Re: [Boost-users] Boost 1.35 threads library question

From: Anthony Williams (anthony.ajw_at_[hidden])
Date: 2008-05-22 12:17:36

Chris Ross <cross+boost_at_[hidden]> writes:

>   Hi there.  This is an introductory question as I've just started to
> play with boost libraries.  If this would be better on the threads-devel
> list, let me know, but I thought starting here would be good.

Here is fine.

>   I was playing with the threads library in 1.35, and I noticed that I
> can't (with gcc 4.3 on Linux) put boost::thread objects into an STL
> container.  I think I was trying with a std::vector, in case that
> matters.

No, you can't do that. You need a container that can handle
movable-but-not-copyable objects. Not only that, but it needs to
handle the thread move emulation.

>   I was reading in some of the C++0x documents that it's expected that
> the standard library thread implementation is expected to be able to
> have this work.  The boost documentation doesn't explicitly say whether
> it should work or not.  Is being non-copyable but movable enough to make
> this work?  Or, would an object have to be copyable to be put into an
> STL container?  I thought that was not the case, but.

Non-copyable but movable is indeed enough for a class to be used in a
C++0x STL container. I don't know whether the containers with gcc 4.3
have that support in -std=c++0x mode or not. The current trunk has
some rvalue reference support in boost::thread, so it may well work,
but I haven't tried it.

Anthony
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