Hi Ruben!

On Mon, Sep 19, 2011 at 1:46 PM, Ruben Van Boxem
<[email protected]> wrote:
> Op 19 sep. 2011 01:08 schreef "K. Frank" <[email protected]> het volgende:
> ...
> There are *experimental* GCC 4.7 and 4.6 builds available, but for now only
> linking with "-static" works.
>
> GCC 4.6:
> http://code.google.com/p/pcxprj/downloads/detail?name=MinGW_gcc4.6.2.20110826_static_enable_std_thread_test.7z&can=2&q=
>
> GCC 4.7:
> http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/rubenvb/
> and
> http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win32/Personal%20Builds/rubenvb/

First of all, thanks for providing these.  Sorry I haven't had the chance to
try them yet -- I am eager to, but I've been jammed with other things.

>> ...
>> I believe that the mingw-w64 support of std::thread is official, but
>> perhaps
>> someone from the mingw-w64 list could comment on this so that I don't
>> put words in anyone's mouth.
>
> It's not fully functional yet (libstdc++ dll throws an uncaught exception,
> link with -static to work around this), so I'd hardly say it's official
> support...
> Work is being done on getting it working completely  and correctly :-)

Thanks for clarifying.  I'm certainly not trying to put you on the spot
with exaggerated claims.  (And for everyone's information, Ruben will
be releasing a c++22-compliant personal build next week.)

By the way, could you give me a brief explanation of the implications
of using "-static"?  What do I lose; what do I gain?  Would I have to
modify my code to use it?

> ...
>> I have implemented a native windows version of std::thread for g++
>> (mingw and mingw-w64)...
>> ...
> Why not use portable boost:: thread in the meantime? It's naturally very
> similar to the c++11 version, and is a nice abstraction of platform threads.
> I also don't see any problem in using pthreads, except that it is very
> low-level. Winpthreads takes care of any licensing worries you may have with
> pthreads-win32 and is actively developed, do problems you may encounter are
> fixed quickly.

Boost is great.  By way of explanation, my goal wasn't to get access to
a threading api (portable or not).  If it were, I might have used boost, but
probably would have used pthreads or maybe the windows threading api.

Rather my goal was to get std::thread working with gcc on windows (i.e.,
with either mingw or mingw-w64).  It wasn't available at the time so I
developed two solutions: one tweaking gcc's std::thread implementation
so that it would work with pthreads-win32, and the other a native
implementation (for a minor performance increase, and to work around
the pthreads-win32 licensing issues).

Nothing against boost -- just a different goal.

> Ruben

Thanks.


K. Frank

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