On Fri, 27 Jun 2014 14:00:06, K. Frank wrote:
> Well, it's not as easy... The code currently use a portable lib (Qt) for
> the
> > threads but the question is about splitting a part of the app code for
> > making a lib, intended to be used in a plugin sdk. And asking the
> customer
> > to depend on external libraries is a sensitive topic...
>
> It's not entirely clear to me what your problem is. (In your original
> question
> you asked whether you could detect pthreads vs. win32 threads with the
> preprocessor at compile time.)
>
> Why not use g++ / pthreads on linux, and mingw-w64's g++ / winpthreads
> on windows and just use pthreads for your threading code? I would expect
> (expect, but don't know for certain) that the Qt's QThreads end up getting
> mapped to native pthreads on linux and to win32 threads on windows. But
> unless you try to synchronize your own "user" pthreads with QThreads, I
> think you should be able to use both pthreads and QThreads in the same
> application both on linux and windows.
>
> Could you sketch out the precise use case that you're concerned about?
>
I will probably do that (or even use std::thread).
The concern I had were about these posts & articles stating that mingw-w64
posix threads have a significant lower performance than win32 threads. As
I'm writing a monte-carlo integration, which is running on clusters, and
for which 5% perf drop is a money loss, I was thinking of writing a
win32-thread specific code and use the win32 only mingw-w64 build for that.
Hence the preprocessor question.
Etienne
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