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Re: Job package: A lightweight multithreading tool, using promise/future mechanism [message #48757 is a reply to message #48756]

Sun, 10 September 2017 21:16

Oblivion is currently offline

Oblivion
Messages: 1093
Registered: August 2007

Senior Contributor

Hello Mirek, and thank you for your patience.

Quote:

mirek
OK, so the difference is

- "return" semantics (implemented using promise/future)
- error states

Right?

If true, what about using future / promise directly? IMO the only problem is to have them interfaced with Thread and/or CoWork (for different kinds of usage).

Well, Job is one way of having them interfaced with U++ Thread. Using f/p pair directly is somewhat cumbersome.
However, TBH, what I really see lacking in multithreading tools in general is a simple error handling mechanism, and a per-thread shutdown mechanism.
This is the one of the reasons why I've come up with the Job class. It is also an attempt to solve these problems.

E.g.
Thread.IsError()
Thread.GetError()
Thread.GetErrorDesc()
Thread.ShutDown()
and
Thread::Error (exception)

As you can see in the Job.hpp these are not very hard to implement. (I don't see why it should be difficult for Thread at least (performance?). Cowork, being a job queue, is naturally a more complex beast.)

Best regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
upp-components: https://github.com/ismail-yilmaz/upp-components
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Sun, 10 September 2017 21:34]

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[Message index]

		Job package: A lightweight worker thread for non-blocking operations. By: Oblivion on Sun, 10 September 2017 12:29
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: mirek on Sun, 10 September 2017 15:08
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: mirek on Sun, 10 September 2017 15:56
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: Oblivion on Sun, 10 September 2017 17:05
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: Oblivion on Sun, 10 September 2017 19:08
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: mirek on Sun, 10 September 2017 20:13
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: Oblivion on Sun, 10 September 2017 21:16
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: mirek on Mon, 11 September 2017 00:06
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: Oblivion on Mon, 11 September 2017 00:25
		RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Sun, 17 September 2017 23:20
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Mon, 18 September 2017 08:23
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Mon, 18 September 2017 08:29
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 19 September 2017 00:01
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 19 September 2017 08:37
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 19 September 2017 08:53
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 19 September 2017 10:12
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 19 September 2017 08:12
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 19 September 2017 10:15
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 19 September 2017 10:24
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 19 September 2017 11:12
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 19 September 2017 12:31
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 19 September 2017 13:01
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Sat, 23 September 2017 14:17
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Sat, 07 October 2017 15:03
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Sat, 07 October 2017 15:51
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Sat, 07 October 2017 16:04
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Sun, 08 October 2017 15:01
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 10 October 2017 11:51
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 10 October 2017 16:10
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 10 October 2017 17:02
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Tue, 10 October 2017 20:51
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Tue, 10 October 2017 23:48
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Wed, 11 October 2017 09:23
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Wed, 11 October 2017 09:42
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Wed, 11 October 2017 09:47
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Wed, 11 October 2017 09:50
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: mirek on Wed, 11 October 2017 19:30
		Re: RE: Job package: A scope-bound worker thread for non-blocking operations. By: Oblivion on Wed, 11 October 2017 20:14
		Re: Job package: A lightweight multithreading tool, using promise/future mechanism By: mirek on Sun, 10 September 2017 20:09

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