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Multi-threading questions
by Bernd Schoeller
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Hi,
a couple for questions concerning the libraries delivered with ES and multi-threading: 1) Is there a list which libraries and classes are 'thread-safe'? 2) Are there thread-safe data-structures? Is there an implementation of a non-blocking queue? 3) Is there a facility similar to the (Unix) select system call that can be used to avoid multi-threading in many cases? I have seen it available in ePosix, but not (yet) found it in EiffelBase. Thanks for any answers, Bernd ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/eiffel_software/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/eiffel_software/join (Yahoo! ID required) <*> To change settings via email: mailto:eiffel_software-digest@... mailto:eiffel_software-fullfeatured@... <*> To unsubscribe from this group, send an email to: eiffel_software-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |
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RE: Multi-threading questions
by Emmanuel Stapf [ES]
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> 1) Is there a list which libraries and classes are 'thread-safe'?
All Eiffel libraries apart from the Eiffel Thread library are not thread-safe and will require some synchronization objects to be used safely from different threads. Eiffel libraries are re-entrant though. > 2) Are there thread-safe data-structures? Is there an > implementation of a non-blocking queue? Not that I know. > 3) Is there a facility similar to the (Unix) select system > call that can be used to avoid multi-threading in many cases? > I have seen it available in ePosix, but not (yet) found it in > EiffelBase. `select' is very limited on Windows, it can only work with socket by default (EiffelNet uses it internally). I'm not sure how it is implemented in ePosix for Windows in a general manner. And if you have a UI application, usually the UI event loop can be used as a replacement. Regards, Manu ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/eiffel_software/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/eiffel_software/join (Yahoo! ID required) <*> To change settings via email: mailto:eiffel_software-digest@... mailto:eiffel_software-fullfeatured@... <*> To unsubscribe from this group, send an email to: eiffel_software-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |
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Re: Multi-threading questions
by Berend de Boer
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>>>>> "Emmanuel" == Emmanuel Stapf [ES] <manus@...> writes:
Emmanuel> `select' is very limited on Windows, it can only work with Emmanuel> socket by default (EiffelNet uses it internally). I'm not Emmanuel> sure how it is implemented in ePosix for Windows in a Emmanuel> general manner. It isn't. Sockets only. -- Cheers, Berend de Boer [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/eiffel_software/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/eiffel_software/join (Yahoo! ID required) <*> To change settings via email: mailto:eiffel_software-digest@... mailto:eiffel_software-fullfeatured@... <*> To unsubscribe from this group, send an email to: eiffel_software-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |
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Re: Multi-threading questions
by Patrick Ruckstuhl
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Hi Bernd,
> a couple for questions concerning the libraries delivered with ES and > multi-threading: > > 1) Is there a list which libraries and classes are 'thread-safe'? > > 2) Are there thread-safe data-structures? Is there an implementation of a > non-blocking queue? There are some data structures in the thread extension library that can abstract the multithreading for some situations http://thread_extension.origo.ethz.ch/ Regards, Patrick ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/eiffel_software/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/eiffel_software/join (Yahoo! ID required) <*> To change settings via email: mailto:eiffel_software-digest@... mailto:eiffel_software-fullfeatured@... <*> To unsubscribe from this group, send an email to: eiffel_software-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |
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Re: Multi-threading questions
by Bernd Schoeller
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On Mon, 21 Apr 2008 02:34:23 +0200, Berend de Boer <berend@...>
wrote: >>>>>> "Emmanuel" == Emmanuel Stapf [ES] <manus@...> writes: > > Emmanuel> `select' is very limited on Windows, it can only work with > Emmanuel> socket by default (EiffelNet uses it internally). I'm not > Emmanuel> sure how it is implemented in ePosix for Windows in a > Emmanuel> general manner. > > It isn't. Sockets only. > This is crap. How can such a basic functionality be missing? Now I understand why so many Windows programmers love multi-threading. *sigh* Bernd ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/eiffel_software/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/eiffel_software/join (Yahoo! ID required) <*> To change settings via email: mailto:eiffel_software-digest@... mailto:eiffel_software-fullfeatured@... <*> To unsubscribe from this group, send an email to: eiffel_software-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |
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Re: Multi-threading questions
by Berend de Boer
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>>>>> "Bernd" == Bernd Schoeller <bernd.schoeller@...> writes:
Bernd> This is crap. How can such a basic functionality be missing? Bernd> Now I understand why so many Windows programmers love Bernd> multi-threading. Or switch to a decent platform :-) -- Cheers, Berend de Boer [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/eiffel_software/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/eiffel_software/join (Yahoo! ID required) <*> To change settings via email: mailto:eiffel_software-digest@... mailto:eiffel_software-fullfeatured@... <*> To unsubscribe from this group, send an email to: eiffel_software-unsubscribe@... <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ |
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