C++ and pthreads

Question

Has anyone been able to get a program written in C++ (using STL) and using pthreads to run succesfully on uClinux?

Depending on which toolchain I use, I can get one or the other to work, but not both.

altera_forum · Answer

He have successfully developed a large application which uses STL extensively, especially container templates.

However, we weren't able to compile even the simplest application with C++ and pthreads combined. If I recall correctly, we could make a sample application run, but when we used strings, vectors, or any interesting stuff, the test program would halt.

Cheers,

Ricardo.

altera_forum · Answer

In a no-MMU environment "__thread" variables are not available, this might prevent c++ in a threaded application.

In an MMU enabled environment atomic operations are not (yet) functional. This will result in a memory manager work either slow (using OS based locks) or not correctly (when trying to use the not yet implemented atomic functions).

-Michael

altera_forum · Answer

Its weird that if I compile a C program with pthreads, it works fine. But if I compile a C++ program with pthreads, it hangs at the first pthread_create call. I'm pretty fuzzy on the low level details, but why would there be a difference there?

Thanks

altera_forum · Answer

Do you have any restrictions on using the MMU Linux distribution? (http://www.nioswiki.com/linux)

It seems like it should be more capable of handling this kind of task correctly. Unfortunately, we are just starting experimenting with it, so I don't have much useful advise.

Good luck,

Ricardo.

altera_forum · Answer

Well, the card we are using doesn't have an MMU, so that probably won't work for me.  Thanks for the advice though.

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C++ and pthreads

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