Re: Can a Multi-Threaded GTKMM Application Use std::thread Rather Than Glib::Thread?

[Chris Gordon-Smith <c gordonsmith gmail com>]

Thanks. Its really that:-

1)  I'm having to increase the amount of my code that is dependent on
non C++ standard code, and...
2)  If I want to make more use of multi-threading by parallelising my
simulation code on my 4-core processor, then I'll have to either make
even more code dependent on Glib, or use two different threading systems
within the same application.

Chris Gordon-Smith
www.simsoup.info


On Sun, 2011-10-16 at 20:32 +0100, Harry van Haaren wrote:
> Apologies, for the double...
> 
> The point I'm trying to make w.r.t dependencies is that gtkmm-2.4
> depends on glib-2.0, so I don't think you can remove the dependency on
> glib.
> 
> Indeed you don't *manually* include <glib.h> or <glibmm.h>, but the
> underlying library is used by the rest of gtkmm, so you effectively
> have nothing to gain by not including it... (As far as I understand
> anyway)
> 
> On Sun, Oct 16, 2011 at 8:29 PM, Harry van Haaren
> <harryhaaren gmail com> wrote:
>         Ah ok, yes I get you now.
>         
>         Unfortunatly pkg-config tells me this:
>         pkg-config --libs gtkmm-2.4 
>         -pthread -lgtkmm-2.4 -latkmm-1.6 -lgdkmm-2.4 -lgiomm-2.4
>         -lpangomm-1.4 -lgtk-x11-2.0 -lglibmm-2.4 -lcairomm-1.0
>         -lsigc-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0
>         -lgdk_pixbuf-2.0 -lm -lpangocairo-1.0 -lcairo -lpango-1.0
>         -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0
>         -lgthread-2.0 -lrt -lglib-2.0 
>         
>         So there's quite some deps for 2.4, I don't know if gtkmm-3
>         has less dependencies (I haven't switched yet) but I doubt it
>         somehow. The reason that all threading / OS specific stuff is
>         abstracted & "generic"-ized across platforms is so that the
>         same source will compile cross platfrom... you're probably
>         well aware of this.
>         
>         That means that if your using GTK, your going to need the GTK
>         subsystem for files, threads, X, name it... because some of
>         them are platform specific, I don't know is it possible to use
>         the generic C++11 or C++0x threads as a *replacement*,
>         although I'm sure you can use them as an *alternative*.
>         
>         I'm not a gtkmm-dev, so I'm in over my head a little here...
>         Perhaps some of the veterans of this list would like to shed
>         some light on if its practical to do what the OP mentions...
>         
>         I'll be keeping an eye on the thread for my own learning... :)
>         -Harry
>         
>         
>         
>         On Sun, Oct 16, 2011 at 7:44 PM, Chris Gordon-Smith
>         <c gordonsmith gmail com> wrote:
>                 Hello Harry
>                 
>                 Thanks for the response.
>                 
>                 What I want to do is minimise the dependencies that my
>                 code has on
>                 various libraries other than the C++ standard library.
>                 
>                 Since the C++ standard library does not include a GUI,
>                 I use GTKMM,
>                 which I'm very happy with. I have separated out my GUI
>                 presentation code
>                 from the rest of the code, and only the GUI
>                 presentation code has to
>                 include <gtkmm.h>. But to get the multithreading for
>                 the GUI working, I
>                 have now had to introduce a dependency on Glib
>                 <glibmm.h> in other parts
>                 of my code. I have used wrapper classes to limit the
>                 scope of the
>                 dependency to a small section of code, but I would
>                 have preferred not to
>                 do this at all.
>                 
>                 My question is: Could I have avoided use of
>                 Glib::Thread altogether, and
>                 just used std::thread?
>                 
>                 I think probably not, but thought I would ask.
>                 
>                 Chris Gordon-Smith
>                 www.simsoup.info
>                 
>                 
>                 
>                 On Sun, 2011-10-16 at 17:44 +0100, Harry van Haaren
>                 wrote:
>                 > Hi Chris,
>                 >
>                 > From experience: Of course it is, if you   1. mutex
>                 critical sections
>                 > or 2. lock-free ringbuffer   all events between the
>                 threads, there's
>                 > no reason you can't use 2 (or more) different
>                 "types" of threads in
>                 > one app.
>                 >
>                 > From a practical point of view, why would you?
>                 Glib::Thread should
>                 > suffice for simulator / GUI separation...
>                 >
>                 > Perhaps I'm not following your use-case, or maybe
>                 you want to play
>                 > with the latest-and-greatest, I don't know.
>                 > I know there's some convenience things around
>                 std::thread that you
>                 > might want for ease of use.. but I've always
>                 > coded those myself..
>                 >
>                 > -Harry
>                 >
>                 > On Sun, Oct 16, 2011 at 4:28 PM, Chris Gordon-Smith
>                 > <c gordonsmith gmail com> wrote:
>                 >         Hello All
>                 >
>                 >         I have recently introduced multi-threading
>                 into my artificial
>                 >         chemistry
>                 >         simulator, so that the GUI can be active
>                 while the simulation
>                 >         is
>                 >         running.
>                 >
>                 >         To do this, I've used Glib::Thread. Now that
>                 C++11 provides
>                 >         threading
>                 >         with std::thread, I would prefer to use
>                 that. Is it possible
>                 >         to use
>                 >         std::thread so that I have one thread for my
>                 GTKMM GUI, and
>                 >         one (or
>                 >         more) for my simulation processing?
>                 >
>                 >         Chris Gordon-Smith
>                 >         www.simsoup.info
>                 >
>                 >
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