505
Subj : Re: exit_group: unfinished ... exit status 144
To   : comp.programming.threads
From : annamalai.gurusami
Date : Fri Aug 19 2005 03:32 am

loic-dev@gmx.net wrote:

> But I believe, you could avoid cancelling threads in the atexit
> handlers and use another solution, based e.g. on condition variable.
> This works.

So, this problem is also related to thread cancellation?!  I
think, now I have to seriously think about implementing this
using alternate methods.

Just for the context, I wanted to explain the current scenario.
We have two APIs called BlzSys::open() and BlzSys::close().
If the application is like this

int main()
{
    BlzSys::open();   // this creates two threads.
                      // registers atexit handlers.
    BlzSys::close();  // this does thread cancellation stuff
    exit(0);
}

Then it works fine.  But if the application does

int main()
{
    BlzSys::open();
    exit(0); // atexit handler calls BlzSys::close()
}

And this does NOT work fine!  The strace showed that exit_group
somehow fails in this scenario.  No idea why.  I guess re-writing
this part of the code, using condition variables might solve the
problem.  Have to code it up and check it.

Thanks for your response.

Rgds,
anna

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