Re: [boost] Boost thread problem with fork() on 2.6 Linux (Ubuntu 7.10) boost 1.34.1

From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2008-06-09 08:47:24

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On Monday 09 June 2008 06:32 am, Anthony Williams wrote:
> Sami Väisänen <sami.vaisanen_at_[hidden]> writes:
> > I have an application that forks a child process. The child exists only
> > for a little while, (does dup2() calls to redirect stdout/stderr output
> > into pipes and then makes a system() call) and then exits with exit().
> > However at exit I get an assertion failure in boost.thread library (the
> > assertion happens in the child process)
> >
> > 
> > ../boost_1_34_1/libs/thread/src/condition.cpp:351:boost::detail::conditio
> >n_impl::~condition_impl(): Assertion `res == 0'
>
> That error indicates that the underlying condition variable couldn't
> be destroyed properly. Are you sure that your OS correctly clones
> condition variables when you do a fork?

pthreads (at least the version I have) requires mutexes to be re-initialized 
in the child process after a fork, as mentioned in the pthread_atfork man 
page.
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