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Re: Event handler in c++

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On 02/14/12 11:14 PM, 88888 Dihedral wrote:
> 在 2012年2月13日星期一UTC+8下午7时52分44秒，Robin Tucker写道：
>> I'm using a templated method to describe, dispatch and handle events
>> in an intuitive manner. For example, describing an event can be done
>> with something like this:
>>
>>      Event<void(std::shared_ptr<Observable>, double, double, double)>
>> MyEvent;
>>
>> , for an event that takes 4 parameters (the "sender" and three
>> doubles). The handler looks like this:
>>
>>      void OnEventHandler(std::shared_ptr<Observable>  sender, double x,
>> double y, double z)
>>      {
>>          // Handle the event.
>>      }
>>
>> And the event is dispatched in the following intuitive way:
>>
>>      MyEvent(shared_from_this(), 3, 2, 1);
>>
>> It's type-safe and you can dispatch any number of parameters (up to 9
>> actually, in the absence of variadic templates in VS2010!). Anyway the
>> code and blog about it can be found here:
>>
>>      http://drrobsjournal.blogspot.com/
>>
>> I hope this is useful to someone.
>
> C++ is not very good to be usd as a language to
> write device drives to be called by the OS.

Yes it is, you just have to provide the OS hooks as extern "C" functions.

> People working on the linux kernal talked about this
> problem for so long.

They are somewhat bigoted.

> Unless functions in the C++ container and template libraries are incorporated into the OS kernal library
> or system shared  linked libraries,  otherwise  C++ compiled  programs are too fat in the heap, too.

"too fat in the heap" ?

In kernel space you have two choices:

1) Use C++ as a better C and avoid the parts that require runtime support.

2) Use a statically linked run time library.

I use one where resources are tight and 2 where they are not.

-- 
Ian Collins

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Thread

Event handler in c++ pratik lala <pratik3558@gmail.com> - 2012-01-22 06:42 -0800
  Re: Event handler in c++ "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-01-22 16:11 +0100
    Re: Event handler in c++ "osmium" <r124c4u102@comcast.net> - 2012-01-22 10:56 -0600
      Re: Event handler in c++ Robert Wessel <robertwessel2@yahoo.com> - 2012-01-22 21:32 -0600
      Re: Event handler in c++ Christopher <cpisz@austin.rr.com> - 2012-01-24 08:25 -0800
        Re: Event handler in c++ Robin Tucker <robinmjtucker@gmail.com> - 2012-02-13 03:52 -0800
          Re: Event handler in c++ 88888 Dihedral <dihedral88888@googlemail.com> - 2012-02-14 02:14 -0800
            Re: Event handler in c++ Ian Collins <ian-news@hotmail.com> - 2012-02-15 07:17 +1300
              Re: Event handler in c++ 88888 Dihedral <dihedral88888@googlemail.com> - 2012-02-14 11:51 -0800
                Re: Event handler in c++ Ian Collins <ian-news@hotmail.com> - 2012-02-15 16:59 +1300
                Re: Event handler in c++ MiB <michael.boehnisch@gmail.com> - 2012-02-15 02:11 -0800
                Re: Event handler in c++ Ian Collins <ian-news@hotmail.com> - 2012-02-16 07:46 +1300
                Re: Event handler in c++ Robert Wessel <robertwessel2@yahoo.com> - 2012-02-15 15:32 -0600
                Re: Event handler in c++ MiB <michael.boehnisch@gmail.com> - 2012-02-16 17:56 -0800
          Re: Event handler in c++ Rui Maciel <rui.maciel@gmail.com> - 2012-02-15 23:11 +0000
    Re: Event handler in c++ pratik lala <pratik3558@gmail.com> - 2012-01-22 16:14 -0800
      Re: Event handler in c++ "Alf P. Steinbach" <alf.p.steinbach+usenet@gmail.com> - 2012-01-23 03:54 +0100

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