GCC: C0x11 threading support

GCC: C0x11 threading support

[Erotavlas_turbo]

Hi,

I have read that the threading programming proposed in new C++ standard 
(C0x11) is supported by GCC but only a small subset of features are available. 
So for the moment is better to use the boost thread library (that should be the 
same adopted by new standard, correct me if I'm wrong) or the complete support 
by GCC is not so far?

Thank you

Best Regards

Re: GCC: C0x11 threading support

[Jonathan Wakely]

On 25 November 2011 08:59, Erotavlas_turbo@libero.it wrote:
> Hi,
>
> I have read that the threading programming proposed in new C++ standard
> (C0x11)

(It was informally called C++0x but is now published and often
referred to as C++11, but calling it C++0x11 makes no sense.)

> is supported by GCC but only a small subset of features are available.
> So for the moment is better to use the boost thread library (that should be the
> same adopted by new standard, correct me if I'm wrong) or the complete support
> by GCC is not so far?

Since you suggest Boost as an alternative I assume you are only
talking about the new library classes (since that's all Boost
provides).  The library features are almost complete:
http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.200x

There is more work to be done for the core language features:
http://gcc.gnu.org/projects/cxx0x.html
http://gcc.gnu.org/wiki/Atomic/
http://gcc.gnu.org/wiki/Atomic/GCCMM

Re: GCC: C0x11 threading support

[Jonathan Wakely]

On 25 November 2011 10:01, Jonathan Wakely wrote:
> On 25 November 2011 08:59, Erotavlas_turbo@libero.it wrote:
>> Hi,
>>
>> I have read that the threading programming proposed in new C++ standard
>> (C0x11)
>
> (It was informally called C++0x but is now published and often
> referred to as C++11, but calling it C++0x11 makes no sense.)

Sorry, I meant calling it C0x11 makes no sense (although C++0x11 doesn't either)

Re: GCC: C0x11 threading support

[Marc Glisse]

On Fri, 25 Nov 2011, Jonathan Wakely wrote:

> On 25 November 2011 08:59, Erotavlas_turbo@libero.it wrote:
>> Hi,
>>
>> I have read that the threading programming proposed in new C++ standard
>> (C0x11)
>
> (It was informally called C++0x but is now published and often
> referred to as C++11, but calling it C++0x11 makes no sense.)
>
>> is supported by GCC but only a small subset of features are available.
>> So for the moment is better to use the boost thread library (that should be the
>> same adopted by new standard, correct me if I'm wrong) or the complete support
>> by GCC is not so far?
>
> Since you suggest Boost as an alternative I assume you are only
> talking about the new library classes (since that's all Boost
> provides).  The library features are almost complete:
> http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.200x
>
> There is more work to be done for the core language features:
> http://gcc.gnu.org/projects/cxx0x.html
> http://gcc.gnu.org/wiki/Atomic/
> http://gcc.gnu.org/wiki/Atomic/GCCMM

Those don't seem to mention that the branch was recently merged into 
trunk. That doesn't make the support complete though.

-- 
Marc Glisse

Re: GCC: C0x11 threading support

[Jonathan Wakely]

On 25 November 2011 10:24, Marc Glisse wrote:
> On Fri, 25 Nov 2011, Jonathan Wakely wrote:
>>
>> There is more work to be done for the core language features:
>> http://gcc.gnu.org/projects/cxx0x.html
>> http://gcc.gnu.org/wiki/Atomic/
>> http://gcc.gnu.org/wiki/Atomic/GCCMM
>
> Those don't seem to mention that the branch was recently merged into trunk.
> That doesn't make the support complete though.

I've just updated the "Status" section at http://gcc.gnu.org/wiki/Atomic/GCCMM

Aldy, Andrew, I hope that's OK.

Re: GCC: C0x11 threading support

[Andrew MacLeod]

On 11/25/2011 06:29 AM, Jonathan Wakely wrote:
> I've just updated the "Status" section at http://gcc.gnu.org/wiki/Atomic/GCCMM
>
> Aldy, Andrew, I hope that's OK.
Sure. I'm a little behind in my administrivia...  :-)

Andrew

Re: GCC: C0x11 threading support

[Jonathan Wakely]

On 29 November 2011 15:30, Erotavlas_turbo@libero.it wrote:
> So what are the differencies between the boost thread library and the future
> C++11 thread library? I have read that they should be the same...

boost::thread supports thread interruption, a feature not present in C++11.
http://www.boost.org/doc/libs/1_48_0/doc/html/thread/thread_management.html#thread.thread_management.interruption

A joinable boost::thread will detach automatically if it goes out of
scope, a std::thread will call std::terminate.
http://www.boost.org/doc/libs/1_48_0/doc/html/thread/thread_management.html#thread.thread_management.joining_and_detaching

Boost provides a thread_group class.

For more details you should probably ask on the Boost list, it's not
really relevant to GCC.

Re: GCC: C0x11 threading support

[Erotavlas_turbo]

So what are the differencies between the boost thread library and the future 
C++11 thread library? I have read that they should be the same...

Thank you

Re: GCC: C0x11 threading support

[Jonathan Wakely]

On 29 November 2011 09:31, Erotavlas_turbo@libero.it wrote:
> Ok, I have understood that the new library of C++11 is nearly complete and it
> is almost the same of boost library.

I don't think that's what I said.

> As you have noticed the support of GCC for
> the core feature is not still complete, but can I use the library (embedded or
> boost) for threading programming?

Yes.

> Or I'm limited by the compiler?If yes what are
> the use of the library?

Creating and using mutexes, locks, threads, futures, promises etc.

What you do with them is up to you.

Re: GCC: C0x11 threading support

[Erotavlas_turbo]

Ok, I have understood that the new library of C++11 is nearly complete and it 
is almost the same of boost library. As you have noticed the support of GCC for 
the core feature is not still complete, but can I use the library (embedded or 
boost) for threading programming?Or I'm limited by the compiler?If yes what are 
the use of the library?

Thank you

Re: GCC: C0x11 threading support

[Jonathan Wakely]

On 28 November 2011 14:43, Erotavlas_turbo@libero.it wrote:
>  for your fast reply.
> I have understood that the support for C++11 (I hope it's right :)) is still
> not complete.

I'm still not sure if you're talking about the compiler support or
library support.

Library support (std::mutex, std::thread, std::future etc.) is very
nearly complete.

Compiler support needs more work, but is quite usable.  Using Boost
might not help there anyway, because Boost can't make the compiler
support something that it doesn't support.

> But my fundamental question is how long does it take the
> development process?

Until it's ready  ;-)

> Is there a roadmap?

No, I don't think so.

Re: GCC: C0x11 threading support

[Erotavlas_turbo]

 for your fast reply.
I have understood that the support for C++11 (I hope it's right :)) is still 
not complete. But my fundamental question is how long does it take the 
development process? Is there a roadmap?

Thank you