparent for the application programmer.

-> http://docwiki.embarcadero.com/Libraries/Tokyo/de/System.Threading

-Michael

sorry
-> http://docwiki.embarcadero.com/Libraries/Tokyo/en/System.Threading -Michael

Am 02.02.2018 11:25 schrieb "Michael Schnell via Lazarus" <

:

Featuring "parallel loops", "future variables", etc, implemented via a thread pool that is transparent for the application programmer.

-> http://docwiki.embarcadero.com/Libraries/Tokyo/de/System.Threading

It only relies on already existing functionality (except for those overloads that take a TProc), so feel free to implement this for FPC as no one is planning to implement it currently, so first come, first serve.

Regards,
Sven
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Michael Schnell wrote

Featuring "parallel loops", "future variables", etc, implemented via a thread pool that is transparent for the application programmer.

System.Threading requires anonymous methods, which Free Pascal doesn't currently support. Someone has been working on those, but it's hard to say when they'll be ready for merging. Once that's done someone could start implementing System.Threading, though personally I'd probably just look into adding FPC support to OmniThreadLibrary at that point.

Zoë Peterson wrote

System.Threading requires anonymous methods, which Free Pascal doesn't currently support.

Oops, Sven's right, it mostly doesn't use anonymous methods, so this isn't a blocker.

I've been looking for a replacement to
http://www.omnithreadlibrary.com/ for a long time. If I remember, the dealbreaker is the library's codebase making heavy use of anonymous functions and procedures.

Does System.Threading expose an API that could take either code references or anonymous methods? I'm very interested.

Cheers,
R0b0t1

R0b0t1 wrote

I've been looking for a replacement to http://www.omnithreadlibrary.com/ for a long time. If I remember, the dealbreaker is the library's codebase making heavy use of anonymous functions and procedures.

Yeah, OTL requires anonymous methods. I was hoping to port it to FPC once the anonymous method support landed, but AFAICT the cross platform port got pushed into OTL v4 and it looks like that stalled a year ago.

Does System.Threading expose an API that could take either code references or anonymous methods? I'm very interested.

Yes, System.Threading has both "reference to procedure" and "procedure of object" overloads in the API, so you could implement most of it in the current FPC release. As Sven said, though, no one has started on it, and anyone who did work on it would have to be careful to not taint it with code from Delphi's implementation.

Am 02.02.2018 21:08 schrieb "Zoë Peterson via Lazarus" <

:

Yeah, OTL requires anonymous methods. I was hoping to port it to FPC once the anonymous method support landed, but AFAICT the cross platform port got pushed into OTL v4 and it looks like that stalled a year ago.

Once FPC supports anonymous functions as well I assume that support will start to become alive again. ;)

Does System.Threading expose an API that could take either code

references or anonymous methods? I'm very interested.

Yes, System.Threading has both "reference to procedure" and "procedure of object" overloads in the API, so you could implement most of it in the current FPC release. As Sven said, though, no one has started on it, and anyone who did work on it would have to be careful to not taint it with code from Delphi's implementation.

The suggested way is to write tests for the Delphi implementation and to implement the FPC one based on those tests and the Delphi documentation.

Regards,
Sven
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Sven Barth wrote

Once FPC supports anonymous functions as well I assume that support will start to become alive again. ;)

Hopefully. They were already working on iOS/Android/macOS/Linux support using Delphi, and that's what's stalled. The last commit on the v4 branch was a year ago. I looked into at least getting FPC on Windows running with Blaise's closure branch in Nov/Dec, but stopped because of that and the missing generics. Primož did respond favorably when I asked him about adding FPC support though.