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Re: good reference on threads

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On 6/11/2021 4:03 AM, Paavo Helde wrote:
> 11.06.2021 04:31 Lynn McGuire kirjutas:
>>
>> I want multiple threads to share the massive dataset that we use.  
>> Very tricky, I have tried sharing data between the threads and it was 
>> a disaster.
> 
> MFC is not thread-safe, so only the main thread can call any MFC functions.
> 
> For data exchange the most robust way is to use a couple of message 
> queues for passing events back and forth between the threads. Any data 
> which is not MT-safe to access should be copied by value into a new 
> non-shared object when putting into the queue.
> 
> One can easily build such a queue with a std::queue and a std::mutex.
> 
> For example, if a background queue wants to display a message to the 
> user, it can send an event to the main thread queue containing the 
> message. The main thread would check in a MFC OnIdle() function if there 
> are any events in the queue, and process them in the main thread.
> 

Oh I missed the MFC usage. Actually used it a couple of times in the 
early to mid 90's. Hummm, well, for a multi_producer-to-single_consumer 
relationship, if one can get over a LIFO order, this construction might 
be of use to the OP:

https://groups.google.com/g/comp.lang.c++/c/1gppAtQpIQk/m/XX8-VDoMBgAJ

One can also reverse the LIFO to get a FIFO.

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Thread

good reference on threads Lynn McGuire <lynnmcguire5@gmail.com> - 2021-06-10 16:59 -0500
  Re: good reference on threads Öö Tiib <ootiib@hot.ee> - 2021-06-10 15:49 -0700
    Re: good reference on threads Öö Tiib <ootiib@hot.ee> - 2021-06-10 17:58 -0700
    Re: good reference on threads Lynn McGuire <lynnmcguire5@gmail.com> - 2021-06-10 20:31 -0500
      Re: good reference on threads Öö Tiib <ootiib@hot.ee> - 2021-06-10 20:31 -0700
        Re: good reference on threads "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-06-10 21:32 -0700
          Re: good reference on threads "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-06-10 21:33 -0700
      Re: good reference on threads Ian Collins <ian-news@hotmail.com> - 2021-06-11 20:17 +1200
        Re: good reference on threads Lynn McGuire <lynnmcguire5@gmail.com> - 2021-06-11 14:13 -0500
      Re: good reference on threads Paavo Helde <myfirstname@osa.pri.ee> - 2021-06-11 14:03 +0300
        Re: good reference on threads Paavo Helde <myfirstname@osa.pri.ee> - 2021-06-11 15:19 +0300
        Re: good reference on threads "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-06-12 14:41 -0700
  Re: good reference on threads Lynn McGuire <lynnmcguire5@gmail.com> - 2021-06-10 22:03 -0500
    Re: good reference on threads "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-06-10 20:08 -0700
      Re: good reference on threads Lynn McGuire <lynnmcguire5@gmail.com> - 2021-07-01 22:27 -0500
        Re: good reference on threads "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2021-07-01 21:28 -0700
        Re: good reference on threads legalize+jeeves@mail.xmission.com (Richard) - 2021-07-27 01:21 +0000
    Re: good reference on threads Cholo Lennon <chololennon@hotmail.com> - 2021-06-12 23:06 -0300
      Re: good reference on threads Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-06-12 21:47 -0700
        Re: good reference on threads Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2021-06-12 21:49 -0700
    Re: good reference on threads legalize+jeeves@mail.xmission.com (Richard) - 2021-07-27 01:19 +0000
    Re: good reference on threads Bonita Montero <Bonita.Montero@gmail.com> - 2021-07-27 03:58 +0200

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